diff --git a/Assets/UniGLTF/Editor/MeshUtility/MeshUtilityDialog.cs b/Assets/UniGLTF/Editor/MeshUtility/MeshUtilityDialog.cs
index 343ecafa5..1c10a6eab 100644
--- a/Assets/UniGLTF/Editor/MeshUtility/MeshUtilityDialog.cs
+++ b/Assets/UniGLTF/Editor/MeshUtility/MeshUtilityDialog.cs
@@ -205,9 +205,9 @@ namespace UniGLTF.MeshUtility
 
                             var (results, created) = MeshUtility.Process(context.Instance, groupCopy);
 
-                            WriteAssets(context.Instance, context.AssetFolder, results, _exportTarget);
-
-                            MeshUtility.clear(results);
+                            // TODO: this should be replaced export and reimport ?
+                            WriteAssets(context.AssetFolder, context.Instance, results);
+                            WritePrefab(context.AssetFolder, context.Instance);
                         }
                         catch (Exception ex)
                         {
@@ -223,7 +223,7 @@ namespace UniGLTF.MeshUtility
                     using (var context = new UndoContext("MeshUtility", _exportTarget))
                     {
                         var (results, created) = MeshUtility.Process(_exportTarget, MeshUtility.MeshIntegrationGroups);
-                        MeshUtility.clear(results);
+                        MeshUtility.Clear(results);
 
                         foreach (var go in created)
                         {
@@ -239,11 +239,10 @@ namespace UniGLTF.MeshUtility
         }
 
         /// <summary>
-        /// Write Mesh & Prefab
+        /// Write Mesh
         /// </summary>
-        protected virtual string WriteAssets(GameObject copy, string assetFolder, List<MeshIntegrationResult> results, GameObject prefab)
+        protected virtual void WriteAssets(string assetFolder, GameObject instance, List<MeshIntegrationResult> results)
         {
-            // write mesh asset
             foreach (var result in results)
             {
                 if (result.Integrated != null)
@@ -260,15 +259,21 @@ namespace UniGLTF.MeshUtility
                 }
             }
 
-            // prefab
+            MeshUtility.Clear(results);
+        }
+
+        /// <summary>
+        /// Write Prefab
+        /// </summary>
+        protected virtual string WritePrefab(string assetFolder, GameObject instance)
+        {
             var prefabPath = $"{assetFolder}/Integrated.prefab";
             Debug.Log(prefabPath);
-            PrefabUtility.SaveAsPrefabAsset(copy, prefabPath, out bool success);
+            PrefabUtility.SaveAsPrefabAsset(instance, prefabPath, out bool success);
             if (!success)
             {
-                throw new System.Exception($"PrefabUtility.SaveAsPrefabAsset: {prefabPath}");
+                throw new Exception($"PrefabUtility.SaveAsPrefabAsset: {prefabPath}");
             }
-
             return prefabPath;
         }
 
diff --git a/Assets/UniGLTF/Runtime/MeshUtility/GltfMeshUtility.cs b/Assets/UniGLTF/Runtime/MeshUtility/GltfMeshUtility.cs
index 6366450b3..0ce1cad6e 100644
--- a/Assets/UniGLTF/Runtime/MeshUtility/GltfMeshUtility.cs
+++ b/Assets/UniGLTF/Runtime/MeshUtility/GltfMeshUtility.cs
@@ -166,7 +166,7 @@ namespace UniGLTF.MeshUtility
             return (results, newList);
         }
 
-        public void clear(List<MeshIntegrationResult> results)
+        public void Clear(List<MeshIntegrationResult> results)
         {
             // 用が済んだ 統合前 の renderer を削除する
             foreach (var result in results)
diff --git a/Assets/VRM/Editor/SkinnedMeshUtility/VrmMeshIntegratorWizard.cs b/Assets/VRM/Editor/SkinnedMeshUtility/VrmMeshIntegratorWizard.cs
index 7da4743f9..a059ac207 100644
--- a/Assets/VRM/Editor/SkinnedMeshUtility/VrmMeshIntegratorWizard.cs
+++ b/Assets/VRM/Editor/SkinnedMeshUtility/VrmMeshIntegratorWizard.cs
@@ -50,22 +50,27 @@ namespace VRM
             return firstPerson || mod;
         }
 
-        protected override string WriteAssets(GameObject target, string assetFolder, List<MeshIntegrationResult> results, GameObject prefab)
+        List<BlendShapeClip> _clips;
+        protected override void WriteAssets(string assetFolder, GameObject target, List<MeshIntegrationResult> results)
         {
             // 統合した結果を反映した BlendShapeClip を作成して置き換える
-            var clips = VRMMeshIntegratorUtility.FollowBlendshapeRendererChange(results, target, assetFolder);
-
-            // reset firstperson
-            if (target.GetComponent<VRMFirstPerson>() is VRMFirstPerson firstperson)
-            {
-                firstperson.Reset();
-            }
+            _clips = VRMMeshIntegratorUtility.FollowBlendshapeRendererChange(results, target, assetFolder);
 
             // write mesh & prefab
-            var prefabPath = base.WriteAssets(target, assetFolder, results, prefab);
+            base.WriteAssets(assetFolder, target, results);
 
+            // reset firstPerson
+            if (target.GetComponent<VRMFirstPerson>() is VRMFirstPerson firstPerson)
+            {
+                firstPerson.Reset();
+            }
+        }
+
+        protected override string WritePrefab(string assetFolder, GameObject instance)
+        {
+            var prefabPath = base.WritePrefab(assetFolder, instance);
             var prefabReference = AssetDatabase.LoadAssetAtPath<GameObject>(prefabPath);
-            foreach (var clip in clips)
+            foreach (var clip in _clips)
             {
                 var so = new SerializedObject(clip);
                 so.Update();
@@ -74,7 +79,6 @@ namespace VRM
                 prop.objectReferenceValue = prefabReference;
                 so.ApplyModifiedProperties();
             }
-
             return prefabPath;
         }