diff --git a/cirq-core/cirq/json_resolver_cache.py b/cirq-core/cirq/json_resolver_cache.py
index 0f866e39e54..f391431e584 100644
--- a/cirq-core/cirq/json_resolver_cache.py
+++ b/cirq-core/cirq/json_resolver_cache.py
@@ -281,4 +281,5 @@ def _symmetricalqidpair(qids):
         'sympy.EulerGamma': lambda: sympy.EulerGamma,
         'complex': complex,
         'datetime.datetime': _datetime,
+        '_InverseCompositeGate': cirq.inverse,
     }
diff --git a/cirq-core/cirq/ops/gate_operation_test.py b/cirq-core/cirq/ops/gate_operation_test.py
index 46cf3cae1a5..d911c25261b 100644
--- a/cirq-core/cirq/ops/gate_operation_test.py
+++ b/cirq-core/cirq/ops/gate_operation_test.py
@@ -506,7 +506,6 @@ def all_subclasses(cls):
         cirq.transformers.measurement_transformers._ConfusionChannel,
         cirq.transformers.measurement_transformers._ModAdd,
         cirq.transformers.routing.visualize_routed_circuit._SwapPrintGate,
-        cirq.ops.raw_types._InverseCompositeGate,
         cirq.circuits.qasm_output.QasmTwoQubitGate,
         cirq.ops.MSGate,
         # Interop gates
diff --git a/cirq-core/cirq/ops/raw_types.py b/cirq-core/cirq/ops/raw_types.py
index 168c3cd1765..51555cbeb8a 100644
--- a/cirq-core/cirq/ops/raw_types.py
+++ b/cirq-core/cirq/ops/raw_types.py
@@ -985,6 +985,7 @@ class _InverseCompositeGate(Gate):
 
     def __init__(self, original: Gate) -> None:
         self._original = original
+        self.val = original
 
     def _qid_shape_(self):
         return protocols.qid_shape(self._original)
@@ -1046,6 +1047,9 @@ def __repr__(self) -> str:
     def __str__(self) -> str:
         return f'{self._original!s}†'
 
+    def _json_dict_(self) -> Dict[str, Any]:
+        return protocols.obj_to_dict_helper(self, attribute_names=["val"])
+
 
 def _validate_qid_shape(val: Any, qubits: Sequence['cirq.Qid']) -> None:
     """Helper function to validate qubits for gates and operations.
diff --git a/cirq-core/cirq/protocols/json_test_data/_InverseCompositeGate.json b/cirq-core/cirq/protocols/json_test_data/_InverseCompositeGate.json
new file mode 100644
index 00000000000..65160b3d388
--- /dev/null
+++ b/cirq-core/cirq/protocols/json_test_data/_InverseCompositeGate.json
@@ -0,0 +1,10 @@
+{
+    "cirq_type": "_InverseCompositeGate",
+    "val": {
+        "cirq_type": "QubitPermutationGate",
+        "permutation": [
+        0,
+        1,
+        2
+    ]}
+}
\ No newline at end of file
diff --git a/cirq-core/cirq/protocols/json_test_data/_InverseCompositeGate.repr b/cirq-core/cirq/protocols/json_test_data/_InverseCompositeGate.repr
new file mode 100644
index 00000000000..cc68af6df87
--- /dev/null
+++ b/cirq-core/cirq/protocols/json_test_data/_InverseCompositeGate.repr
@@ -0,0 +1 @@
+(cirq.QubitPermutationGate(permutation=(0, 1, 2))**-1)