diff --git a/src/components/App.vue b/src/components/App.vue
index b4798dead7..e1cc5c9a42 100644
--- a/src/components/App.vue
+++ b/src/components/App.vue
@@ -72,13 +72,13 @@ watchEffect(() => {
 });
 
 // エディタの切り替えを監視してショートカットキーの設定を変更する
-watch(
-  () => store.state.openedEditor,
-  async (openedEditor) => {
-    if (openedEditor != undefined) {
-      hotkeyManager.onEditorChange(openedEditor);
+watchEffect(
+  () => {
+    if (openedEditor.value) {
+      hotkeyManager.onEditorChange(openedEditor.value);
     }
   },
+  { flush: "post" },
 );
 
 // テーマの変更を監視してCSS変数を変更する
@@ -110,9 +110,6 @@ onMounted(async () => {
   // プロジェクトファイルのパスを取得
   const projectFilePath = urlParams.get("projectFilePath");
 
-  // どちらのエディタを開くか設定
-  await store.actions.SET_OPENED_EDITOR({ editor: "talk" });
-
   // ショートカットキーの設定を登録
   const hotkeySettings = store.state.hotkeySettings;
   hotkeyManager.load(structuredClone(toRaw(hotkeySettings)));
diff --git a/src/components/Menu/MenuBar/TitleBarEditorSwitcher.vue b/src/components/Menu/MenuBar/TitleBarEditorSwitcher.vue
index 6410cdae55..14e217e25f 100644
--- a/src/components/Menu/MenuBar/TitleBarEditorSwitcher.vue
+++ b/src/components/Menu/MenuBar/TitleBarEditorSwitcher.vue
@@ -30,7 +30,10 @@ const openedEditor = computed(() => store.state.openedEditor);
 const uiLocked = computed(() => store.getters.UI_LOCKED);
 
 const switchEditor = async (editor: EditorType) => {
-  await store.actions.SET_OPENED_EDITOR({ editor });
+  await store.dispatch("SET_ROOT_MISC_SETTING", {
+    key: "openedEditor",
+    value: editor,
+  });
 };
 </script>
 
diff --git a/src/store/setting.ts b/src/store/setting.ts
index 7567a96eb7..ba9c53548d 100644
--- a/src/store/setting.ts
+++ b/src/store/setting.ts
@@ -18,6 +18,7 @@ import {
 import { IsEqual } from "@/type/utility";
 
 export const settingStoreState: SettingStoreState = {
+  openedEditor: undefined,
   savingSetting: {
     fileEncoding: "UTF-8",
     fileNamePattern: "",
@@ -148,6 +149,7 @@ export const settingStore = createPartialStore<SettingStoreTypes>({
         "undoableTrackOperations",
         "showSingCharacterPortrait",
         "playheadPositionDisplayFormat",
+        "openedEditor",
       ] as const;
 
       // rootMiscSettingKeysに値を足し忘れていたときに型エラーを出す検出用コード
diff --git a/src/store/type.ts b/src/store/type.ts
index eebfd77fcc..fae93613da 100644
--- a/src/store/type.ts
+++ b/src/store/type.ts
@@ -1825,7 +1825,9 @@ export type SettingStoreState = {
   experimentalSetting: ExperimentalSettingType;
   confirmedTips: ConfirmedTips;
   engineSettings: EngineSettings;
-} & RootMiscSettingType;
+} & Omit<RootMiscSettingType, "openedEditor"> & {
+    openedEditor: EditorType | undefined; // undefinedのときはどのエディタを開くか定まっていない
+  };
 
 // keyとvalueの型を連動するようにしたPayloadを作る
 type KeyValuePayload<R, K extends keyof R = keyof R> = K extends keyof R
@@ -1921,7 +1923,6 @@ export type SettingStoreTypes = {
  */
 
 export type UiStoreState = {
-  openedEditor: EditorType | undefined; // undefinedのときはどのエディタを開くか定まっていない
   uiLockCount: number;
   dialogLockCount: number;
   reloadingLock: boolean;
@@ -1951,11 +1952,6 @@ export type DialogStates = {
 };
 
 export type UiStoreTypes = {
-  SET_OPENED_EDITOR: {
-    mutation: { editor: EditorType };
-    action(palyoad: { editor: EditorType }): void;
-  };
-
   UI_LOCKED: {
     getter: boolean;
   };
diff --git a/src/store/ui.ts b/src/store/ui.ts
index 8eebacd042..aec24a5b47 100644
--- a/src/store/ui.ts
+++ b/src/store/ui.ts
@@ -63,7 +63,6 @@ export function withProgress<T>(
 }
 
 export const uiStoreState: UiStoreState = {
-  openedEditor: undefined,
   uiLockCount: 0,
   dialogLockCount: 0,
   reloadingLock: false,
@@ -90,15 +89,6 @@ export const uiStoreState: UiStoreState = {
 };
 
 export const uiStore = createPartialStore<UiStoreTypes>({
-  SET_OPENED_EDITOR: {
-    mutation(state, { editor }) {
-      state.openedEditor = editor;
-    },
-    action({ mutations }, { editor }) {
-      mutations.SET_OPENED_EDITOR({ editor });
-    },
-  },
-
   UI_LOCKED: {
     getter(state) {
       return state.uiLockCount > 0;
diff --git a/src/type/preload.ts b/src/type/preload.ts
index 756d8ac379..d576228a51 100644
--- a/src/type/preload.ts
+++ b/src/type/preload.ts
@@ -545,6 +545,7 @@ export type ConfirmedTips = {
 
 // ルート直下にある雑多な設定値
 export const rootMiscSettingSchema = z.object({
+  openedEditor: z.enum(["talk", "song"]).default("talk"),
   editorFont: z.enum(["default", "os"]).default("default"),
   showTextLineNumber: z.boolean().default(false),
   showAddAudioItemButton: z.boolean().default(true),