diff --git a/Assets/UniGLTF/Editor/MeshUtility/MeshUtilityDialog.cs b/Assets/UniGLTF/Editor/MeshUtility/MeshUtilityDialog.cs
index a2ae3207a..3a35821f2 100644
--- a/Assets/UniGLTF/Editor/MeshUtility/MeshUtilityDialog.cs
+++ b/Assets/UniGLTF/Editor/MeshUtility/MeshUtilityDialog.cs
@@ -199,7 +199,11 @@ namespace UniGLTF.MeshUtility
                     {
                         try
                         {
-                            var (results, created) = MeshUtility.Process(_exportTarget, context.Instance);
+                            // prefab が instantiate されていた場合に
+                            // Mesh統合設定を instantiate に置き換える
+                            var groupCopy = MeshUtility.CopyInstantiate(_exportTarget, context.Instance);
+
+                            var (results, created) = MeshUtility.Process(context.Instance, groupCopy);
 
                             WriteAssets(context.Instance, context.AssetFolder, results);
                         }
@@ -216,7 +220,7 @@ namespace UniGLTF.MeshUtility
                 {
                     using (var context = new UndoContext("MeshUtility", _exportTarget))
                     {
-                        var (results, created) = MeshUtility.Process(_exportTarget, null);
+                        var (results, created) = MeshUtility.Process(_exportTarget, MeshUtility.MeshIntegrationGroups);
 
                         foreach (var go in created)
                         {
diff --git a/Assets/UniGLTF/Runtime/MeshUtility/GltfMeshUtility.cs b/Assets/UniGLTF/Runtime/MeshUtility/GltfMeshUtility.cs
index adad8582c..bffca8e6d 100644
--- a/Assets/UniGLTF/Runtime/MeshUtility/GltfMeshUtility.cs
+++ b/Assets/UniGLTF/Runtime/MeshUtility/GltfMeshUtility.cs
@@ -99,40 +99,6 @@ namespace UniGLTF.MeshUtility
             });
         }
 
-        void RemoveComponent<T>(T c) where T : Component
-        {
-            if (c == null)
-            {
-                return;
-            }
-            var t = c.transform;
-            if (Application.isPlaying)
-            {
-                GameObject.Destroy(c);
-            }
-            else
-            {
-                GameObject.DestroyImmediate(c);
-            }
-
-            if (t.childCount == 0)
-            {
-                var list = t.GetComponents<Component>();
-                // Debug.Log($"{list[0].GetType().Name}");
-                if (list.Length == 1 && list[0] == t)
-                {
-                    if (Application.isPlaying)
-                    {
-                        GameObject.Destroy(t.gameObject);
-                    }
-                    else
-                    {
-                        GameObject.DestroyImmediate(t.gameObject);
-                    }
-                }
-            }
-        }
-
         static GameObject GetOrCreateEmpty(GameObject go, string name)
         {
             foreach (var child in go.transform.GetChildren())
@@ -156,7 +122,7 @@ namespace UniGLTF.MeshUtility
         /// <param name="go">MeshIntegrationGroup を作ったとき root</param>
         /// <param name="instance">go が prefab だった場合に instance されたもの</param>
         /// <returns></returns>
-        protected virtual IEnumerable<MeshIntegrationGroup> CopyInstantiate(GameObject go, GameObject instance)
+        public virtual IEnumerable<MeshIntegrationGroup> CopyInstantiate(GameObject go, GameObject instance)
         {
             if (instance == null)
             {
@@ -174,9 +140,9 @@ namespace UniGLTF.MeshUtility
             }
         }
 
-        public virtual (List<MeshIntegrationResult>, List<GameObject>) Process(GameObject _go, GameObject _instance)
+        public virtual (List<MeshIntegrationResult>, List<GameObject>) Process(
+            GameObject target, IEnumerable<MeshIntegrationGroup> groupCopy)
         {
-            var target = _instance ?? _go;
             if (FreezeBlendShape || FreezeRotation || FreezeScaling)
             {
                 // MeshをBakeする
@@ -188,10 +154,6 @@ namespace UniGLTF.MeshUtility
                 BoneNormalizer.Replace(target, newMesh, FreezeRotation, FreezeScaling);
             }
 
-            // prefab が instantiate されていた場合に
-            // Mesh統合設定を instantiate に置き換える
-            var groupCopy = CopyInstantiate(_go, _instance);
-
             var newList = new List<GameObject>();
 
             var empty = GetOrCreateEmpty(target, "mesh");
@@ -212,24 +174,29 @@ namespace UniGLTF.MeshUtility
             {
                 foreach (var r in result.SourceMeshRenderers)
                 {
-                    RemoveComponent(r);
+                    if (Application.isPlaying)
+                    {
+                        GameObject.Destroy(r.gameObject.GetComponent<MeshFilter>());
+                        GameObject.Destroy(r);
+                    }
+                    else
+                    {
+                        GameObject.DestroyImmediate(r.gameObject.GetComponent<MeshFilter>());
+                        GameObject.DestroyImmediate(r);
+                    }
                 }
                 foreach (var r in result.SourceSkinnedMeshRenderers)
                 {
-                    RemoveComponent(r);
+                    if (Application.isPlaying)
+                    {
+                        GameObject.Destroy(r);
+                    }
+                    else
+                    {
+                        GameObject.DestroyImmediate(r);
+                    }
                 }
             }
-            // foreach (var result in results)
-            // {
-            //     foreach (var renderer in result.SourceMeshRenderers)
-            //     {
-            //         GameObject.DestroyImmediate(renderer);
-            //     }
-            //     foreach (var renderer in result.SourceSkinnedMeshRenderers)
-            //     {
-            //         GameObject.DestroyImmediate(renderer);
-            //     }
-            // }
 
             MeshIntegrationGroups.Clear();
 
diff --git a/Assets/VRM/Runtime/SkinnedMeshUtility/VrmMeshUtility.cs b/Assets/VRM/Runtime/SkinnedMeshUtility/VrmMeshUtility.cs
index 161f0fddd..37a9abdf8 100644
--- a/Assets/VRM/Runtime/SkinnedMeshUtility/VrmMeshUtility.cs
+++ b/Assets/VRM/Runtime/SkinnedMeshUtility/VrmMeshUtility.cs
@@ -10,7 +10,7 @@ namespace VRM
     public class VrmMeshUtility : UniGLTF.MeshUtility.GltfMeshUtility
     {
         bool _generateFirstPerson = false;
-        protected override IEnumerable<UniGLTF.MeshUtility.MeshIntegrationGroup> CopyInstantiate(GameObject go, GameObject instance)
+        public override IEnumerable<UniGLTF.MeshUtility.MeshIntegrationGroup> CopyInstantiate(GameObject go, GameObject instance)
         {
             var copy = new List<UniGLTF.MeshUtility.MeshIntegrationGroup>();
             _generateFirstPerson = false;
@@ -89,9 +89,10 @@ namespace VRM
         /// <summary>
         /// glTF に比べて Humanoid や FirstPerson の処理が追加される
         /// </summary>
-        public override (List<UniGLTF.MeshUtility.MeshIntegrationResult>, List<GameObject>) Process(GameObject go, GameObject instance)
+        public override (List<UniGLTF.MeshUtility.MeshIntegrationResult>, List<GameObject>) Process(
+            GameObject target, IEnumerable<UniGLTF.MeshUtility.MeshIntegrationGroup> copyGroup)
         {
-            _vrmInstance = go.GetComponent<VRMFirstPerson>();
+            _vrmInstance = target.GetComponent<VRMFirstPerson>();
             if (_vrmInstance == null)
             {
                 throw new ArgumentException();
@@ -102,7 +103,7 @@ namespace VRM
                 throw new NotImplementedException();
 
                 // 必用？
-                var animator = go.GetComponent<Animator>();
+                var animator = target.GetComponent<Animator>();
                 var newAvatar = AvatarDescription.RecreateAvatar(animator);
                 animator.avatar = newAvatar;
             }
@@ -110,11 +111,11 @@ namespace VRM
             // TODO: update: spring
             // TODO: update: constraint
             // TODO: update: firstPerson offset
-            var (list, newList) = base.Process(go, instance);
+            var (list, newList) = base.Process(target, copyGroup);
 
             if (FreezeBlendShape || FreezeRotation || FreezeScaling)
             {
-                var animator = go.GetComponent<Animator>();
+                var animator = target.GetComponent<Animator>();
                 var newAvatar = AvatarDescription.RecreateAvatar(animator);
                 animator.avatar = newAvatar;
             }
diff --git a/Assets/VRM10/Runtime/MeshUtility/Vrm10MeshUtility.cs b/Assets/VRM10/Runtime/MeshUtility/Vrm10MeshUtility.cs
index e9caabcef..c106b6c28 100644
--- a/Assets/VRM10/Runtime/MeshUtility/Vrm10MeshUtility.cs
+++ b/Assets/VRM10/Runtime/MeshUtility/Vrm10MeshUtility.cs
@@ -10,7 +10,7 @@ namespace UniVRM10
     public class Vrm10MeshUtility : UniGLTF.MeshUtility.GltfMeshUtility
     {
         bool _generateFirstPerson = false;
-        protected override IEnumerable<UniGLTF.MeshUtility.MeshIntegrationGroup> CopyInstantiate(GameObject go, GameObject instance)
+        public override IEnumerable<UniGLTF.MeshUtility.MeshIntegrationGroup> CopyInstantiate(GameObject go, GameObject instance)
         {
             var copy = new List<UniGLTF.MeshUtility.MeshIntegrationGroup>();
             _generateFirstPerson = false;
@@ -93,9 +93,10 @@ namespace UniVRM10
         /// <summary>
         /// glTF に比べて Humanoid や FirstPerson の処理が追加される
         /// </summary>
-        public override (List<UniGLTF.MeshUtility.MeshIntegrationResult>, List<GameObject>) Process(GameObject go, GameObject instance)
+        public override (List<UniGLTF.MeshUtility.MeshIntegrationResult>, List<GameObject>) Process(
+            GameObject target, IEnumerable<UniGLTF.MeshUtility.MeshIntegrationGroup> groupCopy)
         {
-            _vrmInstance = go.GetComponent<Vrm10Instance>();
+            _vrmInstance = target.GetComponent<Vrm10Instance>();
             if (_vrmInstance == null)
             {
                 throw new ArgumentException();
@@ -106,7 +107,7 @@ namespace UniVRM10
                 throw new NotImplementedException();
 
                 // 必用？
-                var animator = go.GetComponent<Animator>();
+                var animator = target.GetComponent<Animator>();
                 var newAvatar = AvatarDescription.RecreateAvatar(animator);
                 animator.avatar = newAvatar;
             }
@@ -114,11 +115,11 @@ namespace UniVRM10
             // TODO: update: spring
             // TODO: update: constraint
             // TODO: update: firstPerson offset
-            var (list, newList) = base.Process(go, instance);
+            var (list, newList) = base.Process(target, groupCopy);
 
             if (FreezeBlendShape || FreezeRotation || FreezeScaling)
             {
-                var animator = go.GetComponent<Animator>();
+                var animator = target.GetComponent<Animator>();
                 var newAvatar = AvatarDescription.RecreateAvatar(animator);
                 animator.avatar = newAvatar;
             }