diff --git a/Assets/VRM10/Runtime/Components/Vrm10Runtime/ControlRig/Vrm10ControlBone.cs b/Assets/VRM10/Runtime/Components/Vrm10Runtime/ControlRig/Vrm10ControlBone.cs
index f2471e9d4..3a697bf35 100644
--- a/Assets/VRM10/Runtime/Components/Vrm10Runtime/ControlRig/Vrm10ControlBone.cs
+++ b/Assets/VRM10/Runtime/Components/Vrm10Runtime/ControlRig/Vrm10ControlBone.cs
@@ -92,8 +92,7 @@ namespace UniVRM10
         {
             get
             {
-                var delta = Quaternion.Inverse(_initialControlBoneGlobalRotation) * ControlBone.localRotation * _initialControlBoneGlobalRotation;
-                return InitialControlBoneLocalRotation * delta;
+                return _initialControlBoneGlobalRotation * Quaternion.Inverse(InitialControlBoneLocalRotation) * ControlBone.localRotation * Quaternion.Inverse(_initialControlBoneGlobalRotation);
             }
         }