diff --git a/.github/actions/create-venv/action.yml b/.github/actions/create-venv/action.yml
index c8883621e..484ad892f 100644
--- a/.github/actions/create-venv/action.yml
+++ b/.github/actions/create-venv/action.yml
@@ -1,3 +1,6 @@
+name: Create venv
+description: Pythonの仮想環境を作成し、$PATHと$VIRTUAL_ENVを設定する。
+
 runs:
   using: composite
   steps:
diff --git a/.github/actions/rust-toolchain-from-file/action.yml b/.github/actions/rust-toolchain-from-file/action.yml
index d82c9c159..917faed3c 100644
--- a/.github/actions/rust-toolchain-from-file/action.yml
+++ b/.github/actions/rust-toolchain-from-file/action.yml
@@ -1,3 +1,6 @@
+name: rustup toolchain install from file
+description: rust-toolchainファイルをもとにRustのツールチェーンをインストールする。
+
 inputs:
   targets:
     required: false
diff --git a/.github/workflows/build_and_deploy.yml b/.github/workflows/build_and_deploy.yml
index caabb9d78..1b468a33a 100644
--- a/.github/workflows/build_and_deploy.yml
+++ b/.github/workflows/build_and_deploy.yml
@@ -443,7 +443,7 @@ jobs:
       - name: Set up Rust
         uses: ./.github/actions/rust-toolchain-from-file
       - name: Set up Java
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
           java-version: "17"
           distribution: "adopt"
diff --git a/.github/workflows/generate_document.yml b/.github/workflows/generate_document.yml
index e3890d82a..37c39a1dd 100644
--- a/.github/workflows/generate_document.yml
+++ b/.github/workflows/generate_document.yml
@@ -21,7 +21,7 @@ jobs:
         with:
           python-version: "3.8"
       - name: Setup Java
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
           java-version: "11"
           distribution: "adopt"
diff --git a/.github/workflows/java_lint.yml b/.github/workflows/java_lint.yml
index c75222912..ad408e3a7 100644
--- a/.github/workflows/java_lint.yml
+++ b/.github/workflows/java_lint.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-java@v2
+      - uses: actions/setup-java@v4
         with:
           java-version: "11"
           distribution: "adopt"
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4ff92a84b..0496eebdb 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -277,13 +277,6 @@ jobs:
           pip install --upgrade poetry
           poetry install --with dev --with test
       - run: cargo build -p test_util -vv # build scriptにより/crates/test_util/data/の生成
-      # `macos-latest`(=`macos-12`)で次の問題が発生するため、それに対するワークアラウンド
-      # https://github.com/VOICEVOX/voicevox_core/issues/653#issuecomment-1782108410
-      - if: startsWith(matrix.os, 'mac')
-        name: Build open_jtalk-sys
-        run: |
-          poetry run -- cargo build -p voicevox_core_python_api -vv || true
-          [ -n "$(find ../../target/debug/deps -name 'libopen_jtalk_sys-*.rlib')" ]
       - run: poetry run maturin build --locked
       - run: poetry run maturin develop --locked
       - name: 必要なDLLをコピーしてpytestを実行
@@ -296,7 +289,7 @@ jobs:
       - name: Exampleを実行
         run: |
           for file in ../../example/python/run{,-asyncio}.py; do
-            poetry run python "$file" ../../model/sample.vvm --dict-dir ../test_util/data/open_jtalk_dic_utf_8-1.11
+            poetry run python "$file" ../test_util/data/model/sample.vvm --dict-dir ../test_util/data/open_jtalk_dic_utf_8-1.11
           done
   build-and-test-java-api:
     strategy:
@@ -312,7 +305,7 @@ jobs:
       - name: Set up Rust
         uses: ./.github/actions/rust-toolchain-from-file
       - name: Set up Java
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
           java-version: "11"
           distribution: "adopt"
diff --git a/Cargo.lock b/Cargo.lock
index 6222c0f39..4015b7e36 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,26 +17,6 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
-[[package]]
-name = "aead"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fc95d1bdb8e6666b2b217308eeeb09f2d6728d104be3e31916cc74d15420331"
-dependencies = [
- "generic-array",
-]
-
-[[package]]
-name = "aes"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "884391ef1066acaa41e766ba8f596341b96e93ce34f9a43e7d24bf0a0eaf0561"
-dependencies = [
- "aes-soft",
- "aesni",
- "cipher 0.2.5",
-]
-
 [[package]]
 name = "aes"
 version = "0.7.5"
@@ -44,45 +24,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e8b47f52ea9bae42228d07ec09eb676433d7c4ed1ebdf0f1d1c29ed446f1ab8"
 dependencies = [
  "cfg-if",
- "cipher 0.3.0",
+ "cipher",
  "cpufeatures",
  "opaque-debug",
 ]
 
-[[package]]
-name = "aes-gcm"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5278b5fabbb9bd46e24aa69b2fdea62c99088e0a950a9be40e3e0101298f88da"
-dependencies = [
- "aead",
- "aes 0.6.0",
- "cipher 0.2.5",
- "ctr",
- "ghash",
- "subtle",
-]
-
-[[package]]
-name = "aes-soft"
-version = "0.6.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be14c7498ea50828a38d0e24a765ed2effe92a705885b57d029cd67d45744072"
-dependencies = [
- "cipher 0.2.5",
- "opaque-debug",
-]
-
-[[package]]
-name = "aesni"
-version = "0.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea2e11f5e94c2f7d386164cc2aa1f97823fed6f259e486940a71c174dd01b0ce"
-dependencies = [
- "cipher 0.2.5",
- "opaque-debug",
-]
-
 [[package]]
 name = "aho-corasick"
 version = "1.1.2"
@@ -196,27 +142,6 @@ dependencies = [
  "yansi",
 ]
 
-[[package]]
-name = "async-attributes"
-version = "1.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3203e79f4dd9bdda415ed03cf14dae5a2bf775c683a00f94e9cd1faf0f596e5"
-dependencies = [
- "quote",
- "syn 1.0.102",
-]
-
-[[package]]
-name = "async-channel"
-version = "1.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e14485364214912d3b19cc3435dde4df66065127f05fa0d75c712f36f12c2f28"
-dependencies = [
- "concurrent-queue",
- "event-listener",
- "futures-core",
-]
-
 [[package]]
 name = "async-compression"
 version = "0.4.6"
@@ -230,97 +155,6 @@ dependencies = [
  "pin-project-lite",
 ]
 
-[[package]]
-name = "async-executor"
-version = "1.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "871f9bb5e0a22eeb7e8cf16641feb87c9dc67032ccf8ff49e772eb9941d3a965"
-dependencies = [
- "async-task",
- "concurrent-queue",
- "fastrand 1.8.0",
- "futures-lite 1.12.0",
- "once_cell",
- "slab",
-]
-
-[[package]]
-name = "async-global-executor"
-version = "2.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0da5b41ee986eed3f524c380e6d64965aea573882a8907682ad100f7859305ca"
-dependencies = [
- "async-channel",
- "async-executor",
- "async-io",
- "async-lock",
- "blocking",
- "futures-lite 1.12.0",
- "once_cell",
-]
-
-[[package]]
-name = "async-io"
-version = "1.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83e21f3a490c72b3b0cf44962180e60045de2925d8dff97918f7ee43c8f637c7"
-dependencies = [
- "autocfg",
- "concurrent-queue",
- "futures-lite 1.12.0",
- "libc",
- "log",
- "once_cell",
- "parking",
- "polling",
- "slab",
- "socket2",
- "waker-fn",
- "winapi",
-]
-
-[[package]]
-name = "async-lock"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e97a171d191782fba31bb902b14ad94e24a68145032b7eedf871ab0bc0d077b6"
-dependencies = [
- "event-listener",
-]
-
-[[package]]
-name = "async-std"
-version = "1.12.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62565bb4402e926b29953c785397c6dc0391b7b446e45008b0049eb43cec6f5d"
-dependencies = [
- "async-attributes",
- "async-channel",
- "async-global-executor",
- "async-io",
- "async-lock",
- "crossbeam-utils",
- "futures-channel",
- "futures-core",
- "futures-io",
- "futures-lite 1.12.0",
- "gloo-timers",
- "kv-log-macro",
- "log",
- "memchr",
- "once_cell",
- "pin-project-lite",
- "pin-utils",
- "slab",
- "wasm-bindgen-futures",
-]
-
-[[package]]
-name = "async-task"
-version = "4.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a40729d2133846d9ed0ea60a8b9541bccddab49cd30f0715a1da672fe9a2524"
-
 [[package]]
 name = "async-trait"
 version = "0.1.57"
@@ -340,17 +174,11 @@ checksum = "527207465fb6dcafbf661b0d4a51d0d2306c9d0c2975423079a6caa807930daf"
 dependencies = [
  "async-compression",
  "crc32fast",
- "futures-lite 2.2.0",
+ "futures-lite",
  "pin-project",
  "thiserror",
 ]
 
-[[package]]
-name = "atomic-waker"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "065374052e7df7ee4047b1160cca5e1467a12351a40b3da123c870ba0b8eda2a"
-
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -383,12 +211,6 @@ dependencies = [
  "rustc-demangle",
 ]
 
-[[package]]
-name = "base-x"
-version = "0.2.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4cbbc9d0964165b47557570cce6c952866c2678457aca742aafc9fb771d30270"
-
 [[package]]
 name = "base64"
 version = "0.13.0"
@@ -413,7 +235,7 @@ version = "0.62.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c6720a8b7b2d39dd533285ed438d458f65b31b5c257e6ac7bb3d7e82844dd722"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "cexpr",
  "clang-sys",
  "lazy_static",
@@ -429,6 +251,29 @@ dependencies = [
  "which",
 ]
 
+[[package]]
+name = "bindgen"
+version = "0.69.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a00dc851838a2120612785d195287475a3ac45514741da670b735818822129a0"
+dependencies = [
+ "bitflags 2.5.0",
+ "cexpr",
+ "clang-sys",
+ "itertools 0.11.0",
+ "lazy_static",
+ "lazycell",
+ "log",
+ "prettyplease",
+ "proc-macro2",
+ "quote",
+ "regex",
+ "rustc-hash",
+ "shlex",
+ "syn 2.0.48",
+ "which",
+]
+
 [[package]]
 name = "binstall-tar"
 version = "0.4.39"
@@ -447,13 +292,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
-name = "block-buffer"
-version = "0.9.0"
+name = "bitflags"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4152116fd6e9dadb291ae18fc1ec3575ed6d84c29642d97890f4b4a3417297e4"
-dependencies = [
- "generic-array",
-]
+checksum = "cf4b9d6a944f767f8e5e0db018570623c85f3d925ac718db4e06d0187adb21c1"
 
 [[package]]
 name = "block-buffer"
@@ -464,20 +306,6 @@ dependencies = [
  "generic-array",
 ]
 
-[[package]]
-name = "blocking"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6ccb65d468978a086b69884437ded69a90faab3bbe6e67f242173ea728acccc"
-dependencies = [
- "async-channel",
- "async-task",
- "atomic-waker",
- "fastrand 1.8.0",
- "futures-lite 1.12.0",
- "once_cell",
-]
-
 [[package]]
 name = "bstr"
 version = "1.2.0"
@@ -502,12 +330,6 @@ version = "1.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
-[[package]]
-name = "bytes"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e4cec68f03f32e44924783795810fa50a7035d8c8ebe78580ad7e6c703fba38"
-
 [[package]]
 name = "bytes"
 version = "1.1.0"
@@ -535,12 +357,6 @@ dependencies = [
  "pkg-config",
 ]
 
-[[package]]
-name = "cache-padded"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1db59621ec70f09c5e9b597b220c7a2b43611f4710dc03ceb8748637775692c"
-
 [[package]]
 name = "camino"
 version = "1.1.6"
@@ -616,15 +432,6 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fff857943da45f546682664a79488be82e69e43c1a7a2307679ab9afb3a66d2e"
 
-[[package]]
-name = "cipher"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12f8e7987cbd042a63249497f41aed09f8e65add917ea6566effbc56578d6801"
-dependencies = [
- "generic-array",
-]
-
 [[package]]
 name = "cipher"
 version = "0.3.0"
@@ -636,9 +443,9 @@ dependencies = [
 
 [[package]]
 name = "clang-sys"
-version = "1.4.0"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa2e27ae6ab525c3d369ded447057bca5438d86dc3a68f6faafb8269ba82ebf3"
+checksum = "77ed9a53e5d4d9c573ae844bfac6872b159cb1d1585a83b29e7a64b7eef7332a"
 dependencies = [
  "glob",
  "libc",
@@ -652,7 +459,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "86447ad904c7fb335a790c9d7fe3d0d971dc523b8ccd1561a520de9a85302750"
 dependencies = [
  "atty",
- "bitflags",
+ "bitflags 1.3.2",
  "clap_lex 0.2.4",
  "indexmap 1.9.1",
  "strsim",
@@ -667,7 +474,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3b1a0a4208c6c483b952ad35c6eed505fc13b46f08f631b81e828084a9318d74"
 dependencies = [
  "atty",
- "bitflags",
+ "bitflags 1.3.2",
  "clap_derive",
  "clap_lex 0.3.0",
  "once_cell",
@@ -764,7 +571,7 @@ version = "4.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "35ed6e9d84f0b51a7f52daf1c7d71dd136fd7a3f41a8462b8cdb8c78d920fad4"
 dependencies = [
- "bytes 1.1.0",
+ "bytes",
  "memchr",
 ]
 
@@ -774,7 +581,7 @@ version = "0.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "318d6c16e73b3a900eb212ad6a82fc7d298c5ab8184c7a9998646455bc474a16"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "concolor-query",
  "is-terminal",
 ]
@@ -785,15 +592,6 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "82a90734b3d5dcf656e7624cca6bce9c3a90ee11f900e80141a7427ccfb3d317"
 
-[[package]]
-name = "concurrent-queue"
-version = "1.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af4780a44ab5696ea9e28294517f1fffb421a83a25af521333c838635509db9c"
-dependencies = [
- "cache-padded",
-]
-
 [[package]]
 name = "console"
 version = "0.15.4"
@@ -807,12 +605,6 @@ dependencies = [
  "windows-sys 0.42.0",
 ]
 
-[[package]]
-name = "const_fn"
-version = "0.4.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fbdcdcb6d86f71c5e97409ad45898af11cbc995b4ee8112d59095a28d376c935"
-
 [[package]]
 name = "constant_time_eq"
 version = "0.1.5"
@@ -825,23 +617,6 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6245d59a3e82a7fc217c5828a6692dbc6dfb63a0c8c90495621f7b9d79704a0e"
 
-[[package]]
-name = "cookie"
-version = "0.14.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03a5d7b21829bc7b4bf4754a978a241ae54ea55a40f92bb20216e54096f4b951"
-dependencies = [
- "aes-gcm",
- "base64 0.13.0",
- "hkdf",
- "hmac 0.10.1",
- "percent-encoding",
- "rand 0.8.5",
- "sha2 0.9.9",
- "time 0.2.27",
- "version_check",
-]
-
 [[package]]
 name = "core-foundation-sys"
 version = "0.8.3"
@@ -857,12 +632,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "cpuid-bool"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcb25d077389e53838a8158c8e99174c5a9d902dee4904320db714f3c653ffba"
-
 [[package]]
 name = "crc32fast"
 version = "1.3.2"
@@ -925,16 +694,6 @@ dependencies = [
  "typenum",
 ]
 
-[[package]]
-name = "crypto-mac"
-version = "0.10.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bff07008ec701e8028e2ceb8f83f0e4274ee62bd2dbdc4fefff2e9a91824081a"
-dependencies = [
- "generic-array",
- "subtle",
-]
-
 [[package]]
 name = "cstr"
 version = "0.2.11"
@@ -955,46 +714,6 @@ dependencies = [
  "syn 1.0.102",
 ]
 
-[[package]]
-name = "ctr"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb4a30d54f7443bf3d6191dcd486aca19e67cb3c49fa7a06a319966346707e7f"
-dependencies = [
- "cipher 0.2.5",
-]
-
-[[package]]
-name = "curl"
-version = "0.4.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "509bd11746c7ac09ebd19f0b17782eae80aadee26237658a6b4808afb5c11a22"
-dependencies = [
- "curl-sys",
- "libc",
- "openssl-probe",
- "openssl-sys",
- "schannel",
- "socket2",
- "winapi",
-]
-
-[[package]]
-name = "curl-sys"
-version = "0.4.56+curl-7.83.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6093e169dd4de29e468fa649fbae11cdcd5551c81fe5bf1b0677adad7ef3d26f"
-dependencies = [
- "cc",
- "libc",
- "libnghttp2-sys",
- "libz-sys",
- "openssl-sys",
- "pkg-config",
- "vcpkg",
- "winapi",
-]
-
 [[package]]
 name = "cxx"
 version = "1.0.86"
@@ -1105,7 +824,7 @@ dependencies = [
  "convert_case",
  "proc-macro2",
  "quote",
- "rustc_version 0.4.0",
+ "rustc_version",
  "syn 1.0.102",
 ]
 
@@ -1121,32 +840,17 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6184e33543162437515c2e2b48714794e37845ec9851711914eec9d308f6ebe8"
 
-[[package]]
-name = "digest"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
-dependencies = [
- "generic-array",
-]
-
 [[package]]
 name = "digest"
 version = "0.10.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "adfbc57365a37acbd2ebf2b64d7e69bb766e2fea813521ed536f5d0520dcf86c"
 dependencies = [
- "block-buffer 0.10.3",
+ "block-buffer",
  "crypto-common",
  "subtle",
 ]
 
-[[package]]
-name = "discard"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "212d0f5754cb6769937f4501cc0e67f4f4483c8d2c3e1e922ee9edbe4ab4c7c0"
-
 [[package]]
 name = "doc-comment"
 version = "0.3.3"
@@ -1159,7 +863,7 @@ version = "0.0.0"
 dependencies = [
  "anyhow",
  "binstall-tar",
- "bytes 1.1.0",
+ "bytes",
  "clap 4.0.10",
  "flate2",
  "fs-err",
@@ -1331,12 +1035,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "event-listener"
-version = "2.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
-
 [[package]]
 name = "eyre"
 version = "0.6.8"
@@ -1384,17 +1082,6 @@ dependencies = [
  "miniz_oxide 0.6.2",
 ]
 
-[[package]]
-name = "flume"
-version = "0.9.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bebadab126f8120d410b677ed95eee4ba6eb7c6dd8e34a5ec88a08050e26132"
-dependencies = [
- "futures-core",
- "futures-sink",
- "spinning_top",
-]
-
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -1468,21 +1155,6 @@ version = "0.3.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4fff74096e71ed47f8e023204cfd0aa1289cd54ae5430a9523be060cdb849964"
 
-[[package]]
-name = "futures-lite"
-version = "1.12.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7694489acd39452c77daa48516b894c153f192c3578d5a839b62c58099fcbf48"
-dependencies = [
- "fastrand 1.8.0",
- "futures-core",
- "futures-io",
- "memchr",
- "parking",
- "pin-project-lite",
- "waker-fn",
-]
-
 [[package]]
 name = "futures-lite"
 version = "2.2.0"
@@ -1553,17 +1225,6 @@ dependencies = [
  "version_check",
 ]
 
-[[package]]
-name = "getrandom"
-version = "0.1.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8fc3cb4d91f53b50155bdcfd23f6a4c39ae1969c2ae85982b135750cccaf5fce"
-dependencies = [
- "cfg-if",
- "libc",
- "wasi 0.9.0+wasi-snapshot-preview1",
-]
-
 [[package]]
 name = "getrandom"
 version = "0.2.7"
@@ -1572,17 +1233,7 @@ checksum = "4eb1a864a501629691edf6c15a593b7a51eebaa1e8468e9ddc623de7c9b58ec6"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi 0.11.0+wasi-snapshot-preview1",
-]
-
-[[package]]
-name = "ghash"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97304e4cd182c3846f7575ced3890c53012ce534ad9114046b0a9e00bb30a375"
-dependencies = [
- "opaque-debug",
- "polyval",
+ "wasi",
 ]
 
 [[package]]
@@ -1608,25 +1259,13 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
 
-[[package]]
-name = "gloo-timers"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5fb7d06c1c8cc2a29bee7ec961009a0b2caa0793ee4900c2ffb348734ba1c8f9"
-dependencies = [
- "futures-channel",
- "futures-core",
- "js-sys",
- "wasm-bindgen",
-]
-
 [[package]]
 name = "h2"
 version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5f9f29bc9dda355256b2916cf526ab02ce0aeaaaf2bad60d65ef3f12f11dd0f4"
 dependencies = [
- "bytes 1.1.0",
+ "bytes",
  "fnv",
  "futures-core",
  "futures-sink",
@@ -1687,33 +1326,13 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
-[[package]]
-name = "hkdf"
-version = "0.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51ab2f639c231793c5f6114bdb9bbe50a7dbbfcd7c7c6bd8475dec2d991e964f"
-dependencies = [
- "digest 0.9.0",
- "hmac 0.10.1",
-]
-
-[[package]]
-name = "hmac"
-version = "0.10.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1441c6b1e930e2817404b5046f1f989899143a12bf92de603b69f4e0aee1e15"
-dependencies = [
- "crypto-mac",
- "digest 0.9.0",
-]
-
 [[package]]
 name = "hmac"
 version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
 dependencies = [
- "digest 0.10.5",
+ "digest",
 ]
 
 [[package]]
@@ -1722,7 +1341,7 @@ version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75f43d41e26995c17e71ee126451dd3941010b0514a81a9d11f3b341debc2399"
 dependencies = [
- "bytes 1.1.0",
+ "bytes",
  "fnv",
  "itoa",
 ]
@@ -1733,47 +1352,11 @@ version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d5f38f16d184e36f2408a55281cd658ecbd3ca05cce6d6510a176eca393e26d1"
 dependencies = [
- "bytes 1.1.0",
+ "bytes",
  "http",
  "pin-project-lite",
 ]
 
-[[package]]
-name = "http-client"
-version = "6.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1947510dc91e2bf586ea5ffb412caad7673264e14bb39fb9078da114a94ce1a5"
-dependencies = [
- "async-std",
- "async-trait",
- "cfg-if",
- "http-types",
- "isahc",
- "log",
-]
-
-[[package]]
-name = "http-types"
-version = "2.12.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e9b187a72d63adbfba487f48095306ac823049cb504ee195541e91c7775f5ad"
-dependencies = [
- "anyhow",
- "async-channel",
- "async-std",
- "base64 0.13.0",
- "cookie",
- "futures-lite 1.12.0",
- "infer",
- "pin-project-lite",
- "rand 0.7.3",
- "serde",
- "serde_json",
- "serde_qs",
- "serde_urlencoded",
- "url",
-]
-
 [[package]]
 name = "httparse"
 version = "1.8.0"
@@ -1801,7 +1384,7 @@ version = "0.14.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "034711faac9d2166cb1baf1a2fb0b60b1f277f8492fd72176c17f3515e1abd3c"
 dependencies = [
- "bytes 1.1.0",
+ "bytes",
  "futures-channel",
  "futures-core",
  "futures-util",
@@ -1919,12 +1502,6 @@ version = "2.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e186cfbae8084e513daff4240b4797e342f988cecda4fb6c939150f96315fd8"
 
-[[package]]
-name = "infer"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64e9829a50b42bb782c1df523f78d332fe371b10c661e78b7a3c34b0198e9fac"
-
 [[package]]
 name = "instant"
 version = "0.1.12"
@@ -1973,29 +1550,6 @@ dependencies = [
  "windows-sys 0.42.0",
 ]
 
-[[package]]
-name = "isahc"
-version = "0.9.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2948a0ce43e2c2ef11d7edf6816508998d99e13badd1150be0914205df9388a"
-dependencies = [
- "bytes 0.5.6",
- "crossbeam-utils",
- "curl",
- "curl-sys",
- "flume",
- "futures-lite 1.12.0",
- "http",
- "log",
- "once_cell",
- "slab",
- "sluice",
- "tracing",
- "tracing-futures",
- "url",
- "waker-fn",
-]
-
 [[package]]
 name = "itertools"
 version = "0.10.5"
@@ -2083,15 +1637,6 @@ dependencies = [
  "simple_asn1",
 ]
 
-[[package]]
-name = "kv-log-macro"
-version = "1.0.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0de8b303297635ad57c9f5059fd9cee7a47f8e8daa09df0fcd07dd39fb22977f"
-dependencies = [
- "log",
-]
-
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -2126,16 +1671,6 @@ version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "348108ab3fba42ec82ff6e9564fc4ca0247bdccdc68dd8af9764bbc79c3c8ffb"
 
-[[package]]
-name = "libnghttp2-sys"
-version = "0.1.7+1.45.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57ed28aba195b38d5ff02b9170cbff627e336a20925e43b4945390401c5dc93f"
-dependencies = [
- "cc",
- "libc",
-]
-
 [[package]]
 name = "libtest-mimic"
 version = "0.6.0"
@@ -2147,18 +1682,6 @@ dependencies = [
  "threadpool",
 ]
 
-[[package]]
-name = "libz-sys"
-version = "1.1.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9702761c3935f8cc2f101793272e202c72b99da8f4224a19ddcf1279a6450bbf"
-dependencies = [
- "cc",
- "libc",
- "pkg-config",
- "vcpkg",
-]
-
 [[package]]
 name = "link-cplusplus"
 version = "1.0.7"
@@ -2197,7 +1720,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
 dependencies = [
  "cfg-if",
- "value-bag",
 ]
 
 [[package]]
@@ -2254,16 +1776,6 @@ version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"
 
-[[package]]
-name = "mime_guess"
-version = "2.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4192263c238a5f0d0c6bfd21f336a313a4ce1c450542449ca191bb657b4642ef"
-dependencies = [
- "mime",
- "unicase",
-]
-
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
@@ -2296,7 +1808,7 @@ checksum = "e5d732bc30207a6423068df043e3d02e0735b155ad7ce1a6f76fe2baa5b158de"
 dependencies = [
  "libc",
  "log",
- "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasi",
  "windows-sys 0.42.0",
 ]
 
@@ -2306,7 +1818,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ffa00dec017b5b1a8b7cf5e2c008bfda1aa7e0697ac1508b491fdf2622fb4d8"
 dependencies = [
- "rand 0.8.5",
+ "rand",
 ]
 
 [[package]]
@@ -2334,7 +1846,7 @@ dependencies = [
  "noisy_float",
  "num-integer",
  "num-traits",
- "rand 0.8.5",
+ "rand",
 ]
 
 [[package]]
@@ -2457,7 +1969,7 @@ dependencies = [
  "arc-swap",
  "async-trait",
  "base64 0.21.0",
- "bytes 1.1.0",
+ "bytes",
  "cfg-if",
  "chrono",
  "either",
@@ -2514,7 +2026,7 @@ checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 [[package]]
 name = "open_jtalk"
 version = "0.1.25"
-source = "git+https://github.com/VOICEVOX/open_jtalk-rs.git?rev=70c76bb54522830e92803038191bf533ba68ce85#70c76bb54522830e92803038191bf533ba68ce85"
+source = "git+https://github.com/VOICEVOX/open_jtalk-rs.git?rev=e1940f3fd61a48bed5bbec8cd2645e13923b1f80#e1940f3fd61a48bed5bbec8cd2645e13923b1f80"
 dependencies = [
  "camino",
  "open_jtalk-sys",
@@ -2524,32 +2036,13 @@ dependencies = [
 [[package]]
 name = "open_jtalk-sys"
 version = "0.16.111"
-source = "git+https://github.com/VOICEVOX/open_jtalk-rs.git?rev=70c76bb54522830e92803038191bf533ba68ce85#70c76bb54522830e92803038191bf533ba68ce85"
+source = "git+https://github.com/VOICEVOX/open_jtalk-rs.git?rev=e1940f3fd61a48bed5bbec8cd2645e13923b1f80#e1940f3fd61a48bed5bbec8cd2645e13923b1f80"
 dependencies = [
- "bindgen",
+ "bindgen 0.62.0",
  "cmake",
  "link-cplusplus",
 ]
 
-[[package]]
-name = "openssl-probe"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"
-
-[[package]]
-name = "openssl-sys"
-version = "0.9.83"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "666416d899cf077260dac8698d60a60b435a46d57e82acb1be3d0dad87284e5b"
-dependencies = [
- "autocfg",
- "cc",
- "libc",
- "pkg-config",
- "vcpkg",
-]
-
 [[package]]
 name = "os_pipe"
 version = "1.1.2"
@@ -2674,7 +2167,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7676374caaee8a325c9e7a2ae557f216c5563a171d6997b0ef8a65af35147700"
 dependencies = [
  "base64ct",
- "rand_core 0.6.4",
+ "rand_core",
  "subtle",
 ]
 
@@ -2684,10 +2177,10 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "83a0692ec44e4cf1ef28ca317f14f8f07da2d95ec3fa01f86e4467b725e60917"
 dependencies = [
- "digest 0.10.5",
- "hmac 0.12.1",
+ "digest",
+ "hmac",
  "password-hash",
- "sha2 0.10.6",
+ "sha2",
 ]
 
 [[package]]
@@ -2738,41 +2231,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"
 
 [[package]]
-name = "pin-utils"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
-
-[[package]]
-name = "pkg-config"
-version = "0.3.25"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1df8c4ec4b0627e53bdf214615ad287367e482558cf84b109250b37464dc03ae"
-
-[[package]]
-name = "polling"
-version = "2.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "899b00b9c8ab553c743b3e11e87c5c7d423b2a2de229ba95b24a756344748011"
-dependencies = [
- "autocfg",
- "cfg-if",
- "libc",
- "log",
- "wepoll-ffi",
- "winapi",
-]
-
-[[package]]
-name = "polyval"
-version = "0.4.5"
+name = "pin-utils"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eebcc4aa140b9abd2bc40d9c3f7ccec842679cd79045ac3a7ac698c1a064b7cd"
-dependencies = [
- "cpuid-bool",
- "opaque-debug",
- "universal-hash",
-]
+checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
+
+[[package]]
+name = "pkg-config"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1df8c4ec4b0627e53bdf214615ad287367e482558cf84b109250b37464dc03ae"
 
 [[package]]
 name = "portable-atomic"
@@ -2833,6 +2301,16 @@ dependencies = [
  "yansi",
 ]
 
+[[package]]
+name = "prettyplease"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d3928fb5db768cb86f891ff014f0144589297e3c6a1aba6ed7cecfdace270c7"
+dependencies = [
+ "proc-macro2",
+ "syn 2.0.48",
+]
+
 [[package]]
 name = "proc-macro-error"
 version = "1.0.4"
@@ -2857,12 +2335,6 @@ dependencies = [
  "version_check",
 ]
 
-[[package]]
-name = "proc-macro-hack"
-version = "0.5.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
-
 [[package]]
 name = "proc-macro2"
 version = "1.0.78"
@@ -2977,19 +2449,6 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "rand"
-version = "0.7.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a6b1679d49b24bbfe0c803429aa1874472f50d9b363131f0e89fc356b544d03"
-dependencies = [
- "getrandom 0.1.16",
- "libc",
- "rand_chacha 0.2.2",
- "rand_core 0.5.1",
- "rand_hc",
-]
-
 [[package]]
 name = "rand"
 version = "0.8.5"
@@ -2997,18 +2456,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
  "libc",
- "rand_chacha 0.3.1",
- "rand_core 0.6.4",
-]
-
-[[package]]
-name = "rand_chacha"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f4c8ed856279c9737206bf725bf36935d8666ead7aa69b52be55af369d193402"
-dependencies = [
- "ppv-lite86",
- "rand_core 0.5.1",
+ "rand_chacha",
+ "rand_core",
 ]
 
 [[package]]
@@ -3018,16 +2467,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core 0.6.4",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
-dependencies = [
- "getrandom 0.1.16",
+ "rand_core",
 ]
 
 [[package]]
@@ -3036,16 +2476,7 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
- "getrandom 0.2.7",
-]
-
-[[package]]
-name = "rand_hc"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
-dependencies = [
- "rand_core 0.5.1",
+ "getrandom",
 ]
 
 [[package]]
@@ -3082,7 +2513,7 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
 ]
 
 [[package]]
@@ -3091,7 +2522,7 @@ version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
 ]
 
 [[package]]
@@ -3151,7 +2582,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68cc60575865c7831548863cc02356512e3f1dc2f3f82cb837d7fc4cc8f3c97c"
 dependencies = [
  "base64 0.13.0",
- "bytes 1.1.0",
+ "bytes",
  "encoding_rs",
  "futures-core",
  "futures-util",
@@ -3208,7 +2639,7 @@ dependencies = [
  "futures",
  "futures-timer",
  "rstest_macros",
- "rustc_version 0.4.0",
+ "rustc_version",
 ]
 
 [[package]]
@@ -3220,7 +2651,7 @@ dependencies = [
  "cfg-if",
  "proc-macro2",
  "quote",
- "rustc_version 0.4.0",
+ "rustc_version",
  "syn 1.0.102",
 ]
 
@@ -3231,8 +2662,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "88530b681abe67924d42cca181d070e3ac20e0740569441a9e35a7cedd2b34a4"
 dependencies = [
  "quote",
- "rand 0.8.5",
- "rustc_version 0.4.0",
+ "rand",
+ "rustc_version",
  "syn 2.0.48",
 ]
 
@@ -3248,22 +2679,13 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
-[[package]]
-name = "rustc_version"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
-dependencies = [
- "semver 0.9.0",
-]
-
 [[package]]
 name = "rustc_version"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
 dependencies = [
- "semver 1.0.14",
+ "semver",
 ]
 
 [[package]]
@@ -3272,7 +2694,7 @@ version = "0.36.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4fdebc4b395b7fbb9ab11e462e20ed9051e7b16e42d24042c776eca0ac81b03"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "errno 0.2.8",
  "io-lifetimes",
  "libc",
@@ -3286,7 +2708,7 @@ version = "0.37.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "acf8729d8542766f1b2cf77eb034d52f40d375bb8b615d0b147089946e16613d"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "errno 0.3.1",
  "io-lifetimes",
  "libc",
@@ -3336,16 +2758,6 @@ dependencies = [
  "winapi-util",
 ]
 
-[[package]]
-name = "schannel"
-version = "0.1.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88d6731146462ea25d9244b2ed5fd1d716d25c52e4d54aa4fb0f3c4e9854dbe2"
-dependencies = [
- "lazy_static",
- "windows-sys 0.36.1",
-]
-
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -3377,27 +2789,12 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "semver"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
-dependencies = [
- "semver-parser",
-]
-
 [[package]]
 name = "semver"
 version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e25dfac463d778e353db5be2449d1cce89bd6fd23c9f1ea21310ce6e5a1b29c4"
 
-[[package]]
-name = "semver-parser"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
-
 [[package]]
 name = "serde"
 version = "1.0.164"
@@ -3439,17 +2836,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "serde_qs"
-version = "0.8.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7715380eec75f029a4ef7de39a9200e0a63823176b759d055b613f5a87df6a6"
-dependencies = [
- "percent-encoding",
- "serde",
- "thiserror",
-]
-
 [[package]]
 name = "serde_spanned"
 version = "0.6.1"
@@ -3485,7 +2871,7 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_with_macros",
- "time 0.3.15",
+ "time",
 ]
 
 [[package]]
@@ -3500,15 +2886,6 @@ dependencies = [
  "syn 2.0.48",
 ]
 
-[[package]]
-name = "sha1"
-version = "0.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1da05c97445caa12d05e848c4a4fcbbea29e748ac28f7e80e9b010392063770"
-dependencies = [
- "sha1_smol",
-]
-
 [[package]]
 name = "sha1"
 version = "0.10.5"
@@ -3517,26 +2894,7 @@ checksum = "f04293dc80c3993519f2d7f6f511707ee7094fe0c6d3406feb330cdb3540eba3"
 dependencies = [
  "cfg-if",
  "cpufeatures",
- "digest 0.10.5",
-]
-
-[[package]]
-name = "sha1_smol"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae1a47186c03a32177042e55dbc5fd5aee900b8e0069a8d70fba96a9375cd012"
-
-[[package]]
-name = "sha2"
-version = "0.9.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d58a1e1bf39749807d89cf2d98ac2dfa0ff1cb3faa38fbb64dd88ac8013d800"
-dependencies = [
- "block-buffer 0.9.0",
- "cfg-if",
- "cpufeatures",
- "digest 0.9.0",
- "opaque-debug",
+ "digest",
 ]
 
 [[package]]
@@ -3547,7 +2905,7 @@ checksum = "82e6b795fe2e3b1e845bafcb27aa35405c4d47cdfc92af5fc8d3002f76cebdc0"
 dependencies = [
  "cfg-if",
  "cpufeatures",
- "digest 0.10.5",
+ "digest",
 ]
 
 [[package]]
@@ -3584,7 +2942,7 @@ dependencies = [
  "num-bigint",
  "num-traits",
  "thiserror",
- "time 0.3.15",
+ "time",
 ]
 
 [[package]]
@@ -3596,17 +2954,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "sluice"
-version = "0.5.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d7400c0eff44aa2fcb5e31a5f24ba9716ed90138769e4977a2ba6014ae63eb5"
-dependencies = [
- "async-channel",
- "futures-core",
- "futures-io",
-]
-
 [[package]]
 name = "smallvec"
 version = "1.13.1"
@@ -3652,79 +2999,12 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 
-[[package]]
-name = "spinning_top"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75adad84ee84b521fb2cca2d4fd0f1dab1d8d026bda3c5bea4ca63b5f9f9293c"
-dependencies = [
- "lock_api",
-]
-
-[[package]]
-name = "standback"
-version = "0.2.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e113fb6f3de07a243d434a56ec6f186dfd51cb08448239fe7bcae73f87ff28ff"
-dependencies = [
- "version_check",
-]
-
 [[package]]
 name = "static_assertions"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
-[[package]]
-name = "stdweb"
-version = "0.4.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d022496b16281348b52d0e30ae99e01a73d737b2f45d38fed4edf79f9325a1d5"
-dependencies = [
- "discard",
- "rustc_version 0.2.3",
- "stdweb-derive",
- "stdweb-internal-macros",
- "stdweb-internal-runtime",
- "wasm-bindgen",
-]
-
-[[package]]
-name = "stdweb-derive"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c87a60a40fccc84bef0652345bbbbbe20a605bf5d0ce81719fc476f5c03b50ef"
-dependencies = [
- "proc-macro2",
- "quote",
- "serde",
- "serde_derive",
- "syn 1.0.102",
-]
-
-[[package]]
-name = "stdweb-internal-macros"
-version = "0.2.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58fa5ff6ad0d98d1ffa8cb115892b6e69d67799f6763e162a1c9db421dc22e11"
-dependencies = [
- "base-x",
- "proc-macro2",
- "quote",
- "serde",
- "serde_derive",
- "serde_json",
- "sha1 0.6.1",
- "syn 1.0.102",
-]
-
-[[package]]
-name = "stdweb-internal-runtime"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "213701ba3370744dcd1a12960caa4843b3d68b4d1c0a5d575e0d65b2ee9d16c0"
-
 [[package]]
 name = "strsim"
 version = "0.10.0"
@@ -3782,29 +3062,6 @@ version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6bdef32e8150c2a081110b42772ffe7d7c9032b606bc226c8260fd97e0976601"
 
-[[package]]
-name = "surf"
-version = "2.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "718b1ae6b50351982dedff021db0def601677f2120938b070eadb10ba4038dd7"
-dependencies = [
- "async-std",
- "async-trait",
- "cfg-if",
- "encoding_rs",
- "futures-util",
- "getrandom 0.2.7",
- "http-client",
- "http-types",
- "log",
- "mime_guess",
- "once_cell",
- "pin-project-lite",
- "serde",
- "serde_json",
- "web-sys",
-]
-
 [[package]]
 name = "syn"
 version = "1.0.102"
@@ -3878,17 +3135,19 @@ name = "test_util"
 version = "0.0.0"
 dependencies = [
  "anyhow",
- "async-std",
- "async_zip",
+ "bindgen 0.69.4",
+ "camino",
  "flate2",
  "fs-err",
- "futures-lite 2.2.0",
+ "indoc",
+ "libloading",
  "once_cell",
+ "reqwest",
  "serde",
  "serde_json",
- "surf",
  "tar",
  "tokio",
+ "zip",
 ]
 
 [[package]]
@@ -3935,21 +3194,6 @@ dependencies = [
  "num_cpus",
 ]
 
-[[package]]
-name = "time"
-version = "0.2.27"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4752a97f8eebd6854ff91f1c1824cd6160626ac4bd44287f7f4ea2035a02a242"
-dependencies = [
- "const_fn",
- "libc",
- "standback",
- "stdweb",
- "time-macros 0.1.1",
- "version_check",
- "winapi",
-]
-
 [[package]]
 name = "time"
 version = "0.3.15"
@@ -3960,17 +3204,7 @@ dependencies = [
  "libc",
  "num_threads",
  "serde",
- "time-macros 0.2.4",
-]
-
-[[package]]
-name = "time-macros"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "957e9c6e26f12cb6d0dd7fc776bb67a706312e7299aed74c8dd5b17ebb27e2f1"
-dependencies = [
- "proc-macro-hack",
- "time-macros-impl",
+ "time-macros",
 ]
 
 [[package]]
@@ -3979,19 +3213,6 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42657b1a6f4d817cda8e7a0ace261fe0cc946cf3a80314390b22cc61ae080792"
 
-[[package]]
-name = "time-macros-impl"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd3c141a1b43194f3f56a1411225df8646c55781d5f26db825b3d98507eb482f"
-dependencies = [
- "proc-macro-hack",
- "proc-macro2",
- "quote",
- "standback",
- "syn 1.0.102",
-]
-
 [[package]]
 name = "tinyvec"
 version = "1.6.0"
@@ -4014,7 +3235,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3c786bf8134e5a3a166db9b29ab8f48134739014a3eca7bc6bfa95d673b136f"
 dependencies = [
  "autocfg",
- "bytes 1.1.0",
+ "bytes",
  "libc",
  "mio",
  "num_cpus",
@@ -4052,7 +3273,7 @@ version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0bb2e075f03b3d66d8d8785356224ba688d2906a371015e225beeb65ca92c740"
 dependencies = [
- "bytes 1.1.0",
+ "bytes",
  "futures-core",
  "futures-sink",
  "pin-project-lite",
@@ -4153,16 +3374,6 @@ dependencies = [
  "tracing-subscriber",
 ]
 
-[[package]]
-name = "tracing-futures"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
-dependencies = [
- "pin-project",
- "tracing",
-]
-
 [[package]]
 name = "tracing-log"
 version = "0.1.3"
@@ -4228,15 +3439,6 @@ dependencies = [
  "syn 1.0.102",
 ]
 
-[[package]]
-name = "unicase"
-version = "2.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
-dependencies = [
- "version_check",
-]
-
 [[package]]
 name = "unicode-bidi"
 version = "0.3.8"
@@ -4270,16 +3472,6 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c7de7d73e1754487cb58364ee906a499937a0dfabd86bcb980fa99ec8c8fa2ce"
 
-[[package]]
-name = "universal-hash"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f214e8f697e925001e66ec2c6e37a4ef93f0f78c2eed7814394e10c62025b05"
-dependencies = [
- "generic-array",
- "subtle",
-]
-
 [[package]]
 name = "untrusted"
 version = "0.7.1"
@@ -4327,7 +3519,7 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d023da39d1fde5a8a3fe1f3e01ca9632ada0a63e9797de55a879d6e2236277be"
 dependencies = [
- "getrandom 0.2.7",
+ "getrandom",
  "serde",
 ]
 
@@ -4337,22 +3529,6 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
 
-[[package]]
-name = "value-bag"
-version = "1.0.0-alpha.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2209b78d1249f7e6f3293657c9779fe31ced465df091bbd433a1cf88e916ec55"
-dependencies = [
- "ctor",
- "version_check",
-]
-
-[[package]]
-name = "vcpkg"
-version = "0.2.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
-
 [[package]]
 name = "version_check"
 version = "0.9.4"
@@ -4393,7 +3569,9 @@ dependencies = [
  "rstest_reuse",
  "serde",
  "serde_json",
+ "serde_with",
  "smallvec",
+ "strum",
  "tempfile",
  "test_util",
  "thiserror",
@@ -4435,7 +3613,6 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_with",
- "strum",
  "tempfile",
  "test_util",
  "thiserror",
@@ -4499,12 +3676,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "waker-fn"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d5b2c62b4012a3e1eca5a7e077d13b3bf498c4073e33ccd58626607748ceeca"
-
 [[package]]
 name = "walkdir"
 version = "2.3.3"
@@ -4525,12 +3696,6 @@ dependencies = [
  "try-lock",
 ]
 
-[[package]]
-name = "wasi"
-version = "0.9.0+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
-
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
@@ -4632,15 +3797,6 @@ dependencies = [
  "webpki",
 ]
 
-[[package]]
-name = "wepoll-ffi"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d743fdedc5c64377b5fc2bc036b01c7fd642205a0d96356034ae3404d49eb7fb"
-dependencies = [
- "cc",
-]
-
 [[package]]
 name = "which"
 version = "4.3.0"
@@ -4935,17 +4091,17 @@ version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "537ce7411d25e54e8ae21a7ce0b15840e7bfcff15b51d697ec3266cc76bdf080"
 dependencies = [
- "aes 0.7.5",
+ "aes",
  "byteorder",
  "bzip2",
  "constant_time_eq",
  "crc32fast",
  "crossbeam-utils",
  "flate2",
- "hmac 0.12.1",
+ "hmac",
  "pbkdf2",
- "sha1 0.10.5",
- "time 0.3.15",
+ "sha1",
+ "time",
  "zstd",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 21b9a0ac9..69d924a16 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,8 +8,8 @@ anstream = { version = "0.5.0", default-features = false }
 anstyle-query = "1.0.0"
 anyhow = "1.0.65"
 assert_cmd = "2.0.8"
-async-std = "1.12.0"
 async_zip = "=0.0.16"
+bindgen = "0.69.4"
 binstall-tar = "0.4.39"
 bytes = "1.1.0"
 camino = "1.1.6"
@@ -38,6 +38,7 @@ heck = "0.4.1"
 humansize = "2.1.2"
 indexmap = "2.0.0"
 indicatif = "0.17.3"
+indoc = "2.0.4"
 inventory = "0.3.4"
 itertools = "0.10.5"
 jlabel = "0.1.2"
@@ -69,7 +70,6 @@ serde_json = "1.0.85"
 serde_with = "3.3.0"
 smallvec = "1.13.1"
 strum = "0.24.1"
-surf = "2.3.2"
 syn = "2.0.38"
 tar = "0.4.38"
 tempfile = "3.6.0"
@@ -92,7 +92,7 @@ rev = "ebb9dcb9b26ee681889b52b6db3b4f642b04a250"
 
 [workspace.dependencies.open_jtalk]
 git = "https://github.com/VOICEVOX/open_jtalk-rs.git"
-rev = "70c76bb54522830e92803038191bf533ba68ce85"
+rev = "e1940f3fd61a48bed5bbec8cd2645e13923b1f80"
 
 # FIXME: iOS対応のpull request(https://github.com/wesleywiser/process_path/pull/16)がマージされる見込みが無いため
 [workspace.dependencies.process_path]
diff --git a/crates/test_util/Cargo.toml b/crates/test_util/Cargo.toml
index bea6e4d4e..d113b57ce 100644
--- a/crates/test_util/Cargo.toml
+++ b/crates/test_util/Cargo.toml
@@ -3,23 +3,25 @@ name = "test_util"
 edition.workspace = true
 
 [dependencies]
-async_zip = { workspace = true, features = ["deflate"] }
-futures-lite.workspace = true
+libloading.workspace = true
 once_cell.workspace = true
 serde = { workspace = true, features = ["derive"] }
 serde_json.workspace = true
-tokio = { workspace = true, features = ["fs", "io-util", "sync"] }
 
 [build-dependencies]
 anyhow.workspace = true
-async-std = { workspace = true, features = ["attributes"] }
+tokio = { workspace = true, features = ["macros", "rt-multi-thread"] }
+bindgen.workspace = true
+camino.workspace = true
 flate2.workspace = true
 fs-err.workspace = true
+indoc.workspace = true
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true, features = ["preserve_order"] }
-surf.workspace = true
+reqwest = { workspace = true, features = ["rustls-tls"] }
 tar.workspace = true
+zip.workspace = true
 
 [lints.rust]
-unsafe_code = "forbid"
+unsafe_code = "allow" # C APIのbindgen
 rust_2018_idioms = "warn"
diff --git a/crates/test_util/build.rs b/crates/test_util/build.rs
index eae3ac286..79e3bc90e 100644
--- a/crates/test_util/build.rs
+++ b/crates/test_util/build.rs
@@ -1,33 +1,94 @@
 use std::{
     env,
-    path::{Path, PathBuf},
+    io::{self, Cursor, Write as _},
+    path::Path,
 };
 
-use anyhow::ensure;
-use async_std::io::ReadExt as _;
+use anyhow::{anyhow, ensure};
+use camino::{Utf8Path, Utf8PathBuf};
 use flate2::read::GzDecoder;
+use indoc::formatdoc;
 use tar::Archive;
+use zip::{write::FileOptions, ZipWriter};
 
 #[path = "src/typing.rs"]
 mod typing;
 
 const DIC_DIR_NAME: &str = "open_jtalk_dic_utf_8-1.11";
 
-#[async_std::main]
+#[tokio::main]
 async fn main() -> anyhow::Result<()> {
-    let mut dist = PathBuf::from(env::var_os("CARGO_MANIFEST_DIR").unwrap());
-    dist.push("data");
+    let out_dir = &Utf8PathBuf::from(env::var("OUT_DIR").unwrap());
+    let dist = &Utf8Path::new(env!("CARGO_MANIFEST_DIR")).join("data");
 
     let dic_dir = dist.join(DIC_DIR_NAME);
     if !dic_dir.try_exists()? {
-        download_open_jtalk_dict(&dist).await?;
-        ensure!(dic_dir.exists(), "`{}` does not exist", dic_dir.display());
+        download_open_jtalk_dict(dist.as_ref()).await?;
+        ensure!(dic_dir.exists(), "`{dic_dir}` does not exist");
     }
 
-    generate_example_data_json(&dist)?;
+    create_sample_voice_model_file(out_dir, dist)?;
+
+    generate_example_data_json(dist.as_ref())?;
 
     println!("cargo:rerun-if-changed=build.rs");
     println!("cargo:rerun-if-changed=src/typing.rs");
+
+    generate_c_api_rs_bindings(out_dir)
+}
+
+fn create_sample_voice_model_file(out_dir: &Utf8Path, dist: &Utf8Path) -> anyhow::Result<()> {
+    const SRC: &str = "../../model/sample.vvm";
+
+    let files = fs_err::read_dir(SRC)?
+        .map(|entry| {
+            let entry = entry?;
+            let md = entry.metadata()?;
+            ensure!(!md.is_dir(), "directory in {SRC}");
+            let mtime = md.modified()?;
+            let name = entry
+                .file_name()
+                .into_string()
+                .map_err(|name| anyhow!("{name:?}"))?;
+            Ok((name, entry.path(), mtime))
+        })
+        .collect::<anyhow::Result<Vec<_>>>()?;
+
+    let output_dir = &dist.join("model");
+    let output_file = &output_dir.join("sample.vvm");
+
+    let up_to_date = fs_err::metadata(output_file)
+        .and_then(|md| md.modified())
+        .map(|t1| files.iter().all(|&(_, _, t2)| t1 >= t2));
+    let up_to_date = match up_to_date {
+        Ok(p) => p,
+        Err(e) if e.kind() == io::ErrorKind::NotFound => false,
+        Err(e) => return Err(e.into()),
+    };
+
+    if !up_to_date {
+        let mut zip = ZipWriter::new(Cursor::new(vec![]));
+        for (name, path, _) in files {
+            let content = &fs_err::read(path)?;
+            zip.start_file(name, FileOptions::default().compression_level(Some(0)))?;
+            zip.write_all(content)?;
+        }
+        let zip = zip.finish()?;
+        fs_err::create_dir_all(output_dir)?;
+        fs_err::write(output_file, zip.get_ref())?;
+    }
+
+    fs_err::write(
+        out_dir.join("sample_voice_model_file.rs"),
+        formatdoc! {"
+            pub const SAMPLE_VOICE_MODEL_FILE_PATH: &::std::primitive::str = {output_file:?};
+
+            const SAMPLE_VOICE_MODEL_FILE_C_PATH: &::std::ffi::CStr = c{output_file:?};
+            const VV_MODELS_ROOT_DIR: &::std::primitive::str = {output_dir:?};
+            ",
+        },
+    )?;
+    println!("cargo:rerun-if-changed={SRC}");
     Ok(())
 }
 
@@ -37,13 +98,11 @@ async fn download_open_jtalk_dict(dist: &Path) -> anyhow::Result<()> {
         "https://github.com/r9y9/open_jtalk/releases/download/v1.11.1/{DIC_DIR_NAME}.tar.gz"
     );
 
-    let req = surf::get(download_url);
-    let client = surf::client().with(surf::middleware::Redirect::default());
-    let mut res = client.send(req).await.map_err(surf::Error::into_inner)?;
+    let res = reqwest::get(&download_url).await?;
     ensure!(res.status() == 200, "{}", res.status());
-    let mut body_bytes = Vec::with_capacity(100 * 1024 * 1024);
-    res.read_to_end(&mut body_bytes).await?;
-    let dict_tar = GzDecoder::new(&body_bytes[..]);
+
+    let bytes = res.bytes().await?;
+    let dict_tar = GzDecoder::new(&*bytes);
 
     let mut dict_archive = Archive::new(dict_tar);
     dict_archive.unpack(dist)?;
@@ -120,3 +179,19 @@ fn generate_example_data_json(dist: &Path) -> anyhow::Result<()> {
 
     Ok(())
 }
+
+fn generate_c_api_rs_bindings(out_dir: &Utf8Path) -> anyhow::Result<()> {
+    static C_BINDINGS_PATH: &str = "../voicevox_core_c_api/include/voicevox_core.h";
+    static ADDITIONAL_C_BINDINGS_PATH: &str = "./compatible_engine.h";
+
+    bindgen::Builder::default()
+        .header(C_BINDINGS_PATH)
+        .header(ADDITIONAL_C_BINDINGS_PATH)
+        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
+        .dynamic_library_name("CApi")
+        .generate()?
+        .write_to_file(out_dir.join("c_api.rs"))?;
+    println!("cargo:rerun-if-changed={C_BINDINGS_PATH}");
+    println!("cargo:rerun-if-changed={ADDITIONAL_C_BINDINGS_PATH}");
+    Ok(())
+}
diff --git a/crates/test_util/compatible_engine.h b/crates/test_util/compatible_engine.h
new file mode 100644
index 000000000..254fd8161
--- /dev/null
+++ b/crates/test_util/compatible_engine.h
@@ -0,0 +1,28 @@
+#include <stdint.h>
+
+bool initialize(bool use_gpu, int cpu_num_threads, bool load_all_models);
+
+bool load_model(int64_t speaker_id);
+
+bool is_model_loaded(int64_t speaker_id);
+
+void finalize();
+
+const char *metas();
+
+const char *supported_devices();
+
+bool yukarin_s_forward(int64_t length, int64_t *phoneme_list,
+                       int64_t *speaker_id, float *output);
+
+bool yukarin_sa_forward(int64_t length, int64_t *vowel_phoneme_list,
+                        int64_t *consonant_phoneme_list,
+                        int64_t *start_accent_list, int64_t *end_accent_list,
+                        int64_t *start_accent_phrase_list,
+                        int64_t *end_accent_phrase_list, int64_t *speaker_id,
+                        float *output);
+
+bool decode_forward(int64_t length, int64_t phoneme_size, float *f0,
+                    float *phoneme, int64_t *speaker_id, float *output);
+
+const char *last_error_message();
diff --git a/crates/test_util/src/lib.rs b/crates/test_util/src/lib.rs
index 03e8309b8..f234d7f76 100644
--- a/crates/test_util/src/lib.rs
+++ b/crates/test_util/src/lib.rs
@@ -1,17 +1,23 @@
 mod typing;
 
-use async_zip::{base::write::ZipFileWriter, Compression, ZipEntryBuilder};
-use futures_lite::AsyncWriteExt as _;
+include!(concat!(env!("OUT_DIR"), "/sample_voice_model_file.rs"));
+
+#[allow(
+    non_camel_case_types,
+    non_snake_case,
+    non_upper_case_globals,
+    unused_extern_crates,
+    clippy::missing_safety_doc,
+    clippy::too_many_arguments
+)]
+pub mod c_api {
+    include!(concat!(env!("OUT_DIR"), "/c_api.rs"));
+
+    pub const SAMPLE_VOICE_MODEL_FILE_PATH: &std::ffi::CStr = super::SAMPLE_VOICE_MODEL_FILE_C_PATH;
+    pub const VV_MODELS_ROOT_DIR: &str = super::VV_MODELS_ROOT_DIR;
+}
+
 use once_cell::sync::Lazy;
-use std::{
-    collections::HashMap,
-    path::{Path, PathBuf},
-};
-use tokio::{
-    fs::{self, File},
-    io::AsyncReadExt,
-    sync::Mutex,
-};
 
 pub use self::typing::{
     DecodeExampleData, DurationExampleData, ExampleData, IntonationExampleData,
@@ -30,43 +36,3 @@ const EXAMPLE_DATA_JSON: &str = include_str!(concat!(
 pub static EXAMPLE_DATA: Lazy<ExampleData> = Lazy::new(|| {
     serde_json::from_str(EXAMPLE_DATA_JSON).expect("failed to parse example_data.json")
 });
-
-static PATH_MUTEX: Lazy<Mutex<HashMap<PathBuf, Mutex<()>>>> =
-    Lazy::new(|| Mutex::new(HashMap::default()));
-
-pub async fn convert_zip_vvm(dir: impl AsRef<Path>) -> PathBuf {
-    let dir = dir.as_ref();
-    let output_file_name = dir.file_name().unwrap().to_str().unwrap().to_owned() + ".vvm";
-
-    let out_file_path = PathBuf::from(env!("OUT_DIR"))
-        .join("test_data/models/")
-        .join(output_file_name);
-    let mut path_map = PATH_MUTEX.lock().await;
-    if !path_map.contains_key(&out_file_path) {
-        path_map.insert(out_file_path.clone(), Mutex::new(()));
-    }
-    let _m = path_map.get(&out_file_path).unwrap().lock().await;
-
-    if !out_file_path.exists() {
-        fs::create_dir_all(out_file_path.parent().unwrap())
-            .await
-            .unwrap();
-        let mut writer = ZipFileWriter::new(vec![]);
-
-        for entry in dir.read_dir().unwrap().flatten() {
-            let entry_builder = ZipEntryBuilder::new(
-                entry.path().file_name().unwrap().to_str().unwrap().into(),
-                Compression::Deflate,
-            );
-            let mut entry_writer = writer.write_entry_stream(entry_builder).await.unwrap();
-            let mut file = File::open(entry.path()).await.unwrap();
-            let mut buf = Vec::with_capacity(entry.metadata().unwrap().len() as usize);
-            file.read_to_end(&mut buf).await.unwrap();
-            entry_writer.write_all(&buf).await.unwrap();
-            entry_writer.close().await.unwrap();
-        }
-        let zip = writer.close().await.unwrap();
-        fs::write(&out_file_path, zip).await.unwrap();
-    }
-    out_file_path
-}
diff --git a/crates/voicevox_core/Cargo.toml b/crates/voicevox_core/Cargo.toml
index bd3456abb..5c8dd440d 100644
--- a/crates/voicevox_core/Cargo.toml
+++ b/crates/voicevox_core/Cargo.toml
@@ -32,9 +32,11 @@ open_jtalk.workspace = true
 ouroboros.workspace = true
 rayon.workspace = true
 regex.workspace = true
-serde = { workspace = true, features = ["derive"] }
+serde = { workspace = true, features = ["derive", "rc"] }
 serde_json = { workspace = true, features = ["preserve_order"] }
+serde_with.workspace = true
 smallvec.workspace = true
+strum = { workspace = true, features = ["derive"] }
 tempfile.workspace = true
 thiserror.workspace = true
 tokio = { workspace = true, features = ["rt"] } # FIXME: feature-gateする
diff --git a/crates/voicevox_core/src/__internal/doctest_fixtures.rs b/crates/voicevox_core/src/__internal/doctest_fixtures.rs
index 426f6cd09..f314845fe 100644
--- a/crates/voicevox_core/src/__internal/doctest_fixtures.rs
+++ b/crates/voicevox_core/src/__internal/doctest_fixtures.rs
@@ -1,8 +1,11 @@
+use std::path::Path;
+
 use camino::Utf8Path;
 
 use crate::{AccelerationMode, InitializeOptions};
 
 pub async fn synthesizer_with_sample_voice_model(
+    voice_model_path: impl AsRef<Path>,
     open_jtalk_dic_dir: impl AsRef<Utf8Path>,
 ) -> anyhow::Result<crate::tokio::Synthesizer<crate::tokio::OpenJtalk>> {
     let syntesizer = crate::tokio::Synthesizer::new(
@@ -13,11 +16,7 @@ pub async fn synthesizer_with_sample_voice_model(
         },
     )?;
 
-    let model = &crate::tokio::VoiceModel::from_path(concat!(
-        env!("CARGO_MANIFEST_DIR"),
-        "/../../model/sample.vvm",
-    ))
-    .await?;
+    let model = &crate::tokio::VoiceModel::from_path(voice_model_path).await?;
     syntesizer.load_voice_model(model).await?;
 
     Ok(syntesizer)
diff --git a/crates/voicevox_core/src/engine/open_jtalk.rs b/crates/voicevox_core/src/engine/open_jtalk.rs
index 1ec737f95..88d16f381 100644
--- a/crates/voicevox_core/src/engine/open_jtalk.rs
+++ b/crates/voicevox_core/src/engine/open_jtalk.rs
@@ -181,9 +181,6 @@ pub(crate) mod blocking {
         njd: ManagedResource<Njd>,
         jpcommon: ManagedResource<JpCommon>,
     }
-
-    // FIXME: open_jtalk-rs側で宣言する
-    unsafe impl Send for Resources {}
 }
 
 pub(crate) mod tokio {
diff --git a/crates/voicevox_core/src/error.rs b/crates/voicevox_core/src/error.rs
index 19d464d21..916964429 100644
--- a/crates/voicevox_core/src/error.rs
+++ b/crates/voicevox_core/src/error.rs
@@ -1,11 +1,12 @@
 use crate::{
     engine::{FullContextLabelError, KanaParseError},
     user_dict::InvalidWordError,
-    StyleId, VoiceModelId,
+    StyleId, StyleType, VoiceModelId,
 };
 //use engine::
 use duplicate::duplicate_item;
-use std::path::PathBuf;
+use itertools::Itertools as _;
+use std::{collections::BTreeSet, path::PathBuf};
 use thiserror::Error;
 use uuid::Uuid;
 
@@ -38,6 +39,7 @@ impl Error {
                 LoadModelErrorKind::ReadZipEntry { .. } => ErrorKind::ReadZipEntry,
                 LoadModelErrorKind::ModelAlreadyLoaded { .. } => ErrorKind::ModelAlreadyLoaded,
                 LoadModelErrorKind::StyleAlreadyLoaded { .. } => ErrorKind::StyleAlreadyLoaded,
+                LoadModelErrorKind::InvalidModelFormat { .. } => ErrorKind::InvalidModelFormat,
                 LoadModelErrorKind::InvalidModelData => ErrorKind::InvalidModelData,
             },
             ErrorRepr::GetSupportedDevices(_) => ErrorKind::GetSupportedDevices,
@@ -70,10 +72,14 @@ pub(crate) enum ErrorRepr {
     GetSupportedDevices(#[source] anyhow::Error),
 
     #[error(
-        "`{style_id}`に対するスタイルが見つかりませんでした。音声モデルが読み込まれていないか、読\
-         み込みが解除されています"
+        "`{style_id}` ([{style_types}])に対するスタイルが見つかりませんでした。音声モデルが\
+         読み込まれていないか、読み込みが解除されています",
+        style_types = style_types.iter().format(", ")
     )]
-    StyleNotFound { style_id: StyleId },
+    StyleNotFound {
+        style_id: StyleId,
+        style_types: &'static BTreeSet<StyleType>,
+    },
 
     #[error(
         "`{model_id}`に対する音声モデルが見つかりませんでした。読み込まれていないか、読み込みが既\
@@ -117,6 +123,8 @@ pub enum ErrorKind {
     OpenZipFile,
     /// ZIP内のファイルが読めなかった。
     ReadZipEntry,
+    /// モデルの形式が不正。
+    InvalidModelFormat,
     /// すでに読み込まれている音声モデルを読み込もうとした。
     ModelAlreadyLoaded,
     /// すでに読み込まれているスタイルを読み込もうとした。
@@ -165,6 +173,8 @@ pub(crate) enum LoadModelErrorKind {
     OpenZipFile,
     #[display(fmt = "`{filename}`を読み取れませんでした")]
     ReadZipEntry { filename: String },
+    #[display(fmt = "モデルの形式が不正です")]
+    InvalidModelFormat,
     #[display(fmt = "モデル`{id}`は既に読み込まれています")]
     ModelAlreadyLoaded { id: VoiceModelId },
     #[display(fmt = "スタイル`{id}`は既に読み込まれています")]
diff --git a/crates/voicevox_core/src/infer.rs b/crates/voicevox_core/src/infer.rs
index c816c9899..fc8954e7d 100644
--- a/crates/voicevox_core/src/infer.rs
+++ b/crates/voicevox_core/src/infer.rs
@@ -1,9 +1,9 @@
-pub(crate) mod domain;
+pub(crate) mod domains;
 mod model_file;
 pub(crate) mod runtimes;
-pub(crate) mod status;
+pub(crate) mod session_set;
 
-use std::{borrow::Cow, fmt::Debug};
+use std::{borrow::Cow, collections::BTreeSet, fmt::Debug};
 
 use derive_new::new;
 use duplicate::duplicate_item;
@@ -11,9 +11,10 @@ use enum_map::{Enum, EnumMap};
 use ndarray::{Array, ArrayD, Dimension, ShapeError};
 use thiserror::Error;
 
-use crate::SupportedDevices;
+use crate::{StyleType, SupportedDevices};
 
 pub(crate) trait InferenceRuntime: 'static {
+    // TODO: "session"とは何なのかを定め、ドキュメントを書く。`InferenceSessionSet`も同様。
     type Session: Sized + Send + 'static;
     type RunContext<'a>: From<&'a mut Self::Session> + PushInputTensor;
 
@@ -32,9 +33,17 @@ pub(crate) trait InferenceRuntime: 'static {
     fn run(ctx: Self::RunContext<'_>) -> anyhow::Result<Vec<OutputTensor>>;
 }
 
-/// ある`VoiceModel`が提供する推論操作の集合を示す。
-pub(crate) trait InferenceDomain {
+/// 共に扱われるべき推論操作の集合を示す。
+pub(crate) trait InferenceDomain: Sized {
     type Operation: InferenceOperation;
+
+    /// 対応する`StyleType`。
+    ///
+    /// 複数の`InferenceDomain`に対応する`StyleType`があってもよい。
+    ///
+    /// また、どの`InferenceDomain`にも属さない`StyleType`があってもよい。そのような`StyleType`は
+    /// 音声モデルのロード時に単に拒否されるべきである。
+    fn style_types() -> &'static BTreeSet<StyleType>;
 }
 
 /// `InferenceDomain`の推論操作を表す列挙型。
diff --git a/crates/voicevox_core/src/infer/domains.rs b/crates/voicevox_core/src/infer/domains.rs
new file mode 100644
index 000000000..687550399
--- /dev/null
+++ b/crates/voicevox_core/src/infer/domains.rs
@@ -0,0 +1,22 @@
+mod talk;
+
+pub(crate) use self::talk::{
+    DecodeInput, DecodeOutput, PredictDurationInput, PredictDurationOutput, PredictIntonationInput,
+    PredictIntonationOutput, TalkDomain, TalkOperation,
+};
+
+pub(crate) struct InferenceDomainMap<V: InferenceDomainMapValues + ?Sized> {
+    pub(crate) talk: V::Talk,
+}
+
+pub(crate) trait InferenceDomainMapValues {
+    type Talk;
+}
+
+impl<T> InferenceDomainMapValues for (T,) {
+    type Talk = T;
+}
+
+impl<A> InferenceDomainMapValues for [A] {
+    type Talk = A;
+}
diff --git a/crates/voicevox_core/src/infer/domain.rs b/crates/voicevox_core/src/infer/domains/talk.rs
similarity index 82%
rename from crates/voicevox_core/src/infer/domain.rs
rename to crates/voicevox_core/src/infer/domains/talk.rs
index bb83886dd..e0716fa50 100644
--- a/crates/voicevox_core/src/infer/domain.rs
+++ b/crates/voicevox_core/src/infer/domains/talk.rs
@@ -1,22 +1,32 @@
+use std::collections::BTreeSet;
+
 use enum_map::Enum;
 use macros::{InferenceInputSignature, InferenceOperation, InferenceOutputSignature};
 use ndarray::{Array0, Array1, Array2};
+use once_cell::sync::Lazy;
+
+use crate::StyleType;
 
-use super::{
+use super::super::{
     InferenceDomain, InferenceInputSignature as _, InferenceOutputSignature as _, OutputTensor,
 };
 
-pub(crate) enum InferenceDomainImpl {}
+pub(crate) enum TalkDomain {}
+
+impl InferenceDomain for TalkDomain {
+    type Operation = TalkOperation;
 
-impl InferenceDomain for InferenceDomainImpl {
-    type Operation = InferenceOperationImpl;
+    fn style_types() -> &'static BTreeSet<StyleType> {
+        static STYLE_TYPES: Lazy<BTreeSet<StyleType>> = Lazy::new(|| [StyleType::Talk].into());
+        &STYLE_TYPES
+    }
 }
 
 #[derive(Clone, Copy, Enum, InferenceOperation)]
 #[inference_operation(
-    type Domain = InferenceDomainImpl;
+    type Domain = TalkDomain;
 )]
-pub(crate) enum InferenceOperationImpl {
+pub(crate) enum TalkOperation {
     #[inference_operation(
         type Input = PredictDurationInput;
         type Output = PredictDurationOutput;
diff --git a/crates/voicevox_core/src/infer/session_set.rs b/crates/voicevox_core/src/infer/session_set.rs
new file mode 100644
index 000000000..56d570f98
--- /dev/null
+++ b/crates/voicevox_core/src/infer/session_set.rs
@@ -0,0 +1,102 @@
+use std::{collections::HashMap, fmt::Display, marker::PhantomData, sync::Arc};
+
+use anyhow::bail;
+use enum_map::{Enum as _, EnumMap};
+use itertools::Itertools as _;
+
+use crate::error::ErrorRepr;
+
+use super::{
+    model_file, InferenceDomain, InferenceInputSignature, InferenceOperation, InferenceRuntime,
+    InferenceSessionOptions, InferenceSignature, ParamInfo,
+};
+
+pub(crate) struct InferenceSessionSet<R: InferenceRuntime, D: InferenceDomain>(
+    EnumMap<D::Operation, Arc<std::sync::Mutex<R::Session>>>,
+);
+
+impl<R: InferenceRuntime, D: InferenceDomain> InferenceSessionSet<R, D> {
+    pub(crate) fn new(
+        model_bytes: &EnumMap<D::Operation, Vec<u8>>,
+        options: &EnumMap<D::Operation, InferenceSessionOptions>,
+    ) -> anyhow::Result<Self> {
+        let mut sessions = model_bytes
+            .iter()
+            .map(|(op, model_bytes)| {
+                let (expected_input_param_infos, expected_output_param_infos) =
+                    <D::Operation as InferenceOperation>::PARAM_INFOS[op];
+
+                let (sess, actual_input_param_infos, actual_output_param_infos) =
+                    R::new_session(|| model_file::decrypt(model_bytes), options[op])?;
+
+                check_param_infos(expected_input_param_infos, &actual_input_param_infos)?;
+                check_param_infos(expected_output_param_infos, &actual_output_param_infos)?;
+
+                Ok((op.into_usize(), std::sync::Mutex::new(sess).into()))
+            })
+            .collect::<anyhow::Result<HashMap<_, _>>>()?;
+
+        return Ok(Self(EnumMap::<D::Operation, _>::from_fn(|k| {
+            sessions.remove(&k.into_usize()).expect("should exist")
+        })));
+
+        fn check_param_infos<D: PartialEq + Display>(
+            expected: &[ParamInfo<D>],
+            actual: &[ParamInfo<D>],
+        ) -> anyhow::Result<()> {
+            if !(expected.len() == actual.len()
+                && itertools::zip_eq(expected, actual)
+                    .all(|(expected, actual)| expected.accepts(actual)))
+            {
+                let expected = display_param_infos(expected);
+                let actual = display_param_infos(actual);
+                bail!("expected {{{expected}}}, got {{{actual}}}")
+            }
+            Ok(())
+        }
+
+        fn display_param_infos(infos: &[ParamInfo<impl Display>]) -> impl Display {
+            infos
+                .iter()
+                .map(|ParamInfo { name, dt, ndim }| {
+                    let brackets = match *ndim {
+                        Some(ndim) => "[]".repeat(ndim),
+                        None => "[]...".to_owned(),
+                    };
+                    format!("{name}: {dt}{brackets}")
+                })
+                .join(", ")
+        }
+    }
+}
+
+impl<R: InferenceRuntime, D: InferenceDomain> InferenceSessionSet<R, D> {
+    pub(crate) fn get<I>(&self) -> InferenceSessionCell<R, I>
+    where
+        I: InferenceInputSignature,
+        I::Signature: InferenceSignature<Domain = D>,
+    {
+        InferenceSessionCell {
+            inner: self.0[I::Signature::OPERATION].clone(),
+            marker: PhantomData,
+        }
+    }
+}
+
+pub(crate) struct InferenceSessionCell<R: InferenceRuntime, I> {
+    inner: Arc<std::sync::Mutex<R::Session>>,
+    marker: PhantomData<fn(I)>,
+}
+
+impl<R: InferenceRuntime, I: InferenceInputSignature> InferenceSessionCell<R, I> {
+    pub(crate) fn run(
+        self,
+        input: I,
+    ) -> crate::Result<<I::Signature as InferenceSignature>::Output> {
+        let inner = &mut self.inner.lock().unwrap();
+        let ctx = input.make_run_context::<R>(inner);
+        R::run(ctx)
+            .and_then(TryInto::try_into)
+            .map_err(|e| ErrorRepr::InferenceFailed(e).into())
+    }
+}
diff --git a/crates/voicevox_core/src/infer/status.rs b/crates/voicevox_core/src/infer/status.rs
deleted file mode 100644
index 2a575153d..000000000
--- a/crates/voicevox_core/src/infer/status.rs
+++ /dev/null
@@ -1,429 +0,0 @@
-use std::{
-    collections::{BTreeMap, HashMap},
-    fmt::Display,
-    marker::PhantomData,
-    sync::Arc,
-};
-
-use anyhow::bail;
-use educe::Educe;
-use enum_map::{Enum as _, EnumMap};
-use indexmap::IndexMap;
-use itertools::{iproduct, Itertools as _};
-
-use crate::{
-    error::{ErrorRepr, LoadModelError, LoadModelErrorKind, LoadModelResult},
-    infer::{InferenceOperation, ParamInfo},
-    manifest::ModelInnerId,
-    metas::{self, SpeakerMeta, StyleId, StyleMeta, VoiceModelMeta},
-    voice_model::{VoiceModelHeader, VoiceModelId},
-    Result,
-};
-
-use super::{
-    model_file, InferenceDomain, InferenceInputSignature, InferenceRuntime,
-    InferenceSessionOptions, InferenceSignature,
-};
-
-pub(crate) struct Status<R: InferenceRuntime, D: InferenceDomain> {
-    loaded_models: std::sync::Mutex<LoadedModels<R, D>>,
-    session_options: EnumMap<D::Operation, InferenceSessionOptions>,
-}
-
-impl<R: InferenceRuntime, D: InferenceDomain> Status<R, D> {
-    pub(crate) fn new(session_options: EnumMap<D::Operation, InferenceSessionOptions>) -> Self {
-        Self {
-            loaded_models: Default::default(),
-            session_options,
-        }
-    }
-
-    pub(crate) fn insert_model(
-        &self,
-        model_header: &VoiceModelHeader,
-        model_bytes: &EnumMap<D::Operation, Vec<u8>>,
-    ) -> Result<()> {
-        self.loaded_models
-            .lock()
-            .unwrap()
-            .ensure_acceptable(model_header)?;
-
-        let session_set =
-            SessionSet::new(model_bytes, &self.session_options).map_err(|source| {
-                LoadModelError {
-                    path: model_header.path.clone(),
-                    context: LoadModelErrorKind::InvalidModelData,
-                    source: Some(source),
-                }
-            })?;
-
-        self.loaded_models
-            .lock()
-            .unwrap()
-            .insert(model_header, session_set)?;
-        Ok(())
-    }
-
-    pub(crate) fn unload_model(&self, voice_model_id: &VoiceModelId) -> Result<()> {
-        self.loaded_models.lock().unwrap().remove(voice_model_id)
-    }
-
-    pub(crate) fn metas(&self) -> VoiceModelMeta {
-        self.loaded_models.lock().unwrap().metas()
-    }
-
-    pub(crate) fn ids_for(&self, style_id: StyleId) -> Result<(VoiceModelId, ModelInnerId)> {
-        self.loaded_models.lock().unwrap().ids_for(style_id)
-    }
-
-    pub(crate) fn is_loaded_model(&self, voice_model_id: &VoiceModelId) -> bool {
-        self.loaded_models
-            .lock()
-            .unwrap()
-            .contains_voice_model(voice_model_id)
-    }
-
-    pub(crate) fn is_loaded_model_by_style_id(&self, style_id: StyleId) -> bool {
-        self.loaded_models.lock().unwrap().contains_style(style_id)
-    }
-
-    pub(crate) fn validate_speaker_id(&self, style_id: StyleId) -> bool {
-        self.is_loaded_model_by_style_id(style_id)
-    }
-
-    /// 推論を実行する。
-    ///
-    /// # Performance
-    ///
-    /// CPU/GPU-boundな操作であるため、非同期ランタイム上では直接実行されるべきではない。
-    ///
-    /// # Panics
-    ///
-    /// `self`が`model_id`を含んでいないとき、パニックする。
-    pub(crate) fn run_session<I>(
-        &self,
-        model_id: &VoiceModelId,
-        input: I,
-    ) -> Result<<I::Signature as InferenceSignature>::Output>
-    where
-        I: InferenceInputSignature,
-        I::Signature: InferenceSignature<Domain = D>,
-    {
-        let sess = self.loaded_models.lock().unwrap().get(model_id);
-        sess.run(input)
-    }
-}
-
-/// 読み込んだモデルの`Session`とそのメタ情報を保有し、追加/削除/取得の操作を提供する。
-///
-/// この構造体のメソッドは、すべて一瞬で完了すべきである。
-#[derive(Educe)]
-#[educe(Default(bound = "R: InferenceRuntime, D: InferenceDomain"))]
-struct LoadedModels<R: InferenceRuntime, D: InferenceDomain>(
-    IndexMap<VoiceModelId, LoadedModel<R, D>>,
-);
-
-struct LoadedModel<R: InferenceRuntime, D: InferenceDomain> {
-    model_inner_ids: BTreeMap<StyleId, ModelInnerId>,
-    metas: VoiceModelMeta,
-    session_set: SessionSet<R, D>,
-}
-
-impl<R: InferenceRuntime, D: InferenceDomain> LoadedModels<R, D> {
-    fn metas(&self) -> VoiceModelMeta {
-        metas::merge(self.0.values().flat_map(|LoadedModel { metas, .. }| metas))
-    }
-
-    fn ids_for(&self, style_id: StyleId) -> Result<(VoiceModelId, ModelInnerId)> {
-        let (
-            model_id,
-            LoadedModel {
-                model_inner_ids, ..
-            },
-        ) = self
-            .0
-            .iter()
-            .find(|(_, LoadedModel { metas, .. })| {
-                metas
-                    .iter()
-                    .flat_map(SpeakerMeta::styles)
-                    .any(|style| *style.id() == style_id)
-            })
-            .ok_or(ErrorRepr::StyleNotFound { style_id })?;
-
-        let model_inner_id = *model_inner_ids
-            .get(&style_id)
-            .expect("`model_inner_ids` should contains all of the style IDs in the model");
-
-        Ok((model_id.clone(), model_inner_id))
-    }
-
-    /// # Panics
-    ///
-    /// `self`が`model_id`を含んでいないとき、パニックする。
-    fn get<I>(&self, model_id: &VoiceModelId) -> SessionCell<R, I>
-    where
-        I: InferenceInputSignature,
-        I::Signature: InferenceSignature<Domain = D>,
-    {
-        self.0[model_id].session_set.get()
-    }
-
-    fn contains_voice_model(&self, model_id: &VoiceModelId) -> bool {
-        self.0.contains_key(model_id)
-    }
-
-    fn contains_style(&self, style_id: StyleId) -> bool {
-        self.styles().any(|style| *style.id() == style_id)
-    }
-
-    /// 音声モデルを受け入れ可能かをチェックする。
-    ///
-    /// # Errors
-    ///
-    /// 次の場合にエラーを返す。
-    ///
-    /// - 音声モデルIDかスタイルIDが`model_header`と重複するとき
-    fn ensure_acceptable(&self, model_header: &VoiceModelHeader) -> LoadModelResult<()> {
-        let error = |context| LoadModelError {
-            path: model_header.path.clone(),
-            context,
-            source: None,
-        };
-
-        let loaded = self.speakers();
-        let external = model_header.metas.iter();
-        for (loaded, external) in iproduct!(loaded, external) {
-            if loaded.speaker_uuid() == external.speaker_uuid() {
-                loaded.warn_diff_except_styles(external);
-            }
-        }
-
-        let loaded = self.styles();
-        let external = model_header
-            .metas
-            .iter()
-            .flat_map(|speaker| speaker.styles());
-        if self.0.contains_key(&model_header.id) {
-            return Err(error(LoadModelErrorKind::ModelAlreadyLoaded {
-                id: model_header.id.clone(),
-            }));
-        }
-        if let Some((style, _)) =
-            iproduct!(loaded, external).find(|(loaded, external)| loaded.id() == external.id())
-        {
-            return Err(error(LoadModelErrorKind::StyleAlreadyLoaded {
-                id: *style.id(),
-            }));
-        }
-        Ok(())
-    }
-
-    fn insert(
-        &mut self,
-        model_header: &VoiceModelHeader,
-        session_set: SessionSet<R, D>,
-    ) -> Result<()> {
-        self.ensure_acceptable(model_header)?;
-
-        let prev = self.0.insert(
-            model_header.id.clone(),
-            LoadedModel {
-                model_inner_ids: model_header.model_inner_ids(),
-                metas: model_header.metas.clone(),
-                session_set,
-            },
-        );
-        assert!(prev.is_none());
-        Ok(())
-    }
-
-    fn remove(&mut self, model_id: &VoiceModelId) -> Result<()> {
-        if self.0.remove(model_id).is_none() {
-            return Err(ErrorRepr::ModelNotFound {
-                model_id: model_id.clone(),
-            }
-            .into());
-        }
-        Ok(())
-    }
-
-    fn speakers(&self) -> impl Iterator<Item = &SpeakerMeta> + Clone {
-        self.0.values().flat_map(|LoadedModel { metas, .. }| metas)
-    }
-
-    fn styles(&self) -> impl Iterator<Item = &StyleMeta> {
-        self.speakers().flat_map(|speaker| speaker.styles())
-    }
-}
-
-struct SessionSet<R: InferenceRuntime, D: InferenceDomain>(
-    EnumMap<D::Operation, Arc<std::sync::Mutex<R::Session>>>,
-);
-
-impl<R: InferenceRuntime, D: InferenceDomain> SessionSet<R, D> {
-    fn new(
-        model_bytes: &EnumMap<D::Operation, Vec<u8>>,
-        options: &EnumMap<D::Operation, InferenceSessionOptions>,
-    ) -> anyhow::Result<Self> {
-        let mut sessions = model_bytes
-            .iter()
-            .map(|(op, model_bytes)| {
-                let (expected_input_param_infos, expected_output_param_infos) =
-                    <D::Operation as InferenceOperation>::PARAM_INFOS[op];
-
-                let (sess, actual_input_param_infos, actual_output_param_infos) =
-                    R::new_session(|| model_file::decrypt(model_bytes), options[op])?;
-
-                check_param_infos(expected_input_param_infos, &actual_input_param_infos)?;
-                check_param_infos(expected_output_param_infos, &actual_output_param_infos)?;
-
-                Ok((op.into_usize(), std::sync::Mutex::new(sess).into()))
-            })
-            .collect::<anyhow::Result<HashMap<_, _>>>()?;
-
-        return Ok(Self(EnumMap::<D::Operation, _>::from_fn(|k| {
-            sessions.remove(&k.into_usize()).expect("should exist")
-        })));
-
-        fn check_param_infos<D: PartialEq + Display>(
-            expected: &[ParamInfo<D>],
-            actual: &[ParamInfo<D>],
-        ) -> anyhow::Result<()> {
-            if !(expected.len() == actual.len()
-                && itertools::zip_eq(expected, actual)
-                    .all(|(expected, actual)| expected.accepts(actual)))
-            {
-                let expected = display_param_infos(expected);
-                let actual = display_param_infos(actual);
-                bail!("expected {{{expected}}}, got {{{actual}}}")
-            }
-            Ok(())
-        }
-
-        fn display_param_infos(infos: &[ParamInfo<impl Display>]) -> impl Display {
-            infos
-                .iter()
-                .map(|ParamInfo { name, dt, ndim }| {
-                    let brackets = match *ndim {
-                        Some(ndim) => "[]".repeat(ndim),
-                        None => "[]...".to_owned(),
-                    };
-                    format!("{name}: {dt}{brackets}")
-                })
-                .join(", ")
-        }
-    }
-}
-
-impl<R: InferenceRuntime, D: InferenceDomain> SessionSet<R, D> {
-    fn get<I>(&self) -> SessionCell<R, I>
-    where
-        I: InferenceInputSignature,
-        I::Signature: InferenceSignature<Domain = D>,
-    {
-        SessionCell {
-            inner: self.0[I::Signature::OPERATION].clone(),
-            marker: PhantomData,
-        }
-    }
-}
-
-struct SessionCell<R: InferenceRuntime, I> {
-    inner: Arc<std::sync::Mutex<R::Session>>,
-    marker: PhantomData<fn(I)>,
-}
-
-impl<R: InferenceRuntime, I: InferenceInputSignature> SessionCell<R, I> {
-    fn run(self, input: I) -> crate::Result<<I::Signature as InferenceSignature>::Output> {
-        let inner = &mut self.inner.lock().unwrap();
-        let ctx = input.make_run_context::<R>(inner);
-        R::run(ctx)
-            .and_then(TryInto::try_into)
-            .map_err(|e| ErrorRepr::InferenceFailed(e).into())
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use enum_map::enum_map;
-    use pretty_assertions::assert_eq;
-    use rstest::rstest;
-
-    use crate::{
-        infer::domain::{InferenceDomainImpl, InferenceOperationImpl},
-        macros::tests::assert_debug_fmt_eq,
-        synthesizer::InferenceRuntimeImpl,
-        test_util::open_default_vvm_file,
-    };
-
-    use super::{super::InferenceSessionOptions, Status};
-
-    #[rstest]
-    #[case(true, 0)]
-    #[case(true, 1)]
-    #[case(true, 8)]
-    #[case(false, 2)]
-    #[case(false, 4)]
-    #[case(false, 8)]
-    #[case(false, 0)]
-    fn status_new_works(#[case] use_gpu: bool, #[case] cpu_num_threads: u16) {
-        let light_session_options = InferenceSessionOptions::new(cpu_num_threads, false);
-        let heavy_session_options = InferenceSessionOptions::new(cpu_num_threads, use_gpu);
-        let session_options = enum_map! {
-            InferenceOperationImpl::PredictDuration
-            | InferenceOperationImpl::PredictIntonation => light_session_options,
-            InferenceOperationImpl::Decode => heavy_session_options,
-        };
-        let status = Status::<InferenceRuntimeImpl, InferenceDomainImpl>::new(session_options);
-
-        assert_eq!(
-            light_session_options,
-            status.session_options[InferenceOperationImpl::PredictDuration],
-        );
-        assert_eq!(
-            light_session_options,
-            status.session_options[InferenceOperationImpl::PredictIntonation],
-        );
-        assert_eq!(
-            heavy_session_options,
-            status.session_options[InferenceOperationImpl::Decode],
-        );
-
-        assert!(status.loaded_models.lock().unwrap().0.is_empty());
-    }
-
-    #[rstest]
-    #[tokio::test]
-    async fn status_load_model_works() {
-        let status = Status::<InferenceRuntimeImpl, InferenceDomainImpl>::new(
-            enum_map!(_ => InferenceSessionOptions::new(0, false)),
-        );
-        let model = &open_default_vvm_file().await;
-        let model_bytes = &model.read_inference_models().await.unwrap();
-        let result = status.insert_model(model.header(), model_bytes);
-        assert_debug_fmt_eq!(Ok(()), result);
-        assert_eq!(1, status.loaded_models.lock().unwrap().0.len());
-    }
-
-    #[rstest]
-    #[tokio::test]
-    async fn status_is_model_loaded_works() {
-        let status = Status::<InferenceRuntimeImpl, InferenceDomainImpl>::new(
-            enum_map!(_ => InferenceSessionOptions::new(0, false)),
-        );
-        let vvm = open_default_vvm_file().await;
-        let model_header = vvm.header();
-        let model_bytes = &vvm.read_inference_models().await.unwrap();
-        assert!(
-            !status.is_loaded_model(&model_header.id),
-            "model should  not be loaded"
-        );
-        let result = status.insert_model(model_header, model_bytes);
-        assert_debug_fmt_eq!(Ok(()), result);
-        assert!(
-            status.is_loaded_model(&model_header.id),
-            "model should be loaded",
-        );
-    }
-}
diff --git a/crates/voicevox_core/src/lib.rs b/crates/voicevox_core/src/lib.rs
index 29efba8f1..0f34c5962 100644
--- a/crates/voicevox_core/src/lib.rs
+++ b/crates/voicevox_core/src/lib.rs
@@ -9,6 +9,7 @@ mod macros;
 mod manifest;
 mod metas;
 mod result;
+mod status;
 mod synthesizer;
 mod task;
 mod text_analyzer;
@@ -33,7 +34,8 @@ pub use self::{
     engine::{AccentPhraseModel, AudioQueryModel, FullcontextExtractor},
     error::{Error, ErrorKind},
     metas::{
-        RawStyleId, RawStyleVersion, SpeakerMeta, StyleId, StyleMeta, StyleVersion, VoiceModelMeta,
+        RawStyleId, RawStyleVersion, SpeakerMeta, StyleId, StyleMeta, StyleType, StyleVersion,
+        VoiceModelMeta,
     },
     result::Result,
     synthesizer::{AccelerationMode, InitializeOptions, SynthesisOptions, TtsOptions},
diff --git a/crates/voicevox_core/src/manifest.rs b/crates/voicevox_core/src/manifest.rs
index 650e151d5..3b17ae3f1 100644
--- a/crates/voicevox_core/src/manifest.rs
+++ b/crates/voicevox_core/src/manifest.rs
@@ -1,8 +1,10 @@
-use std::{collections::BTreeMap, fmt::Display};
+use std::{collections::BTreeMap, fmt::Display, sync::Arc};
 
 use derive_getters::Getters;
+use derive_more::Deref;
 use derive_new::new;
 use serde::{Deserialize, Serialize};
+use serde_with::{serde_as, DisplayFromStr};
 
 use crate::StyleId;
 
@@ -41,9 +43,27 @@ pub struct Manifest {
     #[allow(dead_code)]
     manifest_version: ManifestVersion,
     metas_filename: String,
-    decode_filename: String,
-    predict_duration_filename: String,
-    predict_intonation_filename: String,
+    #[serde(flatten)]
+    domains: ManifestDomains,
+}
+
+#[derive(Deserialize, Clone)]
+pub(crate) struct ManifestDomains {
+    pub(crate) talk: Option<TalkManifest>,
+}
+
+#[derive(Deserialize, Clone)]
+pub(crate) struct TalkManifest {
+    pub(crate) predict_duration_filename: String,
+    pub(crate) predict_intonation_filename: String,
+    pub(crate) decode_filename: String,
     #[serde(default)]
-    style_id_to_model_inner_id: BTreeMap<StyleId, ModelInnerId>,
+    pub(crate) style_id_to_model_inner_id: StyleIdToModelInnerId,
 }
+
+#[serde_as]
+#[derive(Default, Clone, Deref, Deserialize)]
+#[deref(forward)]
+pub(crate) struct StyleIdToModelInnerId(
+    #[serde_as(as = "Arc<BTreeMap<DisplayFromStr, _>>")] Arc<BTreeMap<StyleId, ModelInnerId>>,
+);
diff --git a/crates/voicevox_core/src/metas.rs b/crates/voicevox_core/src/metas.rs
index 78314d52a..b9f274c48 100644
--- a/crates/voicevox_core/src/metas.rs
+++ b/crates/voicevox_core/src/metas.rs
@@ -49,7 +49,20 @@ pub type RawStyleId = u32;
 ///
 /// [**話者**(_speaker_)]: SpeakerMeta
 /// [**スタイル**(_style_)]: StyleMeta
-#[derive(PartialEq, Eq, Clone, Copy, Ord, Hash, PartialOrd, Deserialize, Serialize, new, Debug)]
+#[derive(
+    PartialEq,
+    Eq,
+    Clone,
+    Copy,
+    Ord,
+    Hash,
+    PartialOrd,
+    derive_more::FromStr,
+    Deserialize,
+    Serialize,
+    new,
+    Debug,
+)]
 pub struct StyleId(RawStyleId);
 
 impl StyleId {
@@ -154,12 +167,47 @@ pub struct StyleMeta {
     id: StyleId,
     /// スタイル名。
     name: String,
+    /// スタイルに対応するモデルの種類。
+    #[serde(default)]
+    r#type: StyleType,
     /// スタイルの順番。
     ///
     /// [`SpeakerMeta::styles`]は、この値に対して昇順に並んでいるべきである。
     order: Option<u32>,
 }
 
+/// **スタイル**(_style_)に対応するモデルの種類。
+#[derive(
+    Default,
+    Clone,
+    Copy,
+    PartialEq,
+    Eq,
+    PartialOrd,
+    Ord,
+    Hash,
+    Debug,
+    strum::Display,
+    Deserialize,
+    Serialize,
+)]
+#[strum(serialize_all = "snake_case")]
+#[serde(rename_all = "snake_case")]
+pub enum StyleType {
+    /// 音声合成クエリの作成と音声合成が可能。
+    #[default]
+    Talk,
+
+    /// 歌唱音声合成用のクエリの作成が可能。
+    SingingTeacher,
+
+    /// 歌唱音声合成が可能。
+    FrameDecode,
+
+    /// 歌唱音声合成用のクエリの作成と歌唱音声合成が可能。
+    Sing,
+}
+
 #[cfg(test)]
 mod tests {
     use once_cell::sync::Lazy;
@@ -175,6 +223,7 @@ mod tests {
                         {
                             "id": 3,
                             "name": "B_1",
+                            "type": "talk",
                             "order": 0
                         }
                     ],
@@ -188,6 +237,7 @@ mod tests {
                         {
                             "id": 2,
                             "name": "A_3",
+                            "type": "talk",
                             "order": 2
                         }
                     ],
@@ -201,11 +251,13 @@ mod tests {
                         {
                             "id": 1,
                             "name": "A_1",
+                            "type": "talk",
                             "order": 0
                         },
                         {
                             "id": 0,
                             "name": "A_2",
+                            "type": "talk",
                             "order": 1
                         }
                     ],
@@ -224,16 +276,19 @@ mod tests {
                         {
                             "id": 1,
                             "name": "A_1",
+                            "type": "talk",
                             "order": 0
                         },
                         {
                             "id": 0,
                             "name": "A_2",
+                            "type": "talk",
                             "order": 1
                         },
                         {
                             "id": 2,
                             "name": "A_3",
+                            "type": "talk",
                             "order": 2
                         }
                     ],
@@ -247,6 +302,7 @@ mod tests {
                         {
                             "id": 3,
                             "name": "B_1",
+                            "type": "talk",
                             "order": 0
                         }
                     ],
diff --git a/crates/voicevox_core/src/status.rs b/crates/voicevox_core/src/status.rs
new file mode 100644
index 000000000..a47de689b
--- /dev/null
+++ b/crates/voicevox_core/src/status.rs
@@ -0,0 +1,428 @@
+use std::any;
+
+use duplicate::{duplicate, duplicate_item};
+use educe::Educe;
+use enum_map::EnumMap;
+use indexmap::IndexMap;
+use itertools::iproduct;
+
+use crate::{
+    error::{ErrorRepr, LoadModelError, LoadModelErrorKind, LoadModelResult},
+    infer::{
+        domains::{InferenceDomainMap, TalkDomain, TalkOperation},
+        session_set::{InferenceSessionCell, InferenceSessionSet},
+        InferenceDomain, InferenceInputSignature, InferenceRuntime, InferenceSessionOptions,
+        InferenceSignature,
+    },
+    manifest::{ModelInnerId, StyleIdToModelInnerId},
+    metas::{self, SpeakerMeta, StyleId, StyleMeta, VoiceModelMeta},
+    voice_model::{ModelBytesWithInnerIdsByDomain, VoiceModelHeader, VoiceModelId},
+    Result,
+};
+
+pub(crate) struct Status<R: InferenceRuntime> {
+    loaded_models: std::sync::Mutex<LoadedModels<R>>,
+    session_options: InferenceDomainMap<SessionOptionsByDomain>,
+}
+
+impl<R: InferenceRuntime> Status<R> {
+    pub(crate) fn new(session_options: InferenceDomainMap<SessionOptionsByDomain>) -> Self {
+        Self {
+            loaded_models: Default::default(),
+            session_options,
+        }
+    }
+
+    pub(crate) fn insert_model(
+        &self,
+        model_header: &VoiceModelHeader,
+        model_contents: &InferenceDomainMap<ModelBytesWithInnerIdsByDomain>,
+    ) -> Result<()> {
+        self.loaded_models
+            .lock()
+            .unwrap()
+            .ensure_acceptable(model_header)?;
+
+        let session_sets_with_inner_ids = model_contents
+            .create_session_sets(&self.session_options)
+            .map_err(|source| LoadModelError {
+                path: model_header.path.clone(),
+                context: LoadModelErrorKind::InvalidModelData,
+                source: Some(source),
+            })?;
+
+        self.loaded_models
+            .lock()
+            .unwrap()
+            .insert(model_header, session_sets_with_inner_ids)?;
+        Ok(())
+    }
+
+    pub(crate) fn unload_model(&self, voice_model_id: &VoiceModelId) -> Result<()> {
+        self.loaded_models.lock().unwrap().remove(voice_model_id)
+    }
+
+    pub(crate) fn metas(&self) -> VoiceModelMeta {
+        self.loaded_models.lock().unwrap().metas()
+    }
+
+    /// あるスタイルに対応する`VoiceModelId`と`ModelInnerId`の組を返す。
+    ///
+    /// `StyleId` → `ModelInnerId`のマッピングが存在しない場合は、`ModelInnerId`としては
+    /// `style_id`と同じ値を返す。
+    pub(crate) fn ids_for<D: InferenceDomainExt>(
+        &self,
+        style_id: StyleId,
+    ) -> Result<(VoiceModelId, ModelInnerId)> {
+        self.loaded_models.lock().unwrap().ids_for::<D>(style_id)
+    }
+
+    pub(crate) fn is_loaded_model(&self, voice_model_id: &VoiceModelId) -> bool {
+        self.loaded_models
+            .lock()
+            .unwrap()
+            .contains_voice_model(voice_model_id)
+    }
+
+    // FIXME: この関数はcompatible_engineとテストでのみ使われるが、テストのために`StyleType`を
+    // 引数に含めるようにする
+    pub(crate) fn is_loaded_model_by_style_id(&self, style_id: StyleId) -> bool {
+        self.loaded_models.lock().unwrap().contains_style(style_id)
+    }
+
+    /// 推論を実行する。
+    ///
+    /// # Performance
+    ///
+    /// CPU/GPU-boundな操作であるため、非同期ランタイム上では直接実行されるべきではない。
+    ///
+    /// # Panics
+    ///
+    /// `self`が`model_id`を含んでいないとき、パニックする。
+    pub(crate) fn run_session<I>(
+        &self,
+        model_id: &VoiceModelId,
+        input: I,
+    ) -> Result<<I::Signature as InferenceSignature>::Output>
+    where
+        I: InferenceInputSignature,
+        <I::Signature as InferenceSignature>::Domain: InferenceDomainExt,
+    {
+        let sess = self.loaded_models.lock().unwrap().get(model_id);
+        sess.run(input)
+    }
+}
+
+/// 読み込んだモデルの`Session`とそのメタ情報を保有し、追加/削除/取得の操作を提供する。
+///
+/// この構造体のメソッドは、すべて一瞬で完了すべきである。
+#[derive(Educe)]
+#[educe(Default(bound = "R: InferenceRuntime"))]
+struct LoadedModels<R: InferenceRuntime>(IndexMap<VoiceModelId, LoadedModel<R>>);
+
+struct LoadedModel<R: InferenceRuntime> {
+    metas: VoiceModelMeta,
+    session_sets_with_inner_ids: InferenceDomainMap<SessionSetsWithInnerIdsByDomain<R>>,
+}
+
+impl<R: InferenceRuntime> LoadedModels<R> {
+    fn metas(&self) -> VoiceModelMeta {
+        metas::merge(self.0.values().flat_map(|LoadedModel { metas, .. }| metas))
+    }
+
+    fn ids_for<D: InferenceDomainExt>(
+        &self,
+        style_id: StyleId,
+    ) -> Result<(VoiceModelId, ModelInnerId)> {
+        let (
+            model_id,
+            LoadedModel {
+                session_sets_with_inner_ids,
+                ..
+            },
+        ) = self
+            .0
+            .iter()
+            .find(|(_, LoadedModel { metas, .. })| {
+                metas.iter().flat_map(SpeakerMeta::styles).any(|style| {
+                    *style.id() == style_id && D::style_types().contains(style.r#type())
+                })
+            })
+            .ok_or(ErrorRepr::StyleNotFound {
+                style_id,
+                style_types: D::style_types(),
+            })?;
+
+        let model_inner_id = session_sets_with_inner_ids
+            .get::<D>()
+            .as_ref()
+            .and_then(|(model_inner_ids, _)| model_inner_ids.get(&style_id).copied())
+            .unwrap_or_else(|| ModelInnerId::new(style_id.raw_id()));
+
+        Ok((model_id.clone(), model_inner_id))
+    }
+
+    /// # Panics
+    ///
+    /// 次の場合にパニックする。
+    ///
+    /// - `self`が`model_id`を含んでいないとき
+    /// - 対応する`InferenceDomain`が欠けているとき
+    fn get<I>(&self, model_id: &VoiceModelId) -> InferenceSessionCell<R, I>
+    where
+        I: InferenceInputSignature,
+        <I::Signature as InferenceSignature>::Domain: InferenceDomainExt,
+    {
+        let (_, session_set) = self.0[model_id]
+            .session_sets_with_inner_ids
+            .get::<<I::Signature as InferenceSignature>::Domain>()
+            .as_ref()
+            .unwrap_or_else(|| {
+                let type_name = any::type_name::<<I::Signature as InferenceSignature>::Domain>()
+                    .split("::")
+                    .last()
+                    .unwrap();
+                panic!(
+                    "missing session set for `{type_name}` (should be checked in \
+                     `VoiceModelHeader::new` and `ids_for`)",
+                );
+            });
+        session_set.get()
+    }
+
+    fn contains_voice_model(&self, model_id: &VoiceModelId) -> bool {
+        self.0.contains_key(model_id)
+    }
+
+    fn contains_style(&self, style_id: StyleId) -> bool {
+        self.styles().any(|style| *style.id() == style_id)
+    }
+
+    /// 音声モデルを受け入れ可能かをチェックする。
+    ///
+    /// # Errors
+    ///
+    /// 次の場合にエラーを返す。
+    ///
+    /// - 現在持っている音声モデルIDかスタイルIDが`model_header`と重複するとき
+    /// - 必要であるはずの`InferenceDomain`のモデルデータが欠けているとき
+    // FIXME: コメントとテストを書く
+    // - https://github.com/VOICEVOX/voicevox_core/pull/761#discussion_r1589978521
+    // - https://github.com/VOICEVOX/voicevox_core/pull/761#discussion_r1589976759
+    fn ensure_acceptable(&self, model_header: &VoiceModelHeader) -> LoadModelResult<()> {
+        let error = |context| LoadModelError {
+            path: model_header.path.clone(),
+            context,
+            source: None,
+        };
+
+        if self.0.contains_key(&model_header.id) {
+            return Err(error(LoadModelErrorKind::ModelAlreadyLoaded {
+                id: model_header.id.clone(),
+            }));
+        }
+
+        // FIXME: https://github.com/VOICEVOX/voicevox_core/pull/761#discussion_r1590200343
+
+        let loaded = self.speakers();
+        let external = model_header.metas.iter();
+        for (loaded, external) in iproduct!(loaded, external) {
+            if loaded.speaker_uuid() == external.speaker_uuid() {
+                loaded.warn_diff_except_styles(external);
+            }
+        }
+
+        let loaded = self.styles();
+        let external = model_header
+            .metas
+            .iter()
+            .flat_map(|speaker| speaker.styles());
+        if let Some((style, _)) =
+            iproduct!(loaded, external).find(|(loaded, external)| loaded.id() == external.id())
+        {
+            return Err(error(LoadModelErrorKind::StyleAlreadyLoaded {
+                id: *style.id(),
+            }));
+        }
+        Ok(())
+    }
+
+    fn insert(
+        &mut self,
+        model_header: &VoiceModelHeader,
+        session_sets_with_inner_ids: InferenceDomainMap<SessionSetsWithInnerIdsByDomain<R>>,
+    ) -> Result<()> {
+        self.ensure_acceptable(model_header)?;
+
+        let prev = self.0.insert(
+            model_header.id.clone(),
+            LoadedModel {
+                metas: model_header.metas.clone(),
+                session_sets_with_inner_ids,
+            },
+        );
+        assert!(prev.is_none());
+        Ok(())
+    }
+
+    fn remove(&mut self, model_id: &VoiceModelId) -> Result<()> {
+        if self.0.remove(model_id).is_none() {
+            return Err(ErrorRepr::ModelNotFound {
+                model_id: model_id.clone(),
+            }
+            .into());
+        }
+        Ok(())
+    }
+
+    fn speakers(&self) -> impl Iterator<Item = &SpeakerMeta> + Clone {
+        self.0.values().flat_map(|LoadedModel { metas, .. }| metas)
+    }
+
+    fn styles(&self) -> impl Iterator<Item = &StyleMeta> {
+        self.speakers().flat_map(|speaker| speaker.styles())
+    }
+}
+
+pub(crate) trait InferenceDomainExt: InferenceDomain {
+    fn visit<R: InferenceRuntime>(
+        map: &InferenceDomainMap<SessionSetsWithInnerIdsByDomain<R>>,
+    ) -> Option<&(StyleIdToModelInnerId, InferenceSessionSet<R, Self>)>;
+}
+
+#[duplicate_item(
+    T              field;
+    [ TalkDomain ] [ talk ];
+)]
+impl InferenceDomainExt for T {
+    fn visit<R: InferenceRuntime>(
+        map: &InferenceDomainMap<SessionSetsWithInnerIdsByDomain<R>>,
+    ) -> Option<&(StyleIdToModelInnerId, InferenceSessionSet<R, Self>)> {
+        map.field.as_ref()
+    }
+}
+
+impl<R: InferenceRuntime> InferenceDomainMap<SessionSetsWithInnerIdsByDomain<R>> {
+    fn get<D: InferenceDomainExt>(
+        &self,
+    ) -> Option<&(StyleIdToModelInnerId, InferenceSessionSet<R, D>)> {
+        D::visit(self)
+    }
+}
+
+impl InferenceDomainMap<ModelBytesWithInnerIdsByDomain> {
+    fn create_session_sets<R: InferenceRuntime>(
+        &self,
+        session_options: &InferenceDomainMap<SessionOptionsByDomain>,
+    ) -> anyhow::Result<InferenceDomainMap<SessionSetsWithInnerIdsByDomain<R>>> {
+        duplicate! {
+            [
+                field;
+                [ talk ];
+            ]
+            let field = self
+                .field
+                .as_ref()
+                .map(|(model_inner_ids, model_bytes)| {
+                    let session_set = InferenceSessionSet::new(model_bytes, &session_options.field)?;
+                    Ok::<_, anyhow::Error>((model_inner_ids.clone(), session_set))
+                })
+                .transpose()?;
+        }
+
+        Ok(InferenceDomainMap { talk })
+    }
+}
+
+type SessionOptionsByDomain = (EnumMap<TalkOperation, InferenceSessionOptions>,);
+
+type SessionSetsWithInnerIdsByDomain<R> =
+    (Option<(StyleIdToModelInnerId, InferenceSessionSet<R, TalkDomain>)>,);
+
+#[cfg(test)]
+mod tests {
+    use enum_map::enum_map;
+    use pretty_assertions::assert_eq;
+    use rstest::rstest;
+
+    use crate::{
+        infer::{
+            domains::{InferenceDomainMap, TalkOperation},
+            InferenceSessionOptions,
+        },
+        macros::tests::assert_debug_fmt_eq,
+        synthesizer::InferenceRuntimeImpl,
+    };
+
+    use super::Status;
+
+    #[rstest]
+    #[case(true, 0)]
+    #[case(true, 1)]
+    #[case(true, 8)]
+    #[case(false, 2)]
+    #[case(false, 4)]
+    #[case(false, 8)]
+    #[case(false, 0)]
+    fn status_new_works(#[case] use_gpu: bool, #[case] cpu_num_threads: u16) {
+        let light_session_options = InferenceSessionOptions::new(cpu_num_threads, false);
+        let heavy_session_options = InferenceSessionOptions::new(cpu_num_threads, use_gpu);
+        let session_options = InferenceDomainMap {
+            talk: enum_map! {
+                TalkOperation::PredictDuration
+                | TalkOperation::PredictIntonation => light_session_options,
+                TalkOperation::Decode => heavy_session_options,
+            },
+        };
+        let status = Status::<InferenceRuntimeImpl>::new(session_options);
+
+        assert_eq!(
+            light_session_options,
+            status.session_options.talk[TalkOperation::PredictDuration],
+        );
+        assert_eq!(
+            light_session_options,
+            status.session_options.talk[TalkOperation::PredictIntonation],
+        );
+        assert_eq!(
+            heavy_session_options,
+            status.session_options.talk[TalkOperation::Decode],
+        );
+
+        assert!(status.loaded_models.lock().unwrap().0.is_empty());
+    }
+
+    #[rstest]
+    #[tokio::test]
+    async fn status_load_model_works() {
+        let status = Status::<InferenceRuntimeImpl>::new(InferenceDomainMap {
+            talk: enum_map!(_ => InferenceSessionOptions::new(0, false)),
+        });
+        let model = &crate::tokio::VoiceModel::sample().await.unwrap();
+        let model_contents = &model.read_inference_models().await.unwrap();
+        let result = status.insert_model(model.header(), model_contents);
+        assert_debug_fmt_eq!(Ok(()), result);
+        assert_eq!(1, status.loaded_models.lock().unwrap().0.len());
+    }
+
+    #[rstest]
+    #[tokio::test]
+    async fn status_is_model_loaded_works() {
+        let status = Status::<InferenceRuntimeImpl>::new(InferenceDomainMap {
+            talk: enum_map!(_ => InferenceSessionOptions::new(0, false)),
+        });
+        let vvm = &crate::tokio::VoiceModel::sample().await.unwrap();
+        let model_header = vvm.header();
+        let model_contents = &vvm.read_inference_models().await.unwrap();
+        assert!(
+            !status.is_loaded_model(&model_header.id),
+            "model should  not be loaded"
+        );
+        let result = status.insert_model(model_header, model_contents);
+        assert_debug_fmt_eq!(Ok(()), result);
+        assert!(
+            status.is_loaded_model(&model_header.id),
+            "model should be loaded",
+        );
+    }
+}
diff --git a/crates/voicevox_core/src/synthesizer.rs b/crates/voicevox_core/src/synthesizer.rs
index b90139434..5e4894415 100644
--- a/crates/voicevox_core/src/synthesizer.rs
+++ b/crates/voicevox_core/src/synthesizer.rs
@@ -83,14 +83,14 @@ pub(crate) mod blocking {
         engine::{create_kana, mora_to_text, MoraModel, OjtPhoneme},
         error::ErrorRepr,
         infer::{
-            domain::{
-                DecodeInput, DecodeOutput, InferenceDomainImpl, InferenceOperationImpl,
-                PredictDurationInput, PredictDurationOutput, PredictIntonationInput,
-                PredictIntonationOutput,
+            domains::{
+                DecodeInput, DecodeOutput, InferenceDomainMap, PredictDurationInput,
+                PredictDurationOutput, PredictIntonationInput, PredictIntonationOutput, TalkDomain,
+                TalkOperation,
             },
-            status::Status,
             InferenceSessionOptions,
         },
+        status::Status,
         text_analyzer::{KanaAnalyzer, OpenJTalkAnalyzer, TextAnalyzer},
         AccentPhraseModel, AudioQueryModel, FullcontextExtractor, Result, StyleId,
         SupportedDevices, SynthesisOptions, VoiceModelId, VoiceModelMeta,
@@ -102,7 +102,7 @@ pub(crate) mod blocking {
 
     /// 音声シンセサイザ。
     pub struct Synthesizer<O> {
-        pub(super) status: Status<InferenceRuntimeImpl, InferenceDomainImpl>,
+        pub(super) status: Status<InferenceRuntimeImpl>,
         open_jtalk_analyzer: OpenJTalkAnalyzer<O>,
         kana_analyzer: KanaAnalyzer,
         use_gpu: bool,
@@ -169,10 +169,12 @@ pub(crate) mod blocking {
             let heavy_session_options =
                 InferenceSessionOptions::new(options.cpu_num_threads, use_gpu);
 
-            let status = Status::new(enum_map! {
-                InferenceOperationImpl::PredictDuration
-                | InferenceOperationImpl::PredictIntonation => light_session_options,
-                InferenceOperationImpl::Decode => heavy_session_options,
+            let status = Status::new(InferenceDomainMap {
+                talk: enum_map! {
+                    TalkOperation::PredictDuration
+                    | TalkOperation::PredictIntonation => light_session_options,
+                    TalkOperation::Decode => heavy_session_options,
+                },
             });
 
             return Ok(Self {
@@ -441,6 +443,7 @@ pub(crate) mod blocking {
         /// # async fn main() -> anyhow::Result<()> {
         /// # let synthesizer =
         /// #     voicevox_core::__internal::doctest_fixtures::synthesizer_with_sample_voice_model(
+        /// #         test_util::SAMPLE_VOICE_MODEL_FILE_PATH,
         /// #         test_util::OPEN_JTALK_DIC_DIR,
         /// #     )
         /// #     .await?;
@@ -680,6 +683,7 @@ pub(crate) mod blocking {
         /// # async fn main() -> anyhow::Result<()> {
         /// # let synthesizer =
         /// #     voicevox_core::__internal::doctest_fixtures::synthesizer_with_sample_voice_model(
+        /// #         test_util::SAMPLE_VOICE_MODEL_FILE_PATH,
         /// #         test_util::OPEN_JTALK_DIC_DIR,
         /// #     )
         /// #     .await?;
@@ -728,6 +732,7 @@ pub(crate) mod blocking {
         /// # async fn main() -> anyhow::Result<()> {
         /// # let synthesizer =
         /// #     voicevox_core::__internal::doctest_fixtures::synthesizer_with_sample_voice_model(
+        /// #         test_util::SAMPLE_VOICE_MODEL_FILE_PATH,
         /// #         test_util::OPEN_JTALK_DIC_DIR,
         /// #     )
         /// #     .await?;
@@ -760,6 +765,7 @@ pub(crate) mod blocking {
         /// # async fn main() -> anyhow::Result<()> {
         /// # let synthesizer =
         /// #     voicevox_core::__internal::doctest_fixtures::synthesizer_with_sample_voice_model(
+        /// #         test_util::SAMPLE_VOICE_MODEL_FILE_PATH,
         /// #         test_util::OPEN_JTALK_DIC_DIR,
         /// #     )
         /// #     .await?;
@@ -830,12 +836,7 @@ pub(crate) mod blocking {
 
     impl<O> PerformInference for self::Synthesizer<O> {
         fn predict_duration(&self, phoneme_vector: &[i64], style_id: StyleId) -> Result<Vec<f32>> {
-            // FIXME: `Status::ids_for`があるため、ここは不要なはず
-            if !self.status.validate_speaker_id(style_id) {
-                return Err(ErrorRepr::StyleNotFound { style_id }.into());
-            }
-
-            let (model_id, model_inner_id) = self.status.ids_for(style_id)?;
+            let (model_id, model_inner_id) = self.status.ids_for::<TalkDomain>(style_id)?;
 
             let PredictDurationOutput {
                 phoneme_length: output,
@@ -870,12 +871,7 @@ pub(crate) mod blocking {
             end_accent_phrase_vector: &[i64],
             style_id: StyleId,
         ) -> Result<Vec<f32>> {
-            // FIXME: `Status::ids_for`があるため、ここは不要なはず
-            if !self.status.validate_speaker_id(style_id) {
-                return Err(ErrorRepr::StyleNotFound { style_id }.into());
-            }
-
-            let (model_id, model_inner_id) = self.status.ids_for(style_id)?;
+            let (model_id, model_inner_id) = self.status.ids_for::<TalkDomain>(style_id)?;
 
             let PredictIntonationOutput { f0_list: output } = self.status.run_session(
                 &model_id,
@@ -902,12 +898,7 @@ pub(crate) mod blocking {
             phoneme_vector: &[f32],
             style_id: StyleId,
         ) -> Result<Vec<f32>> {
-            // FIXME: `Status::ids_for`があるため、ここは不要なはず
-            if !self.status.validate_speaker_id(style_id) {
-                return Err(ErrorRepr::StyleNotFound { style_id }.into());
-            }
-
-            let (model_id, model_inner_id) = self.status.ids_for(style_id)?;
+            let (model_id, model_inner_id) = self.status.ids_for::<TalkDomain>(style_id)?;
 
             // 音が途切れてしまうのを避けるworkaround処理が入っている
             // TODO: 改善したらここのpadding処理を取り除く
@@ -1304,8 +1295,7 @@ mod tests {
 
     use super::{blocking::PerformInference as _, AccelerationMode, InitializeOptions};
     use crate::{
-        engine::MoraModel, macros::tests::assert_debug_fmt_eq, test_util::open_default_vvm_file,
-        AccentPhraseModel, Result, StyleId,
+        engine::MoraModel, macros::tests::assert_debug_fmt_eq, AccentPhraseModel, Result, StyleId,
     };
     use ::test_util::OPEN_JTALK_DIC_DIR;
     use rstest::rstest;
@@ -1324,7 +1314,7 @@ mod tests {
         .unwrap();
 
         let result = syntesizer
-            .load_voice_model(&open_default_vvm_file().await)
+            .load_voice_model(&crate::tokio::VoiceModel::sample().await.unwrap())
             .await;
 
         assert_debug_fmt_eq!(
@@ -1366,7 +1356,7 @@ mod tests {
             "expected is_model_loaded to return false, but got true",
         );
         syntesizer
-            .load_voice_model(&open_default_vvm_file().await)
+            .load_voice_model(&crate::tokio::VoiceModel::sample().await.unwrap())
             .await
             .unwrap();
 
@@ -1391,7 +1381,7 @@ mod tests {
         .unwrap();
 
         syntesizer
-            .load_voice_model(&open_default_vvm_file().await)
+            .load_voice_model(&crate::tokio::VoiceModel::sample().await.unwrap())
             .await
             .unwrap();
 
@@ -1421,7 +1411,7 @@ mod tests {
         )
         .unwrap();
         syntesizer
-            .load_voice_model(&open_default_vvm_file().await)
+            .load_voice_model(&crate::tokio::VoiceModel::sample().await.unwrap())
             .await
             .unwrap();
 
@@ -1460,7 +1450,7 @@ mod tests {
         )
         .unwrap();
         syntesizer
-            .load_voice_model(&open_default_vvm_file().await)
+            .load_voice_model(&crate::tokio::VoiceModel::sample().await.unwrap())
             .await
             .unwrap();
 
diff --git a/crates/voicevox_core/src/test_data/model_sources/load_model_works1/manifest.json b/crates/voicevox_core/src/test_data/model_sources/load_model_works1/manifest.json
deleted file mode 100644
index a8a7adebf..000000000
--- a/crates/voicevox_core/src/test_data/model_sources/load_model_works1/manifest.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-  "manifest_version": "0.0.0",
-  "metas_filename": "metas.json",
-  "decode_filename": "decode.onnx",
-  "predict_duration_filename": "predict_duration.onnx",
-  "predict_intonation_filename": "predict_intonation.onnx",
-  "style_id_to_model_inner_id": {
-    "302": 2,
-    "303": 3
-  }
-}
diff --git a/crates/voicevox_core/src/test_util.rs b/crates/voicevox_core/src/test_util.rs
index d60785246..5b97f21fc 100644
--- a/crates/voicevox_core/src/test_util.rs
+++ b/crates/voicevox_core/src/test_util.rs
@@ -1,27 +1,9 @@
-use std::path::PathBuf;
+use ::test_util::SAMPLE_VOICE_MODEL_FILE_PATH;
 
 use crate::Result;
 
-pub(crate) async fn open_default_vvm_file() -> crate::tokio::VoiceModel {
-    crate::tokio::VoiceModel::from_path(
-        ::test_util::convert_zip_vvm(
-            PathBuf::from(env!("CARGO_WORKSPACE_DIR"))
-                .join(file!())
-                .parent()
-                .unwrap()
-                .join("test_data/model_sources")
-                .join("load_model_works1"),
-        )
-        .await,
-    )
-    .await
-    .unwrap()
-}
-
 impl crate::tokio::VoiceModel {
     pub(crate) async fn sample() -> Result<Self> {
-        return Self::from_path(PATH).await;
-
-        static PATH: &str = concat!(env!("CARGO_WORKSPACE_DIR"), "/model/sample.vvm");
+        Self::from_path(SAMPLE_VOICE_MODEL_FILE_PATH).await
     }
 }
diff --git a/crates/voicevox_core/src/voice_model.rs b/crates/voicevox_core/src/voice_model.rs
index 76f692eaa..364c8db0a 100644
--- a/crates/voicevox_core/src/voice_model.rs
+++ b/crates/voicevox_core/src/voice_model.rs
@@ -2,21 +2,33 @@
 //!
 //! VVM ファイルの定義と形式は[ドキュメント](../../../docs/vvm.md)を参照。
 
+use anyhow::anyhow;
 use derive_getters::Getters;
 use derive_new::new;
+use easy_ext::ext;
+use enum_map::EnumMap;
+use itertools::Itertools as _;
 use serde::Deserialize;
 
 use crate::{
-    manifest::{Manifest, ModelInnerId},
-    SpeakerMeta, StyleId, StyleMeta, VoiceModelMeta,
+    error::{LoadModelError, LoadModelErrorKind, LoadModelResult},
+    infer::{
+        domains::{TalkDomain, TalkOperation},
+        InferenceDomain,
+    },
+    manifest::{Manifest, ManifestDomains, StyleIdToModelInnerId},
+    SpeakerMeta, StyleMeta, StyleType, VoiceModelMeta,
 };
-use std::{collections::BTreeMap, path::PathBuf};
+use std::path::{Path, PathBuf};
 
 /// [`VoiceModelId`]の実体。
 ///
 /// [`VoiceModelId`]: VoiceModelId
 pub type RawVoiceModelId = String;
 
+pub(crate) type ModelBytesWithInnerIdsByDomain =
+    (Option<(StyleIdToModelInnerId, EnumMap<TalkOperation, Vec<u8>>)>,);
+
 /// 音声モデルID。
 #[derive(
     PartialEq,
@@ -45,29 +57,91 @@ pub(crate) struct VoiceModelHeader {
     pub(crate) id: VoiceModelId,
     manifest: Manifest,
     /// メタ情報。
+    ///
+    /// `manifest`が対応していない`StyleType`のスタイルは含まれるべきではない。
     pub(crate) metas: VoiceModelMeta,
     pub(crate) path: PathBuf,
 }
 
 impl VoiceModelHeader {
-    /// モデル内のすべてのスタイルに対するモデル内IDを取得する。
+    fn new(
+        id: VoiceModelId,
+        manifest: Manifest,
+        metas: &[u8],
+        path: &Path,
+    ) -> LoadModelResult<Self> {
+        let metas =
+            serde_json::from_slice::<VoiceModelMeta>(metas).map_err(|source| LoadModelError {
+                path: path.to_owned(),
+                context: LoadModelErrorKind::InvalidModelFormat,
+                source: Some(
+                    anyhow::Error::from(source)
+                        .context(format!("{}が不正です", manifest.metas_filename())),
+                ),
+            })?;
+
+        manifest
+            .domains()
+            .check_acceptable(&metas)
+            .map_err(|style_type| LoadModelError {
+                path: path.to_owned(),
+                context: LoadModelErrorKind::InvalidModelFormat,
+                source: Some(anyhow!(
+                    "{metas_filename}には`{style_type}`のスタイルが存在しますが、manifest.jsonでの\
+                     対応がありません",
+                    metas_filename = manifest.metas_filename(),
+                )),
+            })?;
+
+        Ok(Self {
+            id,
+            manifest,
+            metas,
+            path: path.to_owned(),
+        })
+    }
+}
+
+impl ManifestDomains {
+    /// manifestとして対応していない`StyleType`に対してエラーを発する。
     ///
-    /// モデル内IDのマッピングが存在しない場合はそのままスタイルIDを返す。
-    pub(crate) fn model_inner_ids(&self) -> BTreeMap<StyleId, ModelInnerId> {
-        self.metas
+    /// `Status`はこのバリデーションを信頼し、`InferenceDomain`の不足時にパニックする。
+    fn check_acceptable(&self, metas: &[SpeakerMeta]) -> std::result::Result<(), StyleType> {
+        let err = metas
             .iter()
             .flat_map(SpeakerMeta::styles)
-            .map(StyleMeta::id)
-            .map(|&style_id| {
-                let model_inner_id = self
-                    .manifest
-                    .style_id_to_model_inner_id()
-                    .get(&style_id)
-                    .copied()
-                    .unwrap_or_else(|| ModelInnerId::new(style_id.raw_id()));
-                (style_id, model_inner_id)
-            })
-            .collect()
+            .map(StyleMeta::r#type)
+            .copied()
+            .unique()
+            .find(|&style_type| !self.accepts(style_type));
+
+        match err {
+            Some(err) => Err(err),
+            None => Ok(()),
+        }
+    }
+
+    /// メタ情報にタイプが`style_type`のスタイルが含まれることを許容するかどうか。
+    ///
+    /// 例えば`self.talk`が`None`のとき、`StyleType::Talk`に対して`false`を返す。
+    fn accepts(&self, style_type: StyleType) -> bool {
+        let Self { talk } = self;
+
+        return TalkDomain::contains(style_type).implies(|| talk.is_some());
+
+        #[ext]
+        impl<D: InferenceDomain> D {
+            fn contains(style_type: StyleType) -> bool {
+                Self::style_types().contains(&style_type)
+            }
+        }
+
+        #[ext]
+        impl bool {
+            fn implies(self, other: impl FnOnce() -> Self) -> Self {
+                !self || other()
+            }
+        }
     }
 }
 
@@ -85,12 +159,12 @@ pub(crate) mod blocking {
 
     use crate::{
         error::{LoadModelError, LoadModelErrorKind, LoadModelResult},
-        infer::domain::InferenceOperationImpl,
-        manifest::Manifest,
+        infer::domains::InferenceDomainMap,
+        manifest::{Manifest, TalkManifest},
         VoiceModelMeta,
     };
 
-    use super::{VoiceModelHeader, VoiceModelId};
+    use super::{ModelBytesWithInnerIdsByDomain, VoiceModelHeader, VoiceModelId};
 
     /// 音声モデル。
     ///
@@ -103,39 +177,52 @@ pub(crate) mod blocking {
     impl self::VoiceModel {
         pub(crate) fn read_inference_models(
             &self,
-        ) -> LoadModelResult<EnumMap<InferenceOperationImpl, Vec<u8>>> {
+        ) -> LoadModelResult<InferenceDomainMap<ModelBytesWithInnerIdsByDomain>> {
             let reader = BlockingVvmEntryReader::open(&self.header.path)?;
 
-            let model_bytes = [
-                self.header.manifest.predict_duration_filename(),
-                self.header.manifest.predict_intonation_filename(),
-                self.header.manifest.decode_filename(),
-            ]
-            .into_par_iter()
-            .map(|filename| reader.read_vvm_entry(filename))
-            .collect::<std::result::Result<Vec<_>, _>>()?
-            .try_into()
-            .unwrap_or_else(|_| panic!("should be same length"));
-
-            Ok(EnumMap::from_array(model_bytes))
+            let talk = self
+                .header
+                .manifest
+                .domains()
+                .talk
+                .as_ref()
+                .map(
+                    |TalkManifest {
+                         predict_duration_filename,
+                         predict_intonation_filename,
+                         decode_filename,
+                         style_id_to_model_inner_id,
+                     }| {
+                        let model_bytes = [
+                            predict_duration_filename,
+                            predict_intonation_filename,
+                            decode_filename,
+                        ]
+                        .into_par_iter()
+                        .map(|filename| reader.read_vvm_entry(filename))
+                        .collect::<std::result::Result<Vec<_>, _>>()?
+                        .try_into()
+                        .unwrap_or_else(|_| panic!("should be same length"));
+
+                        let model_bytes = EnumMap::from_array(model_bytes);
+
+                        Ok((style_id_to_model_inner_id.clone(), model_bytes))
+                    },
+                )
+                .transpose()?;
+
+            Ok(InferenceDomainMap { talk })
         }
 
         /// VVMファイルから`VoiceModel`をコンストラクトする。
         pub fn from_path(path: impl AsRef<Path>) -> crate::Result<Self> {
-            let path = path.as_ref().to_owned();
-            let reader = BlockingVvmEntryReader::open(&path)?;
+            let path = path.as_ref();
+            let reader = BlockingVvmEntryReader::open(path)?;
             let manifest = reader.read_vvm_json::<Manifest>("manifest.json")?;
-            let metas = reader.read_vvm_json(manifest.metas_filename())?;
+            let metas = &reader.read_vvm_entry(manifest.metas_filename())?;
             let id = VoiceModelId::new(nanoid!());
-
-            Ok(Self {
-                header: VoiceModelHeader {
-                    id,
-                    metas,
-                    manifest,
-                    path,
-                },
-            })
+            let header = VoiceModelHeader::new(id, manifest, metas, path)?;
+            Ok(Self { header })
         }
 
         /// ID。
@@ -177,12 +264,13 @@ pub(crate) mod blocking {
             })
         }
 
+        // FIXME: manifest.json専用になっているので、そういう関数名にする
         fn read_vvm_json<T: DeserializeOwned>(&self, filename: &str) -> LoadModelResult<T> {
             let bytes = &self.read_vvm_entry(filename)?;
             serde_json::from_slice(bytes).map_err(|source| LoadModelError {
                 path: self.borrow_path().clone(),
-                context: LoadModelErrorKind::OpenZipFile,
-                source: Some(source.into()),
+                context: LoadModelErrorKind::InvalidModelFormat,
+                source: Some(anyhow::Error::from(source).context(format!("{filename}が不正です"))),
             })
         }
 
@@ -208,18 +296,18 @@ pub(crate) mod tokio {
 
     use derive_new::new;
     use enum_map::EnumMap;
-    use futures::future::join3;
+    use futures::future::{join3, OptionFuture};
     use nanoid::nanoid;
     use serde::de::DeserializeOwned;
 
     use crate::{
         error::{LoadModelError, LoadModelErrorKind, LoadModelResult},
-        infer::domain::InferenceOperationImpl,
-        manifest::Manifest,
+        infer::domains::InferenceDomainMap,
+        manifest::{Manifest, TalkManifest},
         Result, VoiceModelMeta,
     };
 
-    use super::{VoiceModelHeader, VoiceModelId};
+    use super::{ModelBytesWithInnerIdsByDomain, VoiceModelHeader, VoiceModelId};
 
     /// 音声モデル。
     ///
@@ -232,42 +320,49 @@ pub(crate) mod tokio {
     impl self::VoiceModel {
         pub(crate) async fn read_inference_models(
             &self,
-        ) -> LoadModelResult<EnumMap<InferenceOperationImpl, Vec<u8>>> {
+        ) -> LoadModelResult<InferenceDomainMap<ModelBytesWithInnerIdsByDomain>> {
             let reader = AsyncVvmEntryReader::open(&self.header.path).await?;
-            let (
-                decode_model_result,
-                predict_duration_model_result,
-                predict_intonation_model_result,
-            ) = join3(
-                reader.read_vvm_entry(self.header.manifest.decode_filename()),
-                reader.read_vvm_entry(self.header.manifest.predict_duration_filename()),
-                reader.read_vvm_entry(self.header.manifest.predict_intonation_filename()),
-            )
-            .await;
-
-            Ok(EnumMap::from_array([
-                predict_duration_model_result?,
-                predict_intonation_model_result?,
-                decode_model_result?,
-            ]))
+
+            let talk = OptionFuture::from(self.header.manifest.domains().talk.as_ref().map(
+                |TalkManifest {
+                     predict_duration_filename,
+                     predict_intonation_filename,
+                     decode_filename,
+                     style_id_to_model_inner_id,
+                 }| async {
+                    let (
+                        decode_model_result,
+                        predict_duration_model_result,
+                        predict_intonation_model_result,
+                    ) = join3(
+                        reader.read_vvm_entry(decode_filename),
+                        reader.read_vvm_entry(predict_duration_filename),
+                        reader.read_vvm_entry(predict_intonation_filename),
+                    )
+                    .await;
+
+                    let model_bytes = EnumMap::from_array([
+                        predict_duration_model_result?,
+                        predict_intonation_model_result?,
+                        decode_model_result?,
+                    ]);
+
+                    Ok((style_id_to_model_inner_id.clone(), model_bytes))
+                },
+            ))
+            .await
+            .transpose()?;
+
+            Ok(InferenceDomainMap { talk })
         }
         /// VVMファイルから`VoiceModel`をコンストラクトする。
         pub async fn from_path(path: impl AsRef<Path>) -> Result<Self> {
             let reader = AsyncVvmEntryReader::open(path.as_ref()).await?;
             let manifest = reader.read_vvm_json::<Manifest>("manifest.json").await?;
-            let metas = reader
-                .read_vvm_json::<VoiceModelMeta>(manifest.metas_filename())
-                .await?;
+            let metas = &reader.read_vvm_entry(manifest.metas_filename()).await?;
             let id = VoiceModelId::new(nanoid!());
-
-            Ok(Self {
-                header: VoiceModelHeader {
-                    id,
-                    metas,
-                    manifest,
-                    path: path.as_ref().into(),
-                },
-            })
+            let header = VoiceModelHeader::new(id, manifest, metas, path.as_ref())?;
+            Ok(Self { header })
         }
 
         /// ID。
@@ -324,14 +419,13 @@ pub(crate) mod tokio {
                 .collect();
             Ok(AsyncVvmEntryReader::new(path, reader, entry_map))
         }
+        // FIXME: manifest.json専用になっているので、そういう関数名にする
         async fn read_vvm_json<T: DeserializeOwned>(&self, filename: &str) -> LoadModelResult<T> {
             let bytes = self.read_vvm_entry(filename).await?;
             serde_json::from_slice(&bytes).map_err(|source| LoadModelError {
                 path: self.path.to_owned(),
-                context: LoadModelErrorKind::ReadZipEntry {
-                    filename: filename.to_owned(),
-                },
-                source: Some(source.into()),
+                context: LoadModelErrorKind::InvalidModelFormat,
+                source: Some(anyhow::Error::from(source).context(format!("{filename}が不正です"))),
             })
         }
 
@@ -357,3 +451,102 @@ pub(crate) mod tokio {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use once_cell::sync::Lazy;
+    use rstest::{fixture, rstest};
+    use serde_json::json;
+
+    use crate::{
+        manifest::{ManifestDomains, TalkManifest},
+        SpeakerMeta, StyleType,
+    };
+
+    #[rstest]
+    #[case(
+        &ManifestDomains {
+            talk: None,
+        },
+        &[],
+        Ok(())
+    )]
+    #[case(
+        &ManifestDomains {
+            talk: Some(TALK_MANIFEST.clone()),
+        },
+        &[speaker(&[StyleType::Talk])],
+        Ok(())
+    )]
+    #[case(
+        &ManifestDomains {
+            talk: Some(TALK_MANIFEST.clone()),
+        },
+        &[speaker(&[StyleType::Talk, StyleType::Sing])],
+        Ok(())
+    )]
+    #[case(
+        &ManifestDomains {
+            talk: None,
+        },
+        &[speaker(&[StyleType::Talk])],
+        Err(())
+    )]
+    fn check_acceptable_works(
+        #[case] manifest: &ManifestDomains,
+        #[case] metas: &[SpeakerMeta],
+        #[case] expected: std::result::Result<(), ()>,
+    ) {
+        let actual = manifest.check_acceptable(metas).map_err(|_| ());
+        assert_eq!(expected, actual);
+    }
+
+    static TALK_MANIFEST: Lazy<TalkManifest> = Lazy::new(|| TalkManifest {
+        predict_duration_filename: "".to_owned(),
+        predict_intonation_filename: "".to_owned(),
+        decode_filename: "".to_owned(),
+        style_id_to_model_inner_id: Default::default(),
+    });
+
+    #[fixture]
+    fn talk_speaker() -> SpeakerMeta {
+        serde_json::from_value(json!({
+            "name": "dummy",
+            "styles": [
+                {
+                    "id": 0,
+                    "name": "style1",
+                    "type": "talk",
+                    "order": 0
+                }
+            ],
+            "version": "0.0.1",
+            "speaker_uuid": "574bc678-8370-44be-b941-08e46e7b47d7",
+            "order": 0
+        }))
+        .unwrap()
+    }
+
+    fn speaker(style_types: &'static [StyleType]) -> SpeakerMeta {
+        let styles = style_types
+            .iter()
+            .map(|style_type| {
+                json!({
+                    "id": 0,
+                    "name": "style1",
+                    "type": style_type,
+                    "order": null
+                })
+            })
+            .collect::<Vec<_>>();
+
+        serde_json::from_value(json!({
+            "name": "dummy",
+            "styles": styles,
+            "version": "0.0.1",
+            "speaker_uuid": "574bc678-8370-44be-b941-08e46e7b47d7",
+            "order": null
+        }))
+        .unwrap()
+    }
+}
diff --git a/crates/voicevox_core_c_api/Cargo.toml b/crates/voicevox_core_c_api/Cargo.toml
index 3d950f0e8..a6314f105 100644
--- a/crates/voicevox_core_c_api/Cargo.toml
+++ b/crates/voicevox_core_c_api/Cargo.toml
@@ -49,7 +49,6 @@ ndarray-stats.workspace = true
 regex.workspace = true
 serde = { workspace = true, features = ["derive"] }
 serde_with.workspace = true
-strum = { workspace = true, features = ["derive"] }
 tempfile.workspace = true
 test_util.workspace = true
 toml.workspace = true
diff --git a/crates/voicevox_core_c_api/include/voicevox_core.h b/crates/voicevox_core_c_api/include/voicevox_core.h
index 2275bd1d7..592ec8abb 100644
--- a/crates/voicevox_core_c_api/include/voicevox_core.h
+++ b/crates/voicevox_core_c_api/include/voicevox_core.h
@@ -142,6 +142,10 @@ enum VoicevoxResultCode
    * ZIP内のファイルが読めなかった
    */
   VOICEVOX_RESULT_READ_ZIP_ENTRY_ERROR = 17,
+  /**
+   * モデルの形式が不正
+   */
+  VOICEVOX_RESULT_INVALID_MODEL_HEADER_ERROR = 28,
   /**
    * すでに読み込まれている音声モデルを読み込もうとした
    */
diff --git a/crates/voicevox_core_c_api/src/helpers.rs b/crates/voicevox_core_c_api/src/helpers.rs
index 74177db9c..1c163a0d0 100644
--- a/crates/voicevox_core_c_api/src/helpers.rs
+++ b/crates/voicevox_core_c_api/src/helpers.rs
@@ -37,6 +37,7 @@ pub(crate) fn into_result_code_with_error(result: CApiResult<()>) -> VoicevoxRes
                 GpuSupport => VOICEVOX_RESULT_GPU_SUPPORT_ERROR,
                 OpenZipFile => VOICEVOX_RESULT_OPEN_ZIP_FILE_ERROR,
                 ReadZipEntry => VOICEVOX_RESULT_READ_ZIP_ENTRY_ERROR,
+                InvalidModelFormat => VOICEVOX_RESULT_INVALID_MODEL_HEADER_ERROR,
                 ModelAlreadyLoaded => VOICEVOX_RESULT_MODEL_ALREADY_LOADED_ERROR,
                 StyleAlreadyLoaded => VOICEVOX_RESULT_STYLE_ALREADY_LOADED_ERROR,
                 InvalidModelData => VOICEVOX_RESULT_INVALID_MODEL_DATA_ERROR,
diff --git a/crates/voicevox_core_c_api/src/result_code.rs b/crates/voicevox_core_c_api/src/result_code.rs
index 65236ada4..0897dfa87 100644
--- a/crates/voicevox_core_c_api/src/result_code.rs
+++ b/crates/voicevox_core_c_api/src/result_code.rs
@@ -37,6 +37,8 @@ pub enum VoicevoxResultCode {
     VOICEVOX_RESULT_OPEN_ZIP_FILE_ERROR = 16,
     /// ZIP内のファイルが読めなかった
     VOICEVOX_RESULT_READ_ZIP_ENTRY_ERROR = 17,
+    /// モデルの形式が不正
+    VOICEVOX_RESULT_INVALID_MODEL_HEADER_ERROR = 28,
     /// すでに読み込まれている音声モデルを読み込もうとした
     VOICEVOX_RESULT_MODEL_ALREADY_LOADED_ERROR = 18,
     /// すでに読み込まれているスタイルを読み込もうとした
@@ -90,6 +92,7 @@ pub(crate) const fn error_result_to_message(result_code: VoicevoxResultCode) ->
         VOICEVOX_RESULT_READ_ZIP_ENTRY_ERROR => {
             cstr!("ZIP内のファイルを読むことができませんでした")
         }
+        VOICEVOX_RESULT_INVALID_MODEL_HEADER_ERROR => cstr!("モデルの形式が不正です"),
         VOICEVOX_RESULT_MODEL_ALREADY_LOADED_ERROR => cstr!("同じIDのモデルを読むことはできません"),
         VOICEVOX_RESULT_STYLE_ALREADY_LOADED_ERROR => {
             cstr!("同じIDのスタイルを読むことはできません")
diff --git a/crates/voicevox_core_c_api/tests/e2e/assert_cdylib.rs b/crates/voicevox_core_c_api/tests/e2e/assert_cdylib.rs
index 11da69437..1e4958eda 100644
--- a/crates/voicevox_core_c_api/tests/e2e/assert_cdylib.rs
+++ b/crates/voicevox_core_c_api/tests/e2e/assert_cdylib.rs
@@ -36,7 +36,7 @@ pub(crate) fn exec<C: TestContext>() -> anyhow::Result<()> {
         let exec_c_api_e2e_test = serde_json::from_str::<Box<dyn TestCase>>(&exec_c_api_e2e_test)?;
 
         return unsafe {
-            let lib = &Library::new(C::cdylib_path())?;
+            let lib = Library::new(C::cdylib_path())?;
             exec_c_api_e2e_test.exec(lib)
         };
     }
@@ -113,7 +113,7 @@ pub(crate) trait TestCase: Send {
     ///
     /// `exec`は独立したプロセスで実行されるため、stdout/stderrへの出力をしたりグローバルな状態に
     /// 依存してもよい。
-    unsafe fn exec(&self, lib: &Library) -> anyhow::Result<()>;
+    unsafe fn exec(&self, lib: Library) -> anyhow::Result<()>;
 
     /// 別プロセスで実行された`exec`の結果をチェックする。
     fn assert_output(&self, output: Utf8Output) -> AssertResult;
diff --git a/crates/voicevox_core_c_api/tests/e2e/main.rs b/crates/voicevox_core_c_api/tests/e2e/main.rs
index b8d3165c6..91f5e06e9 100644
--- a/crates/voicevox_core_c_api/tests/e2e/main.rs
+++ b/crates/voicevox_core_c_api/tests/e2e/main.rs
@@ -1,15 +1,14 @@
+use test_util::c_api::VV_MODELS_ROOT_DIR;
+
 mod assert_cdylib;
 mod float_assert;
 mod log_mask;
 mod snapshots;
-mod symbols;
 mod testcases;
 
 // voicevox_core_c_apiのcdylibを対象にテストを行う。
 //
-// C APIの定義を変更する場合:
-// 1. symbols.rsの実装を変更する。
-// 2. 1.によってコンパイルが通らなくなったら、適宜修正する。
+// C APIの定義を変更した場合は、テスト実行前に`cargo xtask update-c-header`を実行すること。
 //
 // テストを追加する場合:
 // 1. testcases/{テスト名}.rsを追加し、testcases.rsでマウントする。
@@ -36,6 +35,6 @@ fn main() -> anyhow::Result<()> {
             ("ORT_USE_CUDA", "0"),
         ];
         const RUNTIME_ENVS: &'static [(&'static str, &'static str)] =
-            &[("VV_MODELS_ROOT_DIR", "../../model")];
+            &[("VV_MODELS_ROOT_DIR", VV_MODELS_ROOT_DIR)];
     }
 }
diff --git a/crates/voicevox_core_c_api/tests/e2e/snapshots.toml b/crates/voicevox_core_c_api/tests/e2e/snapshots.toml
index 25926487e..151074cb3 100644
--- a/crates/voicevox_core_c_api/tests/e2e/snapshots.toml
+++ b/crates/voicevox_core_c_api/tests/e2e/snapshots.toml
@@ -7,6 +7,7 @@ metas = '''
       {
         "id": 0,
         "name": "style1",
+        "type": "talk",
         "order": null
       }
     ],
@@ -20,6 +21,7 @@ metas = '''
       {
         "id": 1,
         "name": "style2",
+        "type": "talk",
         "order": null
       }
     ],
@@ -33,11 +35,13 @@ metas = '''
       {
         "id": 302,
         "name": "style3-1",
+        "type": "talk",
         "order": null
       },
       {
         "id": 303,
         "name": "style3-2",
+        "type": "talk",
         "order": null
       }
     ],
@@ -97,6 +101,7 @@ metas = '''
       {
         "id": 0,
         "name": "style1",
+        "type": "talk",
         "order": null
       }
     ],
@@ -110,6 +115,7 @@ metas = '''
       {
         "id": 1,
         "name": "style2",
+        "type": "talk",
         "order": null
       }
     ],
@@ -123,11 +129,13 @@ metas = '''
       {
         "id": 302,
         "name": "style3-1",
+        "type": "talk",
         "order": null
       },
       {
         "id": 303,
         "name": "style3-2",
+        "type": "talk",
         "order": null
       }
     ],
diff --git a/crates/voicevox_core_c_api/tests/e2e/symbols.rs b/crates/voicevox_core_c_api/tests/e2e/symbols.rs
deleted file mode 100644
index f6ecd4a3b..000000000
--- a/crates/voicevox_core_c_api/tests/e2e/symbols.rs
+++ /dev/null
@@ -1,334 +0,0 @@
-use std::ffi::{c_char, c_int, c_void};
-
-use libloading::{Library, Symbol};
-use strum::EnumIter;
-
-/// voicevox\_core\_c\_apiのcdylibのシンボルを集めたもの。
-#[allow(dead_code)] // TODO: WIP
-pub(crate) struct Symbols<'lib> {
-    pub(crate) voicevox_open_jtalk_rc_new: Symbol<
-        'lib,
-        unsafe extern "C" fn(*const c_char, *mut *mut OpenJtalkRc) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_open_jtalk_rc_use_user_dict: Symbol<
-        'lib,
-        unsafe extern "C" fn(*mut OpenJtalkRc, *const VoicevoxUserDict) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_open_jtalk_rc_delete: Symbol<'lib, unsafe extern "C" fn(*mut OpenJtalkRc)>,
-    pub(crate) voicevox_make_default_initialize_options:
-        Symbol<'lib, unsafe extern "C" fn() -> VoicevoxInitializeOptions>,
-    pub(crate) voicevox_get_version: Symbol<'lib, unsafe extern "C" fn() -> *const c_char>,
-    pub(crate) voicevox_voice_model_new_from_path: Symbol<
-        'lib,
-        unsafe extern "C" fn(*const c_char, *mut *mut VoicevoxVoiceModel) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_voice_model_id:
-        Symbol<'lib, unsafe extern "C" fn(*const VoicevoxVoiceModel) -> VoicevoxVoiceModelId>,
-    pub(crate) voicevox_voice_model_get_metas_json:
-        Symbol<'lib, unsafe extern "C" fn(*const VoicevoxVoiceModel) -> *const c_char>,
-    pub(crate) voicevox_voice_model_delete:
-        Symbol<'lib, unsafe extern "C" fn(*mut VoicevoxVoiceModel)>,
-    pub(crate) voicevox_synthesizer_new: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            *const OpenJtalkRc,
-            VoicevoxInitializeOptions,
-            *mut *mut VoicevoxSynthesizer,
-        ) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_synthesizer_delete:
-        Symbol<'lib, unsafe extern "C" fn(*mut VoicevoxSynthesizer)>,
-    pub(crate) voicevox_synthesizer_load_voice_model: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            *mut VoicevoxSynthesizer,
-            *const VoicevoxVoiceModel,
-        ) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_synthesizer_unload_voice_model: Symbol<
-        'lib,
-        unsafe extern "C" fn(*mut VoicevoxSynthesizer, VoicevoxVoiceModelId) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_synthesizer_is_gpu_mode:
-        Symbol<'lib, unsafe extern "C" fn(*const VoicevoxSynthesizer) -> bool>,
-    pub(crate) voicevox_synthesizer_is_loaded_voice_model: Symbol<
-        'lib,
-        unsafe extern "C" fn(*const VoicevoxSynthesizer, VoicevoxVoiceModelId) -> bool,
-    >,
-    pub(crate) voicevox_synthesizer_create_metas_json:
-        Symbol<'lib, unsafe extern "C" fn(*const VoicevoxSynthesizer) -> *mut c_char>,
-    pub(crate) voicevox_create_supported_devices_json:
-        Symbol<'lib, unsafe extern "C" fn(*mut *mut c_char) -> VoicevoxResultCode>,
-    pub(crate) voicevox_synthesizer_create_audio_query_from_kana: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            *const VoicevoxSynthesizer,
-            *const c_char,
-            VoicevoxStyleId,
-            *mut *mut c_char,
-        ) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_synthesizer_create_audio_query: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            *const VoicevoxSynthesizer,
-            *const c_char,
-            VoicevoxStyleId,
-            *mut *mut c_char,
-        ) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_make_default_synthesis_options:
-        Symbol<'lib, unsafe extern "C" fn() -> VoicevoxSynthesisOptions>,
-    pub(crate) voicevox_synthesizer_synthesis: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            *const VoicevoxSynthesizer,
-            *const c_char,
-            VoicevoxStyleId,
-            VoicevoxSynthesisOptions,
-            *mut usize,
-            *mut *mut u8,
-        ) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_make_default_tts_options:
-        Symbol<'lib, unsafe extern "C" fn() -> VoicevoxTtsOptions>,
-    pub(crate) voicevox_synthesizer_tts_from_kana: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            *const VoicevoxSynthesizer,
-            *const c_char,
-            VoicevoxStyleId,
-            VoicevoxTtsOptions,
-            *mut usize,
-            *mut *mut u8,
-        ) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_synthesizer_tts: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            *const VoicevoxSynthesizer,
-            *const c_char,
-            VoicevoxStyleId,
-            VoicevoxTtsOptions,
-            *mut usize,
-            *mut *mut u8,
-        ) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_json_free: Symbol<'lib, unsafe extern "C" fn(*mut c_char)>,
-    pub(crate) voicevox_wav_free: Symbol<'lib, unsafe extern "C" fn(*mut u8)>,
-    pub(crate) voicevox_error_result_to_message:
-        Symbol<'lib, unsafe extern "C" fn(VoicevoxResultCode) -> *const c_char>,
-
-    pub(crate) initialize: Symbol<'lib, unsafe extern "C" fn(bool, c_int, bool) -> bool>,
-    pub(crate) load_model: Symbol<'lib, unsafe extern "C" fn(i64) -> bool>,
-    pub(crate) is_model_loaded: Symbol<'lib, unsafe extern "C" fn(i64) -> bool>,
-    pub(crate) finalize: Symbol<'lib, unsafe extern "C" fn()>,
-    pub(crate) metas: Symbol<'lib, unsafe extern "C" fn() -> *const c_char>,
-    pub(crate) last_error_message: Symbol<'lib, unsafe extern "C" fn() -> *const c_char>,
-    pub(crate) supported_devices: Symbol<'lib, unsafe extern "C" fn() -> *const c_char>,
-    pub(crate) yukarin_s_forward:
-        Symbol<'lib, unsafe extern "C" fn(i64, *mut i64, *mut i64, *mut f32) -> bool>,
-    pub(crate) yukarin_sa_forward: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            i64,
-            *mut i64,
-            *mut i64,
-            *mut i64,
-            *mut i64,
-            *mut i64,
-            *mut i64,
-            *mut i64,
-            *mut f32,
-        ) -> bool,
-    >,
-    pub(crate) decode_forward: Symbol<
-        'lib,
-        unsafe extern "C" fn(i64, i64, *mut f32, *mut f32, *mut i64, *mut f32) -> bool,
-    >,
-
-    pub(crate) voicevox_user_dict_word_make:
-        Symbol<'lib, unsafe extern "C" fn(*const c_char, *const c_char) -> VoicevoxUserDictWord>,
-    pub(crate) voicevox_user_dict_new:
-        Symbol<'lib, unsafe extern "C" fn() -> *mut VoicevoxUserDict>,
-    pub(crate) voicevox_user_dict_load: Symbol<
-        'lib,
-        unsafe extern "C" fn(*const VoicevoxUserDict, *const c_char) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_user_dict_add_word: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            *const VoicevoxUserDict,
-            *const VoicevoxUserDictWord,
-            *mut [u8; 16],
-        ) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_user_dict_update_word: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            *const VoicevoxUserDict,
-            *const [u8; 16],
-            *const VoicevoxUserDictWord,
-        ) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_user_dict_remove_word: Symbol<
-        'lib,
-        unsafe extern "C" fn(*const VoicevoxUserDict, *const [u8; 16]) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_user_dict_to_json: Symbol<
-        'lib,
-        unsafe extern "C" fn(*const VoicevoxUserDict, *mut *mut c_char) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_user_dict_import: Symbol<
-        'lib,
-        unsafe extern "C" fn(
-            *const VoicevoxUserDict,
-            *const VoicevoxUserDict,
-        ) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_user_dict_save: Symbol<
-        'lib,
-        unsafe extern "C" fn(*const VoicevoxUserDict, *const c_char) -> VoicevoxResultCode,
-    >,
-    pub(crate) voicevox_user_dict_delete:
-        Symbol<'lib, unsafe extern "C" fn(*mut VoicevoxUserDict) -> VoicevoxResultCode>,
-}
-
-impl<'lib> Symbols<'lib> {
-    pub(crate) unsafe fn new(lib: &'lib Library) -> Result<Self, libloading::Error> {
-        macro_rules! new(($($name:ident),* $(,)?) => {
-            Self {
-                $(
-                    $name: lib.get(stringify!($name).as_ref())?,
-                )*
-            }
-        });
-
-        Ok(new!(
-            voicevox_open_jtalk_rc_new,
-            voicevox_open_jtalk_rc_use_user_dict,
-            voicevox_open_jtalk_rc_delete,
-            voicevox_make_default_initialize_options,
-            voicevox_get_version,
-            voicevox_voice_model_new_from_path,
-            voicevox_voice_model_id,
-            voicevox_voice_model_get_metas_json,
-            voicevox_voice_model_delete,
-            voicevox_synthesizer_new,
-            voicevox_synthesizer_delete,
-            voicevox_synthesizer_load_voice_model,
-            voicevox_synthesizer_unload_voice_model,
-            voicevox_synthesizer_is_gpu_mode,
-            voicevox_synthesizer_is_loaded_voice_model,
-            voicevox_synthesizer_create_metas_json,
-            voicevox_create_supported_devices_json,
-            voicevox_synthesizer_create_audio_query_from_kana,
-            voicevox_synthesizer_create_audio_query,
-            voicevox_make_default_synthesis_options,
-            voicevox_synthesizer_synthesis,
-            voicevox_make_default_tts_options,
-            voicevox_synthesizer_tts_from_kana,
-            voicevox_synthesizer_tts,
-            voicevox_json_free,
-            voicevox_wav_free,
-            voicevox_error_result_to_message,
-            initialize,
-            load_model,
-            is_model_loaded,
-            finalize,
-            metas,
-            last_error_message,
-            supported_devices,
-            yukarin_s_forward,
-            yukarin_sa_forward,
-            decode_forward,
-            voicevox_user_dict_word_make,
-            voicevox_user_dict_new,
-            voicevox_user_dict_load,
-            voicevox_user_dict_add_word,
-            voicevox_user_dict_update_word,
-            voicevox_user_dict_remove_word,
-            voicevox_user_dict_to_json,
-            voicevox_user_dict_import,
-            voicevox_user_dict_save,
-            voicevox_user_dict_delete,
-        ))
-    }
-}
-
-type OpenJtalkRc = c_void;
-type VoicevoxVoiceModel = c_void;
-type VoicevoxVoiceModelId = *const c_char;
-type VoicevoxSynthesizer = c_void;
-type VoicevoxStyleId = u32;
-
-#[repr(i32)]
-#[derive(Debug, PartialEq, Eq, Clone, Copy, EnumIter)]
-#[allow(non_camel_case_types)]
-pub(crate) enum VoicevoxResultCode {
-    VOICEVOX_RESULT_OK = 0,
-    VOICEVOX_RESULT_NOT_LOADED_OPENJTALK_DICT_ERROR = 1,
-    VOICEVOX_RESULT_GET_SUPPORTED_DEVICES_ERROR = 3,
-    VOICEVOX_RESULT_GPU_SUPPORT_ERROR = 4,
-    VOICEVOX_RESULT_STYLE_NOT_FOUND_ERROR = 6,
-    VOICEVOX_RESULT_MODEL_NOT_FOUND_ERROR = 7,
-    VOICEVOX_RESULT_INFERENCE_ERROR = 8,
-    VOICEVOX_RESULT_EXTRACT_FULL_CONTEXT_LABEL_ERROR = 11,
-    VOICEVOX_RESULT_INVALID_UTF8_INPUT_ERROR = 12,
-    VOICEVOX_RESULT_PARSE_KANA_ERROR = 13,
-    VOICEVOX_RESULT_INVALID_AUDIO_QUERY_ERROR = 14,
-    VOICEVOX_RESULT_INVALID_ACCENT_PHRASE_ERROR = 15,
-    VOICEVOX_RESULT_OPEN_ZIP_FILE_ERROR = 16,
-    VOICEVOX_RESULT_READ_ZIP_ENTRY_ERROR = 17,
-    VOICEVOX_RESULT_MODEL_ALREADY_LOADED_ERROR = 18,
-    VOICEVOX_RESULT_STYLE_ALREADY_LOADED_ERROR = 26,
-    VOICEVOX_RESULT_INVALID_MODEL_DATA_ERROR = 27,
-    VOICEVOX_RESULT_LOAD_USER_DICT_ERROR = 20,
-    VOICEVOX_RESULT_SAVE_USER_DICT_ERROR = 21,
-    VOICEVOX_RESULT_USER_DICT_WORD_NOT_FOUND_ERROR = 22,
-    VOICEVOX_RESULT_USE_USER_DICT_ERROR = 23,
-    VOICEVOX_RESULT_INVALID_USER_DICT_WORD_ERROR = 24,
-    VOICEVOX_RESULT_INVALID_UUID_ERROR = 25,
-}
-
-#[repr(i32)]
-#[allow(non_camel_case_types)]
-pub(crate) enum VoicevoxAccelerationMode {
-    VOICEVOX_ACCELERATION_MODE_CPU = 1,
-}
-
-#[repr(C)]
-pub(crate) struct VoicevoxInitializeOptions {
-    pub(crate) acceleration_mode: VoicevoxAccelerationMode,
-    pub(crate) _cpu_num_threads: u16,
-}
-
-#[repr(C)]
-pub(crate) struct VoicevoxSynthesisOptions {
-    _enable_interrogative_upspeak: bool,
-}
-
-#[repr(C)]
-pub(crate) struct VoicevoxTtsOptions {
-    _enable_interrogative_upspeak: bool,
-}
-
-#[repr(C)]
-pub(crate) struct VoicevoxUserDict {
-    _private: [u8; 0],
-}
-
-#[repr(C)]
-pub(crate) struct VoicevoxUserDictWord {
-    pub(crate) surface: *const c_char,
-    pub(crate) pronunciation: *const c_char,
-    pub(crate) accent_type: usize,
-    pub(crate) word_type: VoicevoxUserDictWordType,
-    pub(crate) priority: u32,
-}
-
-#[repr(i32)]
-#[allow(non_camel_case_types)]
-pub(crate) enum VoicevoxUserDictWordType {
-    VOICEVOX_USER_DICT_WORD_TYPE_PROPER_NOUN = 0,
-}
diff --git a/crates/voicevox_core_c_api/tests/e2e/testcases/compatible_engine.rs b/crates/voicevox_core_c_api/tests/e2e/testcases/compatible_engine.rs
index 41968aa8f..c2fc211c2 100644
--- a/crates/voicevox_core_c_api/tests/e2e/testcases/compatible_engine.rs
+++ b/crates/voicevox_core_c_api/tests/e2e/testcases/compatible_engine.rs
@@ -8,12 +8,11 @@ use once_cell::sync::Lazy;
 use serde::{Deserialize, Serialize};
 use voicevox_core::SupportedDevices;
 
-use test_util::EXAMPLE_DATA;
+use test_util::{c_api::CApi, EXAMPLE_DATA};
 
 use crate::{
     assert_cdylib::{self, case, Utf8Output},
     float_assert, snapshots,
-    symbols::Symbols,
 };
 
 case!(TestCase);
@@ -23,43 +22,32 @@ struct TestCase;
 
 #[typetag::serde(name = "compatible_engine")]
 impl assert_cdylib::TestCase for TestCase {
-    unsafe fn exec(&self, lib: &Library) -> anyhow::Result<()> {
-        let Symbols {
-            initialize,
-            load_model,
-            is_model_loaded,
-            finalize,
-            metas,
-            supported_devices,
-            yukarin_s_forward,
-            yukarin_sa_forward,
-            decode_forward,
-            ..
-        } = Symbols::new(lib)?;
+    unsafe fn exec(&self, lib: Library) -> anyhow::Result<()> {
+        let lib = CApi::from_library(lib)?;
 
         let metas_json = {
-            let metas_json = metas();
+            let metas_json = lib.metas();
             let metas_json = CStr::from_ptr(metas_json).to_str()?;
             serde_json::to_string_pretty(&metas_json.parse::<serde_json::Value>()?).unwrap()
         };
 
         let supported_devices = {
-            let supported_devices = supported_devices();
+            let supported_devices = lib.supported_devices();
             CStr::from_ptr(supported_devices)
                 .to_str()?
                 .parse::<serde_json::Value>()?
         };
 
-        assert!(initialize(false, 0, false));
+        assert!(lib.initialize(false, 0, false));
 
-        assert!(!is_model_loaded(EXAMPLE_DATA.speaker_id));
-        assert!(load_model(EXAMPLE_DATA.speaker_id));
-        assert!(is_model_loaded(EXAMPLE_DATA.speaker_id));
+        assert!(!lib.is_model_loaded(EXAMPLE_DATA.speaker_id));
+        assert!(lib.load_model(EXAMPLE_DATA.speaker_id));
+        assert!(lib.is_model_loaded(EXAMPLE_DATA.speaker_id));
 
         // テスト用テキストは"t e s u t o"
         let phoneme_length = {
             let mut phoneme_length = [0.; 8];
-            assert!(yukarin_s_forward(
+            assert!(lib.yukarin_s_forward(
                 EXAMPLE_DATA.duration.length,
                 EXAMPLE_DATA.duration.phoneme_vector.as_ptr() as *mut i64,
                 &mut { EXAMPLE_DATA.speaker_id } as *mut i64,
@@ -70,7 +58,7 @@ impl assert_cdylib::TestCase for TestCase {
 
         let intonation_list = {
             let mut intonation_list = [0.; 5];
-            assert!(yukarin_sa_forward(
+            assert!(lib.yukarin_sa_forward(
                 EXAMPLE_DATA.intonation.length,
                 EXAMPLE_DATA.intonation.vowel_phoneme_vector.as_ptr() as *mut i64,
                 EXAMPLE_DATA.intonation.consonant_phoneme_vector.as_ptr() as *mut i64,
@@ -86,7 +74,7 @@ impl assert_cdylib::TestCase for TestCase {
 
         let wave = {
             let mut wave = vec![0.; 256 * EXAMPLE_DATA.decode.f0_length as usize];
-            assert!(decode_forward(
+            assert!(lib.decode_forward(
                 EXAMPLE_DATA.decode.f0_length,
                 EXAMPLE_DATA.decode.phoneme_size,
                 EXAMPLE_DATA.decode.f0_vector.as_ptr() as *mut f32,
@@ -108,7 +96,7 @@ impl assert_cdylib::TestCase for TestCase {
 
         assert!(wave.iter().copied().all(f32::is_normal));
 
-        finalize();
+        lib.finalize();
         Ok(())
     }
 
diff --git a/crates/voicevox_core_c_api/tests/e2e/testcases/compatible_engine_load_model_before_initialize.rs b/crates/voicevox_core_c_api/tests/e2e/testcases/compatible_engine_load_model_before_initialize.rs
index 4ea024a98..173e32f8c 100644
--- a/crates/voicevox_core_c_api/tests/e2e/testcases/compatible_engine_load_model_before_initialize.rs
+++ b/crates/voicevox_core_c_api/tests/e2e/testcases/compatible_engine_load_model_before_initialize.rs
@@ -6,11 +6,11 @@ use assert_cmd::assert::AssertResult;
 use libloading::Library;
 use once_cell::sync::Lazy;
 use serde::{Deserialize, Serialize};
+use test_util::c_api::CApi;
 
 use crate::{
     assert_cdylib::{self, case, Utf8Output},
     snapshots,
-    symbols::Symbols,
 };
 
 case!(TestCase);
@@ -20,15 +20,11 @@ struct TestCase;
 
 #[typetag::serde(name = "compatible_engine_load_model_before_initialize")]
 impl assert_cdylib::TestCase for TestCase {
-    unsafe fn exec(&self, lib: &Library) -> anyhow::Result<()> {
-        let Symbols {
-            load_model,
-            last_error_message,
-            ..
-        } = Symbols::new(lib)?;
-
-        assert!(!load_model(0));
-        let last_error_message = last_error_message();
+    unsafe fn exec(&self, lib: Library) -> anyhow::Result<()> {
+        let lib = CApi::from_library(lib)?;
+
+        assert!(!lib.load_model(0));
+        let last_error_message = lib.last_error_message();
         let last_error_message = CStr::from_ptr(last_error_message).to_str()?;
 
         std::assert_eq!(SNAPSHOTS.last_error_message, last_error_message);
diff --git a/crates/voicevox_core_c_api/tests/e2e/testcases/global_info.rs b/crates/voicevox_core_c_api/tests/e2e/testcases/global_info.rs
index 200477b02..c6ea390ed 100644
--- a/crates/voicevox_core_c_api/tests/e2e/testcases/global_info.rs
+++ b/crates/voicevox_core_c_api/tests/e2e/testcases/global_info.rs
@@ -5,13 +5,12 @@ use libloading::Library;
 use once_cell::sync::Lazy;
 use serde::{Deserialize, Serialize};
 use serde_with::{serde_as, DisplayFromStr};
-use strum::IntoEnumIterator;
+use test_util::c_api::{self, CApi, VoicevoxResultCode};
 use voicevox_core::SupportedDevices;
 
 use crate::{
     assert_cdylib::{self, case, Utf8Output},
     snapshots,
-    symbols::{Symbols, VoicevoxResultCode},
 };
 
 case!(TestCase);
@@ -21,25 +20,17 @@ struct TestCase;
 
 #[typetag::serde(name = "global_info")]
 impl assert_cdylib::TestCase for TestCase {
-    unsafe fn exec(&self, lib: &Library) -> anyhow::Result<()> {
-        let Symbols {
-            voicevox_get_version,
-            voicevox_create_supported_devices_json,
-            voicevox_error_result_to_message,
-            voicevox_json_free,
-            ..
-        } = Symbols::new(lib)?;
+    unsafe fn exec(&self, lib: Library) -> anyhow::Result<()> {
+        let lib = CApi::from_library(lib)?;
 
         std::assert_eq!(
             env!("CARGO_PKG_VERSION"),
-            CStr::from_ptr(voicevox_get_version()).to_str()?,
+            CStr::from_ptr(lib.voicevox_get_version()).to_str()?,
         );
 
         {
             let mut supported_devices = MaybeUninit::uninit();
-            assert_ok(voicevox_create_supported_devices_json(
-                supported_devices.as_mut_ptr(),
-            ));
+            assert_ok(lib.voicevox_create_supported_devices_json(supported_devices.as_mut_ptr()));
             let supported_devices = supported_devices.assume_init();
             std::assert_eq!(
                 SupportedDevices::create()?.to_json(),
@@ -47,21 +38,45 @@ impl assert_cdylib::TestCase for TestCase {
                     .to_str()?
                     .parse::<serde_json::Value>()?,
             );
-            voicevox_json_free(supported_devices);
+            lib.voicevox_json_free(supported_devices);
         }
 
-        for result_code in VoicevoxResultCode::iter() {
+        for result_code in [
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_OK,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_NOT_LOADED_OPENJTALK_DICT_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_GET_SUPPORTED_DEVICES_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_GPU_SUPPORT_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_STYLE_NOT_FOUND_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_MODEL_NOT_FOUND_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_INFERENCE_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_EXTRACT_FULL_CONTEXT_LABEL_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_INVALID_UTF8_INPUT_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_PARSE_KANA_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_INVALID_AUDIO_QUERY_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_INVALID_ACCENT_PHRASE_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_OPEN_ZIP_FILE_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_READ_ZIP_ENTRY_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_MODEL_ALREADY_LOADED_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_STYLE_ALREADY_LOADED_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_INVALID_MODEL_DATA_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_LOAD_USER_DICT_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_SAVE_USER_DICT_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_USER_DICT_WORD_NOT_FOUND_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_USE_USER_DICT_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_INVALID_USER_DICT_WORD_ERROR,
+            c_api::VoicevoxResultCode_VOICEVOX_RESULT_INVALID_UUID_ERROR,
+        ] {
             std::assert_eq!(
-                SNAPSHOTS.result_messages[&(result_code as _)],
+                SNAPSHOTS.result_messages[&result_code],
                 str::from_utf8(
-                    CStr::from_ptr(voicevox_error_result_to_message(result_code)).to_bytes()
+                    CStr::from_ptr(lib.voicevox_error_result_to_message(result_code)).to_bytes()
                 )?,
             );
         }
         return Ok(());
 
         fn assert_ok(result_code: VoicevoxResultCode) {
-            std::assert_eq!(VoicevoxResultCode::VOICEVOX_RESULT_OK, result_code);
+            std::assert_eq!(c_api::VoicevoxResultCode_VOICEVOX_RESULT_OK, result_code);
         }
     }
 
diff --git a/crates/voicevox_core_c_api/tests/e2e/testcases/simple_tts.rs b/crates/voicevox_core_c_api/tests/e2e/testcases/simple_tts.rs
index 9631249fa..4ac4030e1 100644
--- a/crates/voicevox_core_c_api/tests/e2e/testcases/simple_tts.rs
+++ b/crates/voicevox_core_c_api/tests/e2e/testcases/simple_tts.rs
@@ -1,16 +1,17 @@
 use std::{collections::HashMap, ffi::CString, mem::MaybeUninit};
 
 use assert_cmd::assert::AssertResult;
-use cstr::cstr;
 use libloading::Library;
 use once_cell::sync::Lazy;
 use serde::{Deserialize, Serialize};
-use test_util::OPEN_JTALK_DIC_DIR;
+use test_util::{
+    c_api::{self, CApi, VoicevoxInitializeOptions, VoicevoxResultCode},
+    OPEN_JTALK_DIC_DIR,
+};
 
 use crate::{
     assert_cdylib::{self, case, Utf8Output},
     snapshots,
-    symbols::{Symbols, VoicevoxAccelerationMode, VoicevoxInitializeOptions, VoicevoxResultCode},
 };
 
 case!(TestCase {
@@ -24,26 +25,13 @@ struct TestCase {
 
 #[typetag::serde(name = "simple_tts")]
 impl assert_cdylib::TestCase for TestCase {
-    unsafe fn exec(&self, lib: &Library) -> anyhow::Result<()> {
-        let Symbols {
-            voicevox_open_jtalk_rc_new,
-            voicevox_open_jtalk_rc_delete,
-            voicevox_make_default_initialize_options,
-            voicevox_voice_model_new_from_path,
-            voicevox_voice_model_delete,
-            voicevox_synthesizer_new,
-            voicevox_synthesizer_delete,
-            voicevox_synthesizer_load_voice_model,
-            voicevox_make_default_tts_options,
-            voicevox_synthesizer_tts,
-            voicevox_wav_free,
-            ..
-        } = Symbols::new(lib)?;
+    unsafe fn exec(&self, lib: Library) -> anyhow::Result<()> {
+        let lib = CApi::from_library(lib)?;
 
         let model = {
             let mut model = MaybeUninit::uninit();
-            assert_ok(voicevox_voice_model_new_from_path(
-                cstr!("../../model/sample.vvm").as_ptr(),
+            assert_ok(lib.voicevox_voice_model_new_from_path(
+                c_api::SAMPLE_VOICE_MODEL_FILE_PATH.as_ptr(),
                 model.as_mut_ptr(),
             ));
             model.assume_init()
@@ -52,37 +40,37 @@ impl assert_cdylib::TestCase for TestCase {
         let openjtalk = {
             let mut openjtalk = MaybeUninit::uninit();
             let open_jtalk_dic_dir = CString::new(OPEN_JTALK_DIC_DIR).unwrap();
-            assert_ok(voicevox_open_jtalk_rc_new(
-                open_jtalk_dic_dir.as_ptr(),
-                openjtalk.as_mut_ptr(),
-            ));
+            assert_ok(
+                lib.voicevox_open_jtalk_rc_new(open_jtalk_dic_dir.as_ptr(), openjtalk.as_mut_ptr()),
+            );
             openjtalk.assume_init()
         };
 
         let synthesizer = {
             let mut synthesizer = MaybeUninit::uninit();
-            assert_ok(voicevox_synthesizer_new(
+            assert_ok(lib.voicevox_synthesizer_new(
                 openjtalk,
                 VoicevoxInitializeOptions {
-                    acceleration_mode: VoicevoxAccelerationMode::VOICEVOX_ACCELERATION_MODE_CPU,
-                    ..voicevox_make_default_initialize_options()
+                    acceleration_mode:
+                        c_api::VoicevoxAccelerationMode_VOICEVOX_ACCELERATION_MODE_CPU,
+                    ..lib.voicevox_make_default_initialize_options()
                 },
                 synthesizer.as_mut_ptr(),
             ));
             synthesizer.assume_init()
         };
 
-        assert_ok(voicevox_synthesizer_load_voice_model(synthesizer, model));
+        assert_ok(lib.voicevox_synthesizer_load_voice_model(synthesizer, model));
 
         let (wav_length, wav) = {
             let mut wav_length = MaybeUninit::uninit();
             let mut wav = MaybeUninit::uninit();
             let text = CString::new(&*self.text).unwrap();
-            assert_ok(voicevox_synthesizer_tts(
+            assert_ok(lib.voicevox_synthesizer_tts(
                 synthesizer,
                 text.as_ptr(),
                 STYLE_ID,
-                voicevox_make_default_tts_options(),
+                lib.voicevox_make_default_tts_options(),
                 wav_length.as_mut_ptr(),
                 wav.as_mut_ptr(),
             ));
@@ -91,17 +79,17 @@ impl assert_cdylib::TestCase for TestCase {
 
         std::assert_eq!(SNAPSHOTS.output[&self.text].wav_length, wav_length);
 
-        voicevox_voice_model_delete(model);
-        voicevox_open_jtalk_rc_delete(openjtalk);
-        voicevox_synthesizer_delete(synthesizer);
-        voicevox_wav_free(wav);
+        lib.voicevox_voice_model_delete(model);
+        lib.voicevox_open_jtalk_rc_delete(openjtalk);
+        lib.voicevox_synthesizer_delete(synthesizer);
+        lib.voicevox_wav_free(wav);
 
         return Ok(());
 
         const STYLE_ID: u32 = 0;
 
         fn assert_ok(result_code: VoicevoxResultCode) {
-            std::assert_eq!(VoicevoxResultCode::VOICEVOX_RESULT_OK, result_code);
+            std::assert_eq!(c_api::VoicevoxResultCode_VOICEVOX_RESULT_OK, result_code);
         }
     }
 
diff --git a/crates/voicevox_core_c_api/tests/e2e/testcases/synthesizer_new_output_json.rs b/crates/voicevox_core_c_api/tests/e2e/testcases/synthesizer_new_output_json.rs
index a836a409c..c27bd4703 100644
--- a/crates/voicevox_core_c_api/tests/e2e/testcases/synthesizer_new_output_json.rs
+++ b/crates/voicevox_core_c_api/tests/e2e/testcases/synthesizer_new_output_json.rs
@@ -4,17 +4,18 @@ use std::{
 };
 
 use assert_cmd::assert::AssertResult;
-use cstr::cstr;
 use libloading::Library;
 use once_cell::sync::Lazy;
 use serde::{Deserialize, Serialize};
 
-use test_util::OPEN_JTALK_DIC_DIR;
+use test_util::{
+    c_api::{self, CApi, VoicevoxInitializeOptions, VoicevoxResultCode},
+    OPEN_JTALK_DIC_DIR,
+};
 
 use crate::{
     assert_cdylib::{self, case, Utf8Output},
     snapshots,
-    symbols::{Symbols, VoicevoxAccelerationMode, VoicevoxInitializeOptions, VoicevoxResultCode},
 };
 
 case!(TestCase);
@@ -24,37 +25,26 @@ struct TestCase;
 
 #[typetag::serde(name = "synthesizer_new_output_json")]
 impl assert_cdylib::TestCase for TestCase {
-    unsafe fn exec(&self, lib: &Library) -> anyhow::Result<()> {
-        let Symbols {
-            voicevox_make_default_initialize_options,
-            voicevox_voice_model_new_from_path,
-            voicevox_open_jtalk_rc_new,
-            voicevox_open_jtalk_rc_delete,
-            voicevox_synthesizer_new,
-            voicevox_synthesizer_delete,
-            voicevox_synthesizer_create_metas_json,
-            voicevox_synthesizer_load_voice_model,
-            voicevox_json_free,
-            ..
-        } = Symbols::new(lib)?;
+    unsafe fn exec(&self, lib: Library) -> anyhow::Result<()> {
+        let lib = CApi::from_library(lib)?;
 
         let openjtalk = {
             let mut openjtalk = MaybeUninit::uninit();
             let open_jtalk_dic_dir = CString::new(OPEN_JTALK_DIC_DIR).unwrap();
-            assert_ok(voicevox_open_jtalk_rc_new(
-                open_jtalk_dic_dir.as_ptr(),
-                openjtalk.as_mut_ptr(),
-            ));
+            assert_ok(
+                lib.voicevox_open_jtalk_rc_new(open_jtalk_dic_dir.as_ptr(), openjtalk.as_mut_ptr()),
+            );
             openjtalk.assume_init()
         };
 
         let synthesizer = {
             let mut synthesizer = MaybeUninit::uninit();
-            assert_ok(voicevox_synthesizer_new(
+            assert_ok(lib.voicevox_synthesizer_new(
                 openjtalk,
                 VoicevoxInitializeOptions {
-                    acceleration_mode: VoicevoxAccelerationMode::VOICEVOX_ACCELERATION_MODE_CPU,
-                    ..voicevox_make_default_initialize_options()
+                    acceleration_mode:
+                        c_api::VoicevoxAccelerationMode_VOICEVOX_ACCELERATION_MODE_CPU,
+                    ..lib.voicevox_make_default_initialize_options()
                 },
                 synthesizer.as_mut_ptr(),
             ));
@@ -63,32 +53,32 @@ impl assert_cdylib::TestCase for TestCase {
 
         let model = {
             let mut model = MaybeUninit::uninit();
-            assert_ok(voicevox_voice_model_new_from_path(
-                cstr!("../../model/sample.vvm").as_ptr(),
+            assert_ok(lib.voicevox_voice_model_new_from_path(
+                c_api::SAMPLE_VOICE_MODEL_FILE_PATH.as_ptr(),
                 model.as_mut_ptr(),
             ));
             model.assume_init()
         };
 
-        assert_ok(voicevox_synthesizer_load_voice_model(synthesizer, model));
+        assert_ok(lib.voicevox_synthesizer_load_voice_model(synthesizer, model));
 
         let metas_json = {
-            let raw = voicevox_synthesizer_create_metas_json(synthesizer);
+            let raw = lib.voicevox_synthesizer_create_metas_json(synthesizer);
             let metas_json = &CStr::from_ptr(raw).to_str()?.parse::<serde_json::Value>()?;
             let metas_json = serde_json::to_string_pretty(metas_json).unwrap();
-            voicevox_json_free(raw);
+            lib.voicevox_json_free(raw);
             metas_json
         };
 
         std::assert_eq!(SNAPSHOTS.metas, metas_json);
 
-        voicevox_open_jtalk_rc_delete(openjtalk);
-        voicevox_synthesizer_delete(synthesizer);
+        lib.voicevox_open_jtalk_rc_delete(openjtalk);
+        lib.voicevox_synthesizer_delete(synthesizer);
 
         return Ok(());
 
         fn assert_ok(result_code: VoicevoxResultCode) {
-            std::assert_eq!(VoicevoxResultCode::VOICEVOX_RESULT_OK, result_code);
+            std::assert_eq!(c_api::VoicevoxResultCode_VOICEVOX_RESULT_OK, result_code);
         }
     }
 
diff --git a/crates/voicevox_core_c_api/tests/e2e/testcases/tts_via_audio_query.rs b/crates/voicevox_core_c_api/tests/e2e/testcases/tts_via_audio_query.rs
index 6cfe7994e..d380b71b2 100644
--- a/crates/voicevox_core_c_api/tests/e2e/testcases/tts_via_audio_query.rs
+++ b/crates/voicevox_core_c_api/tests/e2e/testcases/tts_via_audio_query.rs
@@ -1,16 +1,17 @@
 use std::{collections::HashMap, ffi::CString, mem::MaybeUninit};
 
 use assert_cmd::assert::AssertResult;
-use cstr::cstr;
 use libloading::Library;
 use once_cell::sync::Lazy;
 use serde::{Deserialize, Serialize};
-use test_util::OPEN_JTALK_DIC_DIR;
+use test_util::{
+    c_api::{self, CApi, VoicevoxInitializeOptions, VoicevoxResultCode},
+    OPEN_JTALK_DIC_DIR,
+};
 
 use crate::{
     assert_cdylib::{self, case, Utf8Output},
     snapshots,
-    symbols::{Symbols, VoicevoxAccelerationMode, VoicevoxInitializeOptions, VoicevoxResultCode},
 };
 
 case!(TestCase {
@@ -24,28 +25,13 @@ struct TestCase {
 
 #[typetag::serde(name = "tts_via_audio_query")]
 impl assert_cdylib::TestCase for TestCase {
-    unsafe fn exec(&self, lib: &Library) -> anyhow::Result<()> {
-        let Symbols {
-            voicevox_open_jtalk_rc_new,
-            voicevox_open_jtalk_rc_delete,
-            voicevox_make_default_initialize_options,
-            voicevox_voice_model_new_from_path,
-            voicevox_voice_model_delete,
-            voicevox_synthesizer_new,
-            voicevox_synthesizer_delete,
-            voicevox_synthesizer_load_voice_model,
-            voicevox_synthesizer_create_audio_query,
-            voicevox_make_default_synthesis_options,
-            voicevox_synthesizer_synthesis,
-            voicevox_json_free,
-            voicevox_wav_free,
-            ..
-        } = Symbols::new(lib)?;
+    unsafe fn exec(&self, lib: Library) -> anyhow::Result<()> {
+        let lib = CApi::from_library(lib)?;
 
         let model = {
             let mut model = MaybeUninit::uninit();
-            assert_ok(voicevox_voice_model_new_from_path(
-                cstr!("../../model/sample.vvm").as_ptr(),
+            assert_ok(lib.voicevox_voice_model_new_from_path(
+                c_api::SAMPLE_VOICE_MODEL_FILE_PATH.as_ptr(),
                 model.as_mut_ptr(),
             ));
             model.assume_init()
@@ -54,32 +40,32 @@ impl assert_cdylib::TestCase for TestCase {
         let openjtalk = {
             let mut openjtalk = MaybeUninit::uninit();
             let open_jtalk_dic_dir = CString::new(OPEN_JTALK_DIC_DIR).unwrap();
-            assert_ok(voicevox_open_jtalk_rc_new(
-                open_jtalk_dic_dir.as_ptr(),
-                openjtalk.as_mut_ptr(),
-            ));
+            assert_ok(
+                lib.voicevox_open_jtalk_rc_new(open_jtalk_dic_dir.as_ptr(), openjtalk.as_mut_ptr()),
+            );
             openjtalk.assume_init()
         };
 
         let synthesizer = {
             let mut synthesizer = MaybeUninit::uninit();
-            assert_ok(voicevox_synthesizer_new(
+            assert_ok(lib.voicevox_synthesizer_new(
                 openjtalk,
                 VoicevoxInitializeOptions {
-                    acceleration_mode: VoicevoxAccelerationMode::VOICEVOX_ACCELERATION_MODE_CPU,
-                    ..voicevox_make_default_initialize_options()
+                    acceleration_mode:
+                        c_api::VoicevoxAccelerationMode_VOICEVOX_ACCELERATION_MODE_CPU,
+                    ..lib.voicevox_make_default_initialize_options()
                 },
                 synthesizer.as_mut_ptr(),
             ));
             synthesizer.assume_init()
         };
 
-        assert_ok(voicevox_synthesizer_load_voice_model(synthesizer, model));
+        assert_ok(lib.voicevox_synthesizer_load_voice_model(synthesizer, model));
 
         let audio_query = {
             let mut audio_query = MaybeUninit::uninit();
             let text = CString::new(&*self.text).unwrap();
-            assert_ok(voicevox_synthesizer_create_audio_query(
+            assert_ok(lib.voicevox_synthesizer_create_audio_query(
                 synthesizer,
                 text.as_ptr(),
                 STYLE_ID,
@@ -91,11 +77,11 @@ impl assert_cdylib::TestCase for TestCase {
         let (wav_length, wav) = {
             let mut wav_length = MaybeUninit::uninit();
             let mut wav = MaybeUninit::uninit();
-            assert_ok(voicevox_synthesizer_synthesis(
+            assert_ok(lib.voicevox_synthesizer_synthesis(
                 synthesizer,
                 audio_query,
                 STYLE_ID,
-                voicevox_make_default_synthesis_options(),
+                lib.voicevox_make_default_synthesis_options(),
                 wav_length.as_mut_ptr(),
                 wav.as_mut_ptr(),
             ));
@@ -104,18 +90,18 @@ impl assert_cdylib::TestCase for TestCase {
 
         std::assert_eq!(SNAPSHOTS.output[&self.text].wav_length, wav_length);
 
-        voicevox_voice_model_delete(model);
-        voicevox_open_jtalk_rc_delete(openjtalk);
-        voicevox_synthesizer_delete(synthesizer);
-        voicevox_json_free(audio_query);
-        voicevox_wav_free(wav);
+        lib.voicevox_voice_model_delete(model);
+        lib.voicevox_open_jtalk_rc_delete(openjtalk);
+        lib.voicevox_synthesizer_delete(synthesizer);
+        lib.voicevox_json_free(audio_query);
+        lib.voicevox_wav_free(wav);
 
         return Ok(());
 
         const STYLE_ID: u32 = 0;
 
         fn assert_ok(result_code: VoicevoxResultCode) {
-            std::assert_eq!(VoicevoxResultCode::VOICEVOX_RESULT_OK, result_code);
+            std::assert_eq!(c_api::VoicevoxResultCode_VOICEVOX_RESULT_OK, result_code);
         }
     }
 
diff --git a/crates/voicevox_core_c_api/tests/e2e/testcases/user_dict_load.rs b/crates/voicevox_core_c_api/tests/e2e/testcases/user_dict_load.rs
index 7c2e13afe..2e6875e97 100644
--- a/crates/voicevox_core_c_api/tests/e2e/testcases/user_dict_load.rs
+++ b/crates/voicevox_core_c_api/tests/e2e/testcases/user_dict_load.rs
@@ -1,7 +1,6 @@
 // ユーザー辞書の登録によって読みが変化することを確認するテスト。
 // 辞書ロード前後でAudioQueryのkanaが変化するかどうかで確認する。
 
-use crate::symbols::{VoicevoxInitializeOptions, VoicevoxResultCode};
 use assert_cmd::assert::AssertResult;
 use once_cell::sync::Lazy;
 use std::ffi::{CStr, CString};
@@ -11,11 +10,11 @@ use test_util::OPEN_JTALK_DIC_DIR;
 use cstr::cstr;
 use libloading::Library;
 use serde::{Deserialize, Serialize};
+use test_util::c_api::{self, CApi, VoicevoxInitializeOptions, VoicevoxResultCode};
 
 use crate::{
     assert_cdylib::{self, case, Utf8Output},
     snapshots,
-    symbols::{Symbols, VoicevoxAccelerationMode, VoicevoxUserDictWordType},
 };
 
 case!(TestCase);
@@ -25,46 +24,31 @@ struct TestCase;
 
 #[typetag::serde(name = "user_dict_load")]
 impl assert_cdylib::TestCase for TestCase {
-    unsafe fn exec(&self, lib: &Library) -> anyhow::Result<()> {
-        let Symbols {
-            voicevox_user_dict_word_make,
-            voicevox_user_dict_new,
-            voicevox_user_dict_add_word,
-            voicevox_user_dict_delete,
-            voicevox_make_default_initialize_options,
-            voicevox_open_jtalk_rc_new,
-            voicevox_open_jtalk_rc_use_user_dict,
-            voicevox_open_jtalk_rc_delete,
-            voicevox_voice_model_new_from_path,
-            voicevox_voice_model_delete,
-            voicevox_synthesizer_new,
-            voicevox_synthesizer_delete,
-            voicevox_synthesizer_load_voice_model,
-            voicevox_synthesizer_create_audio_query,
-            ..
-        } = Symbols::new(lib)?;
-
-        let dict = voicevox_user_dict_new();
+    unsafe fn exec(&self, lib: Library) -> anyhow::Result<()> {
+        let lib = CApi::from_library(lib)?;
+
+        let dict = lib.voicevox_user_dict_new();
 
         let mut word_uuid = [0u8; 16];
 
         let word = {
-            let mut word = voicevox_user_dict_word_make(
+            let mut word = lib.voicevox_user_dict_word_make(
                 cstr!("this_word_should_not_exist_in_default_dictionary").as_ptr(),
                 cstr!("アイウエオ").as_ptr(),
             );
-            word.word_type = VoicevoxUserDictWordType::VOICEVOX_USER_DICT_WORD_TYPE_PROPER_NOUN;
+            word.word_type =
+                c_api::VoicevoxUserDictWordType_VOICEVOX_USER_DICT_WORD_TYPE_PROPER_NOUN;
             word.priority = 10;
 
             word
         };
 
-        assert_ok(voicevox_user_dict_add_word(dict, &word, &mut word_uuid));
+        assert_ok(lib.voicevox_user_dict_add_word(dict, &word, &mut word_uuid));
 
         let model = {
             let mut model = MaybeUninit::uninit();
-            assert_ok(voicevox_voice_model_new_from_path(
-                cstr!("../../model/sample.vvm").as_ptr(),
+            assert_ok(lib.voicevox_voice_model_new_from_path(
+                c_api::SAMPLE_VOICE_MODEL_FILE_PATH.as_ptr(),
                 model.as_mut_ptr(),
             ));
             model.assume_init()
@@ -73,30 +57,30 @@ impl assert_cdylib::TestCase for TestCase {
         let openjtalk = {
             let mut openjtalk = MaybeUninit::uninit();
             let open_jtalk_dic_dir = CString::new(OPEN_JTALK_DIC_DIR).unwrap();
-            assert_ok(voicevox_open_jtalk_rc_new(
-                open_jtalk_dic_dir.as_ptr(),
-                openjtalk.as_mut_ptr(),
-            ));
+            assert_ok(
+                lib.voicevox_open_jtalk_rc_new(open_jtalk_dic_dir.as_ptr(), openjtalk.as_mut_ptr()),
+            );
             openjtalk.assume_init()
         };
 
         let synthesizer = {
             let mut synthesizer = MaybeUninit::uninit();
-            assert_ok(voicevox_synthesizer_new(
+            assert_ok(lib.voicevox_synthesizer_new(
                 openjtalk,
                 VoicevoxInitializeOptions {
-                    acceleration_mode: VoicevoxAccelerationMode::VOICEVOX_ACCELERATION_MODE_CPU,
-                    ..voicevox_make_default_initialize_options()
+                    acceleration_mode:
+                        c_api::VoicevoxAccelerationMode_VOICEVOX_ACCELERATION_MODE_CPU,
+                    ..lib.voicevox_make_default_initialize_options()
                 },
                 synthesizer.as_mut_ptr(),
             ));
             synthesizer.assume_init()
         };
 
-        assert_ok(voicevox_synthesizer_load_voice_model(synthesizer, model));
+        assert_ok(lib.voicevox_synthesizer_load_voice_model(synthesizer, model));
 
         let mut audio_query_without_dict = std::ptr::null_mut();
-        assert_ok(voicevox_synthesizer_create_audio_query(
+        assert_ok(lib.voicevox_synthesizer_create_audio_query(
             synthesizer,
             cstr!("this_word_should_not_exist_in_default_dictionary").as_ptr(),
             STYLE_ID,
@@ -106,10 +90,10 @@ impl assert_cdylib::TestCase for TestCase {
             CStr::from_ptr(audio_query_without_dict).to_str()?,
         )?;
 
-        assert_ok(voicevox_open_jtalk_rc_use_user_dict(openjtalk, dict));
+        assert_ok(lib.voicevox_open_jtalk_rc_use_user_dict(openjtalk, dict));
 
         let mut audio_query_with_dict = std::ptr::null_mut();
-        assert_ok(voicevox_synthesizer_create_audio_query(
+        assert_ok(lib.voicevox_synthesizer_create_audio_query(
             synthesizer,
             cstr!("this_word_should_not_exist_in_default_dictionary").as_ptr(),
             STYLE_ID,
@@ -125,15 +109,15 @@ impl assert_cdylib::TestCase for TestCase {
             audio_query_with_dict.get("kana")
         );
 
-        voicevox_voice_model_delete(model);
-        voicevox_open_jtalk_rc_delete(openjtalk);
-        voicevox_synthesizer_delete(synthesizer);
-        voicevox_user_dict_delete(dict);
+        lib.voicevox_voice_model_delete(model);
+        lib.voicevox_open_jtalk_rc_delete(openjtalk);
+        lib.voicevox_synthesizer_delete(synthesizer);
+        lib.voicevox_user_dict_delete(dict);
 
         return Ok(());
 
         fn assert_ok(result_code: VoicevoxResultCode) {
-            std::assert_eq!(VoicevoxResultCode::VOICEVOX_RESULT_OK, result_code);
+            std::assert_eq!(c_api::VoicevoxResultCode_VOICEVOX_RESULT_OK, result_code);
         }
         const STYLE_ID: u32 = 0;
     }
diff --git a/crates/voicevox_core_c_api/tests/e2e/testcases/user_dict_manipulate.rs b/crates/voicevox_core_c_api/tests/e2e/testcases/user_dict_manipulate.rs
index 15b80686f..fd3d575e3 100644
--- a/crates/voicevox_core_c_api/tests/e2e/testcases/user_dict_manipulate.rs
+++ b/crates/voicevox_core_c_api/tests/e2e/testcases/user_dict_manipulate.rs
@@ -12,11 +12,11 @@ use uuid::Uuid;
 use cstr::cstr;
 use libloading::Library;
 use serde::{Deserialize, Serialize};
+use test_util::c_api::{self, CApi, VoicevoxResultCode, VoicevoxUserDict, VoicevoxUserDictWord};
 
 use crate::{
     assert_cdylib::{self, case, Utf8Output},
     snapshots,
-    symbols::{Symbols, VoicevoxResultCode, VoicevoxUserDict, VoicevoxUserDictWord},
 };
 
 case!(TestCase);
@@ -26,35 +26,19 @@ struct TestCase;
 
 #[typetag::serde(name = "user_dict_manipulate")]
 impl assert_cdylib::TestCase for TestCase {
-    unsafe fn exec(&self, lib: &Library) -> anyhow::Result<()> {
-        let Symbols {
-            voicevox_user_dict_word_make,
-            voicevox_user_dict_new,
-            voicevox_user_dict_add_word,
-            voicevox_user_dict_update_word,
-            voicevox_user_dict_remove_word,
-            voicevox_user_dict_to_json,
-            voicevox_user_dict_import,
-            voicevox_user_dict_load,
-            voicevox_user_dict_save,
-            voicevox_user_dict_delete,
-            voicevox_json_free,
-            ..
-        } = Symbols::new(lib)?;
+    unsafe fn exec(&self, lib: Library) -> anyhow::Result<()> {
+        let lib = CApi::from_library(lib)?;
 
         let get_json = |dict: &*mut VoicevoxUserDict| -> String {
             let mut json = MaybeUninit::uninit();
-            assert_ok(voicevox_user_dict_to_json(
-                (*dict) as *const _,
-                json.as_mut_ptr(),
-            ));
+            assert_ok(lib.voicevox_user_dict_to_json((*dict) as *const _, json.as_mut_ptr()));
 
             let ret = CStr::from_ptr(json.assume_init())
                 .to_str()
                 .unwrap()
                 .to_string();
 
-            voicevox_json_free(json.assume_init());
+            lib.voicevox_json_free(json.assume_init());
 
             serde_json::from_str::<serde_json::Value>(&ret).expect("invalid json");
 
@@ -64,20 +48,16 @@ impl assert_cdylib::TestCase for TestCase {
         let add_word = |dict: *const VoicevoxUserDict, word: &VoicevoxUserDictWord| -> Uuid {
             let mut word_uuid = [0u8; 16];
 
-            assert_ok(voicevox_user_dict_add_word(
-                dict,
-                word as *const _,
-                &mut word_uuid,
-            ));
+            assert_ok(lib.voicevox_user_dict_add_word(dict, word as *const _, &mut word_uuid));
 
             Uuid::from_slice(&word_uuid).expect("invalid uuid")
         };
 
         // テスト用の辞書ファイルを作成
-        let dict = voicevox_user_dict_new();
+        let dict = lib.voicevox_user_dict_new();
 
         // 単語の追加のテスト
-        let word = voicevox_user_dict_word_make(cstr!("hoge").as_ptr(), cstr!("ホゲ").as_ptr());
+        let word = lib.voicevox_user_dict_word_make(cstr!("hoge").as_ptr(), cstr!("ホゲ").as_ptr());
 
         let word_uuid = add_word(dict, &word);
 
@@ -88,13 +68,9 @@ impl assert_cdylib::TestCase for TestCase {
         assert_contains_uuid(&json, &word_uuid);
 
         // 単語の変更のテスト
-        let word = voicevox_user_dict_word_make(cstr!("fuga").as_ptr(), cstr!("フガ").as_ptr());
+        let word = lib.voicevox_user_dict_word_make(cstr!("fuga").as_ptr(), cstr!("フガ").as_ptr());
 
-        assert_ok(voicevox_user_dict_update_word(
-            dict,
-            &word_uuid.into_bytes(),
-            &word,
-        ));
+        assert_ok(lib.voicevox_user_dict_update_word(dict, &word_uuid.into_bytes(), &word));
 
         let json = get_json(&dict);
 
@@ -105,14 +81,14 @@ impl assert_cdylib::TestCase for TestCase {
         assert_contains_uuid(&json, &word_uuid);
 
         // 辞書のインポートのテスト。
-        let other_dict = voicevox_user_dict_new();
+        let other_dict = lib.voicevox_user_dict_new();
 
         let other_word =
-            voicevox_user_dict_word_make(cstr!("piyo").as_ptr(), cstr!("ピヨ").as_ptr());
+            lib.voicevox_user_dict_word_make(cstr!("piyo").as_ptr(), cstr!("ピヨ").as_ptr());
 
         let other_word_uuid = add_word(other_dict, &other_word);
 
-        assert_ok(voicevox_user_dict_import(dict, other_dict));
+        assert_ok(lib.voicevox_user_dict_import(dict, other_dict));
 
         let json = get_json(&dict);
         assert!(json.contains("ｆｕｇａ"));
@@ -123,10 +99,7 @@ impl assert_cdylib::TestCase for TestCase {
         assert_contains_uuid(&json, &other_word_uuid);
 
         // 単語の削除のテスト
-        assert_ok(voicevox_user_dict_remove_word(
-            dict,
-            &word_uuid.into_bytes(),
-        ));
+        assert_ok(lib.voicevox_user_dict_remove_word(dict, &word_uuid.into_bytes()));
 
         let json = get_json(&dict);
         assert_not_contains_uuid(&json, &word_uuid);
@@ -136,23 +109,23 @@ impl assert_cdylib::TestCase for TestCase {
         // 辞書のセーブ・ロードのテスト
         let temp_path = NamedTempFile::new().unwrap().into_temp_path();
         let temp_path = CString::new(temp_path.to_str().unwrap()).unwrap();
-        let word = voicevox_user_dict_word_make(cstr!("hoge").as_ptr(), cstr!("ホゲ").as_ptr());
+        let word = lib.voicevox_user_dict_word_make(cstr!("hoge").as_ptr(), cstr!("ホゲ").as_ptr());
         let word_uuid = add_word(dict, &word);
 
-        assert_ok(voicevox_user_dict_save(dict, temp_path.as_ptr()));
-        assert_ok(voicevox_user_dict_load(other_dict, temp_path.as_ptr()));
+        assert_ok(lib.voicevox_user_dict_save(dict, temp_path.as_ptr()));
+        assert_ok(lib.voicevox_user_dict_load(other_dict, temp_path.as_ptr()));
 
         let json = get_json(&other_dict);
         assert_contains_uuid(&json, &word_uuid);
         assert_contains_uuid(&json, &other_word_uuid);
 
-        voicevox_user_dict_delete(dict);
-        voicevox_user_dict_delete(other_dict);
+        lib.voicevox_user_dict_delete(dict);
+        lib.voicevox_user_dict_delete(other_dict);
 
         return Ok(());
 
         fn assert_ok(result_code: VoicevoxResultCode) {
-            std::assert_eq!(VoicevoxResultCode::VOICEVOX_RESULT_OK, result_code);
+            std::assert_eq!(c_api::VoicevoxResultCode_VOICEVOX_RESULT_OK, result_code);
         }
 
         fn assert_contains_uuid(text: &str, pattern: &Uuid) {
diff --git a/crates/voicevox_core_java_api/lib/src/main/java/jp/hiroshiba/voicevoxcore/VoiceModel.java b/crates/voicevox_core_java_api/lib/src/main/java/jp/hiroshiba/voicevoxcore/VoiceModel.java
index ba4881566..576629515 100644
--- a/crates/voicevox_core_java_api/lib/src/main/java/jp/hiroshiba/voicevoxcore/VoiceModel.java
+++ b/crates/voicevox_core_java_api/lib/src/main/java/jp/hiroshiba/voicevoxcore/VoiceModel.java
@@ -103,6 +103,12 @@ public static class StyleMeta {
     @Expose
     public final int id;
 
+    /** スタイルに対応するモデルの種類。 */
+    @SerializedName("type")
+    @Expose
+    @Nonnull
+    public final StyleType type;
+
     /**
      * 話者の順番。
      *
@@ -116,7 +122,16 @@ public static class StyleMeta {
     private StyleMeta() {
       this.name = "";
       this.id = 0;
+      this.type = StyleType.TALK;
       this.order = null;
     }
   }
+
+  /** スタイル（style）に対応するモデルの種類。 */
+  public static enum StyleType {
+    /** 音声合成クエリの作成と音声合成が可能。 */
+    @SerializedName("talk")
+    @Expose
+    TALK,
+  }
 }
diff --git a/crates/voicevox_core_java_api/lib/src/main/java/jp/hiroshiba/voicevoxcore/exceptions/InvalidModelFormatException.java b/crates/voicevox_core_java_api/lib/src/main/java/jp/hiroshiba/voicevoxcore/exceptions/InvalidModelFormatException.java
new file mode 100644
index 000000000..b82016164
--- /dev/null
+++ b/crates/voicevox_core_java_api/lib/src/main/java/jp/hiroshiba/voicevoxcore/exceptions/InvalidModelFormatException.java
@@ -0,0 +1,14 @@
+package jp.hiroshiba.voicevoxcore.exceptions;
+
+import java.io.IOException;
+
+/** モデルの形式が不正。 */
+public class InvalidModelFormatException extends IOException {
+  public InvalidModelFormatException(String message) {
+    super(message);
+  }
+
+  public InvalidModelFormatException(String message, Throwable cause) {
+    super(message, cause);
+  }
+}
diff --git a/crates/voicevox_core_java_api/lib/src/test/java/jp/hiroshiba/voicevoxcore/MetaTest.java b/crates/voicevox_core_java_api/lib/src/test/java/jp/hiroshiba/voicevoxcore/MetaTest.java
index 741f84e79..60df7359f 100644
--- a/crates/voicevox_core_java_api/lib/src/test/java/jp/hiroshiba/voicevoxcore/MetaTest.java
+++ b/crates/voicevox_core_java_api/lib/src/test/java/jp/hiroshiba/voicevoxcore/MetaTest.java
@@ -13,7 +13,7 @@ class MetaTest {
   void checkLoad() {
     // cwdはvoicevox_core/crates/voicevox_core_java_api/lib
     String cwd = System.getProperty("user.dir");
-    File path = new File(cwd + "/../../../model/sample.vvm");
+    File path = new File(cwd + "/../../test_util/data/model/sample.vvm");
     VoiceModel model = new VoiceModel(path.getAbsolutePath());
     assertNotNull(model.metas);
   }
diff --git a/crates/voicevox_core_java_api/lib/src/test/java/jp/hiroshiba/voicevoxcore/TestUtils.java b/crates/voicevox_core_java_api/lib/src/test/java/jp/hiroshiba/voicevoxcore/TestUtils.java
index 670eddbdb..032c38a3d 100644
--- a/crates/voicevox_core_java_api/lib/src/test/java/jp/hiroshiba/voicevoxcore/TestUtils.java
+++ b/crates/voicevox_core_java_api/lib/src/test/java/jp/hiroshiba/voicevoxcore/TestUtils.java
@@ -6,7 +6,7 @@ class TestUtils {
   VoiceModel loadModel() {
     // cwdはvoicevox_core/crates/voicevox_core_java_api/lib
     String cwd = System.getProperty("user.dir");
-    File path = new File(cwd + "/../../../model/sample.vvm");
+    File path = new File(cwd + "/../../test_util/data/model/sample.vvm");
 
     try {
       return new VoiceModel(path.getCanonicalPath());
diff --git a/crates/voicevox_core_java_api/src/common.rs b/crates/voicevox_core_java_api/src/common.rs
index 71a60f5f3..bdb37f4ff 100644
--- a/crates/voicevox_core_java_api/src/common.rs
+++ b/crates/voicevox_core_java_api/src/common.rs
@@ -69,6 +69,7 @@ where
                             GpuSupport,
                             OpenZipFile,
                             ReadZipEntry,
+                            InvalidModelFormat,
                             ModelAlreadyLoaded,
                             StyleAlreadyLoaded,
                             InvalidModelData,
diff --git a/crates/voicevox_core_macros/src/lib.rs b/crates/voicevox_core_macros/src/lib.rs
index 5f2f26809..98a2fdc5c 100644
--- a/crates/voicevox_core_macros/src/lib.rs
+++ b/crates/voicevox_core_macros/src/lib.rs
@@ -17,17 +17,18 @@ use syn::parse_macro_input;
 /// use enum_map::Enum;
 /// use macros::InferenceOperation;
 ///
-/// pub(crate) enum InferenceDomainImpl {}
+/// pub(crate) enum TalkDomain {}
 ///
-/// impl InferenceDomain for InferenceDomainImpl {
-///     type Operation = InferenceOperationImpl;
+/// impl InferenceDomain for TalkDomain {
+///     type Operation = TalkOperation;
+///     // ...
 /// }
 ///
 /// #[derive(Clone, Copy, Enum, InferenceOperation)]
 /// #[inference_operation(
-///     type Domain = InferenceDomainImpl;
+///     type Domain = TalkDomain;
 /// )]
-/// pub(crate) enum InferenceOperationImpl {
+/// pub(crate) enum TalkOperation {
 ///     #[inference_operation(
 ///         type Input = PredictDurationInput;
 ///         type Output = PredictDurationOutput;
diff --git a/crates/voicevox_core_python_api/python/test/conftest.py b/crates/voicevox_core_python_api/python/test/conftest.py
index 628f4dc56..eec642cb9 100644
--- a/crates/voicevox_core_python_api/python/test/conftest.py
+++ b/crates/voicevox_core_python_api/python/test/conftest.py
@@ -10,7 +10,9 @@
 open_jtalk_dic_dir = (
     root_dir.parent.parent.parent / "test_util" / "data" / "open_jtalk_dic_utf_8-1.11"
 )
-model_dir = root_dir.parent.parent.parent.parent / "model" / "sample.vvm"
+model_dir = (
+    root_dir.parent.parent.parent / "test_util" / "data" / "model" / "sample.vvm"
+)
 
 
 class DurationExampleData(TypedDict):
diff --git a/crates/voicevox_core_python_api/python/test/test_asyncio_metas.py b/crates/voicevox_core_python_api/python/test/test_asyncio_metas.py
new file mode 100644
index 000000000..ec69032b1
--- /dev/null
+++ b/crates/voicevox_core_python_api/python/test/test_asyncio_metas.py
@@ -0,0 +1,26 @@
+"""
+メタ情報の出力が可能かどうかをテストする。
+
+``test_blocking_metas`` と対になる。
+"""
+
+import conftest
+import pytest
+import pytest_asyncio
+from voicevox_core.asyncio import OpenJtalk, Synthesizer, VoiceModel
+
+
+def test_voice_model_metas_works(voice_model: VoiceModel) -> None:
+    _ = voice_model.metas
+
+
+@pytest.mark.asyncio
+async def test_synthesizer_metas_works(voice_model: VoiceModel) -> None:
+    synthesizer = Synthesizer(await OpenJtalk.new(conftest.open_jtalk_dic_dir))
+    await synthesizer.load_voice_model(voice_model)
+    _ = synthesizer.metas
+
+
+@pytest_asyncio.fixture
+async def voice_model() -> VoiceModel:
+    return await VoiceModel.from_path(conftest.model_dir)
diff --git a/crates/voicevox_core_python_api/python/test/test_blocking_metas.py b/crates/voicevox_core_python_api/python/test/test_blocking_metas.py
new file mode 100644
index 000000000..c305e2cdb
--- /dev/null
+++ b/crates/voicevox_core_python_api/python/test/test_blocking_metas.py
@@ -0,0 +1,24 @@
+"""
+メタ情報の出力が可能かどうかをテストする。
+
+``test_asyncio_metas`` と対になる。
+"""
+
+import conftest
+import pytest
+from voicevox_core.blocking import OpenJtalk, Synthesizer, VoiceModel
+
+
+def test_voice_model_metas_works(voice_model: VoiceModel) -> None:
+    _ = voice_model.metas
+
+
+def test_synthesizer_metas_works(voice_model: VoiceModel) -> None:
+    synthesizer = Synthesizer(OpenJtalk(conftest.open_jtalk_dic_dir))
+    synthesizer.load_voice_model(voice_model)
+    _ = synthesizer.metas
+
+
+@pytest.fixture
+def voice_model() -> VoiceModel:
+    return VoiceModel.from_path(conftest.model_dir)
diff --git a/crates/voicevox_core_python_api/python/voicevox_core/_models.py b/crates/voicevox_core_python_api/python/voicevox_core/_models.py
index c72bbcbf0..21a2016fe 100644
--- a/crates/voicevox_core_python_api/python/voicevox_core/_models.py
+++ b/crates/voicevox_core_python_api/python/voicevox_core/_models.py
@@ -34,6 +34,13 @@
 """
 
 
+class StyleType(str, Enum):
+    """**スタイル** (_style_)に対応するモデルの種類。"""
+
+    TALK = "talk"
+    """音声合成クエリの作成と音声合成が可能。"""
+
+
 @pydantic.dataclasses.dataclass
 class StyleMeta:
     """**スタイル** (_style_)のメタ情報。"""
@@ -44,6 +51,9 @@ class StyleMeta:
     id: StyleId
     """スタイルID。"""
 
+    type: StyleType = dataclasses.field(default=StyleType.TALK)
+    """スタイルに対応するモデルの種類。"""
+
     order: Optional[int] = None
     """
     話者の順番。
diff --git a/crates/voicevox_core_python_api/python/voicevox_core/_rust/__init__.pyi b/crates/voicevox_core_python_api/python/voicevox_core/_rust/__init__.pyi
index 3a47ef02b..89a50d230 100644
--- a/crates/voicevox_core_python_api/python/voicevox_core/_rust/__init__.pyi
+++ b/crates/voicevox_core_python_api/python/voicevox_core/_rust/__init__.pyi
@@ -37,6 +37,11 @@ class ReadZipEntryError(Exception):
 
     ...
 
+class InvalidModelFormatError(Exception):
+    """モデルの形式が不正。"""
+
+    ...
+
 class ModelAlreadyLoadedError(Exception):
     """すでに読み込まれている音声モデルを読み込もうとした。"""
 
diff --git a/crates/voicevox_core_python_api/src/convert.rs b/crates/voicevox_core_python_api/src/convert.rs
index 3f629f90e..3cee4186b 100644
--- a/crates/voicevox_core_python_api/src/convert.rs
+++ b/crates/voicevox_core_python_api/src/convert.rs
@@ -16,10 +16,10 @@ use voicevox_core::{
 
 use crate::{
     ExtractFullContextLabelError, GetSupportedDevicesError, GpuSupportError, InferenceFailedError,
-    InvalidModelDataError, InvalidWordError, LoadUserDictError, ModelAlreadyLoadedError,
-    ModelNotFoundError, NotLoadedOpenjtalkDictError, OpenZipFileError, ParseKanaError,
-    ReadZipEntryError, SaveUserDictError, StyleAlreadyLoadedError, StyleNotFoundError,
-    UseUserDictError, WordNotFoundError,
+    InvalidModelDataError, InvalidModelFormatError, InvalidWordError, LoadUserDictError,
+    ModelAlreadyLoadedError, ModelNotFoundError, NotLoadedOpenjtalkDictError, OpenZipFileError,
+    ParseKanaError, ReadZipEntryError, SaveUserDictError, StyleAlreadyLoadedError,
+    StyleNotFoundError, UseUserDictError, WordNotFoundError,
 };
 
 pub(crate) fn from_acceleration_mode(ob: &PyAny) -> PyResult<AccelerationMode> {
@@ -194,6 +194,7 @@ pub(crate) impl<T> voicevox_core::Result<T> {
                 ErrorKind::ReadZipEntry => ReadZipEntryError::new_err(msg),
                 ErrorKind::ModelAlreadyLoaded => ModelAlreadyLoadedError::new_err(msg),
                 ErrorKind::StyleAlreadyLoaded => StyleAlreadyLoadedError::new_err(msg),
+                ErrorKind::InvalidModelFormat => InvalidModelFormatError::new_err(msg),
                 ErrorKind::InvalidModelData => InvalidModelDataError::new_err(msg),
                 ErrorKind::GetSupportedDevices => GetSupportedDevicesError::new_err(msg),
                 ErrorKind::StyleNotFound => StyleNotFoundError::new_err(msg),
diff --git a/crates/voicevox_core_python_api/src/lib.rs b/crates/voicevox_core_python_api/src/lib.rs
index 4d190333d..492d18f0e 100644
--- a/crates/voicevox_core_python_api/src/lib.rs
+++ b/crates/voicevox_core_python_api/src/lib.rs
@@ -71,6 +71,7 @@ exceptions! {
     ReadZipEntryError: PyException;
     ModelAlreadyLoadedError: PyException;
     StyleAlreadyLoadedError: PyException;
+    InvalidModelFormatError: PyException;
     InvalidModelDataError: PyException;
     GetSupportedDevicesError: PyException;
     StyleNotFoundError: PyKeyError;
diff --git a/docs/vvm.md b/docs/vvm.md
index c2de7fb41..cc7b9232e 100644
--- a/docs/vvm.md
+++ b/docs/vvm.md
@@ -14,7 +14,7 @@
 
 model は `.onnx` や `.bin` など様々ある。例えば `sample.vvm` は `predict_duration.onnx` / `predict_intonation.onnx` / `decode.onnx` を含む。  
 
-VOICEVOX OSS が提供する VVM には [`sample.vvm`](https://github.com/VOICEVOX/voicevox_core/tree/main/model) がある。  
+VOICEVOX OSS が提供する VVM には `sample.vvm` がある（ビルドを行うと `crates/test_util/data/model/sample.vvm` が生成される）。  
 製品版 VOICEVOX で利用される VVM は [こちらのレポジトリ](https://github.com/VOICEVOX/voicevox_fat_resource/tree/main/core/model) で確認できる。  
 
 ## マニフェストファイル
diff --git a/example/kotlin/README.md b/example/kotlin/README.md
index 908bdd51f..3bcdafc94 100644
--- a/example/kotlin/README.md
+++ b/example/kotlin/README.md
@@ -57,9 +57,9 @@ Options:
 ## 実行例
 
 ```console
-❯ ./gradlew run --args="--vvm ../../model/sample.vvm"
+❯ ./gradlew run --args="--vvm ../../crates/test_util/data/model/sample.vvm"
 Inititalizing: AUTO, ./open_jtalk_dic_utf_8-1.11
-Loading: ../../model/sample.vvm
+Loading: ../../crates/test_util/data/model/sample.vvm
 Creating an AudioQuery from the text: この音声は、ボイスボックスを使用して、出力されています。
 Synthesizing...
 Saving the audio to ./output.wav
diff --git a/example/python/README.md b/example/python/README.md
index 392896030..97303eb81 100644
--- a/example/python/README.md
+++ b/example/python/README.md
@@ -69,12 +69,12 @@ optional arguments:
 ## 実行例
 
 ```console
-❯ python ./run.py ../../model/sample.vvm
+❯ python ./run.py ../../crates/test_util/data/model/sample.vvm
 [DEBUG] __main__: voicevox_core.supported_devices()=SupportedDevices(cpu=True, cuda=False, dml=False)
 [INFO] __main__: Initializing (acceleration_mode=<AccelerationMode.AUTO: 'AUTO'>, open_jtalk_dict_dir=PosixPath('open_jtalk_dic_utf_8-1.11'))
 [DEBUG] __main__: synthesizer.metas=[]
 [DEBUG] __main__: synthesizer.is_gpu_mode=False
-[INFO] __main__: Loading `../../model/sample.vvm`
+[INFO] __main__: Loading `../../crates/test_util/data/model/sample.vvm`
 [INFO] __main__: Creating an AudioQuery from 'この音声は、ボイスボックスを使用して、出力されています。'
 [INFO] __main__: Synthesizing with {"accent_phrases": [{"moras": [{"text": "コ", "consonant": "k", "consonant_length": 0.0556899, "vowel": "o", "vowel_length": 0.075180575, "pitch": 5.542309}, {"text": "ノ", "consonant": "n", "consonant_length": 0.06551014, "vowel": "o", "vowel_length": 0.09984577, "pitch": 5.6173983}], "accent": 2, "pause_mora": null, "is_interrogative": false}, {"moras": [{"text": "オ", "consonant": null, "consonant_length": null, "vowel": "o", "vowel_length": 0.116150305, "pitch": 5.7063766}, {"text": "ン", "consonant": null, "consonant_length": null, "vowel": "N", "vowel_length": 0.044380233, "pitch": 5.785717}, {"text": "セ", "consonant": "s", "consonant_length": 0.07719758, "vowel": "e", "vowel_length": 0.08653869, "pitch": 5.662092}, {"text": "エ", "consonant": null, "consonant_length": null, "vowel": "e", "vowel_length": 0.08311573, "pitch": 5.532917}, {"text": "ワ", "consonant": "w", "consonant_length": 0.06373148, "vowel": "a", "vowel_length": 0.16219379, "pitch": 5.293258}], "accent": 1, "pause_mora": {"text": "、", "consonant": null, "consonant_length": null, "vowel": "pau", "vowel_length": 0.35826492, "pitch": 0.0}, "is_interrogative": false}, {"moras": [{"text": "ボ", "consonant": "b", "consonant_length": 0.047082342, "vowel": "o", "vowel_length": 0.12611786, "pitch": 5.583892}, {"text": "イ", "consonant": null, "consonant_length": null, "vowel": "i", "vowel_length": 0.059451744, "pitch": 5.7947493}, {"text": "ス", "consonant": "s", "consonant_length": 0.089278996, "vowel": "u", "vowel_length": 0.11847979, "pitch": 5.818695}, {"text": "ボ", "consonant": "b", "consonant_length": 0.06535433, "vowel": "o", "vowel_length": 0.120458946, "pitch": 5.7965107}, {"text": "ッ", "consonant": null, "consonant_length": null, "vowel": "cl", "vowel_length": 0.06940381, "pitch": 0.0}, {"text": "ク", "consonant": "k", "consonant_length": 0.053739145, "vowel": "U", "vowel_length": 0.05395376, "pitch": 0.0}, {"text": "ス", "consonant": "s", "consonant_length": 0.10222931, "vowel": "u", "vowel_length": 0.071811065, "pitch": 5.8024883}, {"text": "オ", "consonant": null, "consonant_length": null, "vowel": "o", "vowel_length": 0.11092262, "pitch": 5.5036163}], "accent": 4, "pause_mora": null, "is_interrogative": false}, {"moras": [{"text": "シ", "consonant": "sh", "consonant_length": 0.09327768, "vowel": "i", "vowel_length": 0.09126951, "pitch": 5.369444}, {"text": "ヨ", "consonant": "y", "consonant_length": 0.06251812, "vowel": "o", "vowel_length": 0.07805054, "pitch": 5.5021667}, {"text": "オ", "consonant": null, "consonant_length": null, "vowel": "o", "vowel_length": 0.09904325, "pitch": 5.5219536}], "accent": 3, "pause_mora": null, "is_interrogative": false}, {"moras": [{"text": "シ", "consonant": "sh", "consonant_length": 0.04879771, "vowel": "I", "vowel_length": 0.06514315, "pitch": 0.0}, {"text": "テ", "consonant": "t", "consonant_length": 0.0840496, "vowel": "e", "vowel_length": 0.19438823, "pitch": 5.4875555}], "accent": 2, "pause_mora": {"text": "、", "consonant": null, "consonant_length": null, "vowel": "pau", "vowel_length": 0.35208154, "pitch": 0.0}, "is_interrogative": false}, {"moras": [{"text": "シュ", "consonant": "sh", "consonant_length": 0.05436731, "vowel": "U", "vowel_length": 0.06044446, "pitch": 0.0}, {"text": "ツ", "consonant": "ts", "consonant_length": 0.102865085, "vowel": "u", "vowel_length": 0.057028636, "pitch": 5.6402535}, {"text": "リョ", "consonant": "ry", "consonant_length": 0.058293864, "vowel": "o", "vowel_length": 0.080050275, "pitch": 5.6997967}, {"text": "ク", "consonant": "k", "consonant_length": 0.054767884, "vowel": "U", "vowel_length": 0.042932786, "pitch": 0.0}], "accent": 2, "pause_mora": null, "is_interrogative": false}, {"moras": [{"text": "サ", "consonant": "s", "consonant_length": 0.08067487, "vowel": "a", "vowel_length": 0.07377973, "pitch": 5.652378}, {"text": "レ", "consonant": "r", "consonant_length": 0.040600352, "vowel": "e", "vowel_length": 0.079322875, "pitch": 5.6290326}, {"text": "テ", "consonant": "t", "consonant_length": 0.06773268, "vowel": "e", "vowel_length": 0.08347456, "pitch": 5.6427326}], "accent": 3, "pause_mora": null, "is_interrogative": false}, {"moras": [{"text": "イ", "consonant": null, "consonant_length": null, "vowel": "i", "vowel_length": 0.07542324, "pitch": 5.641289}, {"text": "マ", "consonant": "m", "consonant_length": 0.066299975, "vowel": "a", "vowel_length": 0.107257664, "pitch": 5.6201453}, {"text": "ス", "consonant": "s", "consonant_length": 0.07186453, "vowel": "U", "vowel_length": 0.1163103, "pitch": 0.0}], "accent": 2, "pause_mora": null, "is_interrogative": false}], "speed_scale": 1.0, "pitch_scale": 0.0, "intonation_scale": 1.0, "volume_scale": 1.0, "pre_phoneme_length": 0.1, "post_phoneme_length": 0.1, "output_sampling_rate": 24000, "output_stereo": false, "kana": "コノ'/オ'ンセエワ、ボイスボ'ッ_クスオ/シヨオ'/_シテ'、_シュツ' リョ_ク/サレテ'/イマ'_ス"}
 [INFO] __main__: Wrote `output.wav`
diff --git a/model/sample.vvm b/model/sample.vvm
deleted file mode 100644
index 48d23745d..000000000
Binary files a/model/sample.vvm and /dev/null differ
diff --git a/crates/voicevox_core/src/test_data/model_sources/load_model_works1/decode.onnx b/model/sample.vvm/decode.onnx
similarity index 100%
rename from crates/voicevox_core/src/test_data/model_sources/load_model_works1/decode.onnx
rename to model/sample.vvm/decode.onnx
diff --git a/model/sample.vvm/manifest.json b/model/sample.vvm/manifest.json
new file mode 100644
index 000000000..2c6721d08
--- /dev/null
+++ b/model/sample.vvm/manifest.json
@@ -0,0 +1,13 @@
+{
+  "manifest_version": "0.0.0",
+  "metas_filename": "metas.json",
+  "talk": {
+    "predict_duration_filename": "predict_duration.onnx",
+    "predict_intonation_filename": "predict_intonation.onnx",
+    "decode_filename": "decode.onnx",
+    "style_id_to_model_inner_id": {
+      "302": 2,
+      "303": 3
+    }
+  }
+}
diff --git a/crates/voicevox_core/src/test_data/model_sources/load_model_works1/metas.json b/model/sample.vvm/metas.json
similarity index 100%
rename from crates/voicevox_core/src/test_data/model_sources/load_model_works1/metas.json
rename to model/sample.vvm/metas.json
diff --git a/crates/voicevox_core/src/test_data/model_sources/load_model_works1/predict_duration.onnx b/model/sample.vvm/predict_duration.onnx
similarity index 100%
rename from crates/voicevox_core/src/test_data/model_sources/load_model_works1/predict_duration.onnx
rename to model/sample.vvm/predict_duration.onnx
diff --git a/crates/voicevox_core/src/test_data/model_sources/load_model_works1/predict_intonation.onnx b/model/sample.vvm/predict_intonation.onnx
similarity index 100%
rename from crates/voicevox_core/src/test_data/model_sources/load_model_works1/predict_intonation.onnx
rename to model/sample.vvm/predict_intonation.onnx
diff --git a/renovate.json b/renovate.json
index 3e6f4eae4..5704cd5f4 100644
--- a/renovate.json
+++ b/renovate.json
@@ -8,12 +8,12 @@
     {
       "groupSlug": "rust",
       "groupName": "Rust",
-      "matchPackagePatterns": "^Rust$"
+      "matchDepPatterns": "^Rust$"
     },
     {
       "groupSlug": "others",
       "groupName": "Others",
-      "excludePackagePatterns": "^Rust$",
+      "excludeDepPatterns": "^Rust$",
       "dependencyDashboardApproval": true
     }
   ],
diff --git a/rust-toolchain b/rust-toolchain
index 369f9966f..54227249d 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-1.77.2
+1.78.0