diff --git a/Assets/VRM/Editor/SkinnedMeshUtility/MeshIntegratorEditor.cs b/Assets/VRM/Editor/SkinnedMeshUtility/MeshIntegratorEditor.cs
index 87a7f1665..5cc142875 100644
--- a/Assets/VRM/Editor/SkinnedMeshUtility/MeshIntegratorEditor.cs
+++ b/Assets/VRM/Editor/SkinnedMeshUtility/MeshIntegratorEditor.cs
@@ -1,4 +1,3 @@
-using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -12,7 +11,8 @@ using Object = UnityEngine.Object;
 namespace VRM
 {
     /// <summary>
-    /// 複数のメッシュをまとめて、BlendShapeClipに変更を反映する
+    /// 複数のメッシュを統合する。
+    /// VRM の場合、BlendShapeClip の調整が必用なのでこれも実行する。
     /// </summary>
     [DisallowMultipleComponent]
     public static class MeshIntegratorEditor
@@ -26,28 +26,11 @@ namespace VRM
                    SkinnedMeshUtility.IsPrefab(Selection.activeObject);
         }
 
-        public static void Integrate()
-        {
-            var go = Selection.activeObject as GameObject;
-
-            Integrate(go);
-        }
-
-        //[MenuItem("Assets/fooa", false)]
-        //private static void Foo()
-        //{
-        //    var go = Selection.activeObject as GameObject;
-
-        //    Debug.Log(SkinnedMeshUtility.IsPrefab(go));
-        //}
-
-
-        public static List<MeshIntegrationResult> Integrate(GameObject prefab)
+        public static List<MeshIntegrationResult> Integrate(GameObject prefab, UniGLTF.UnityPath writeAssetPath)
         {
             Undo.RecordObject(prefab, "Mesh Integration");
             var instance = SkinnedMeshUtility.InstantiatePrefab(prefab);
 
-
             var clips = new List<BlendShapeClip>();
             var proxy = instance.GetComponent<VRMBlendShapeProxy>();
             if (proxy != null && proxy.BlendShapeAvatar != null)
@@ -65,12 +48,29 @@ namespace VRM
             // Execute
             var results = VRMMeshIntegratorUtility.Integrate(instance, clips);
 
-            foreach (var res in results)
+            foreach (var result in results)
             {
-                if (res.IntegratedRenderer == null) continue;
+                if (result.IntegratedRenderer == null) continue;
 
-                SaveMeshAsset(res.IntegratedRenderer.sharedMesh, instance, res.IntegratedRenderer.gameObject.name);
-                Undo.RegisterCreatedObjectUndo(res.IntegratedRenderer.gameObject, "Integrate Renderers");
+                var assetPath = writeAssetPath.Parent.Child($"{result.IntegratedRenderer.gameObject.name}{ASSET_SUFFIX}");
+                Debug.LogFormat("CreateAsset: {0}", assetPath);
+                assetPath.CreateAsset(result.IntegratedRenderer.sharedMesh);
+                Undo.RegisterCreatedObjectUndo(result.IntegratedRenderer.gameObject, "Integrate Renderers");
+            }
+
+            // Apply to Prefab
+            var prefabPath = UniGLTF.UnityPath.FromUnityPath(AssetDatabase.GetAssetPath(prefab));
+            if (prefabPath.Equals(writeAssetPath))
+            {
+                SkinnedMeshUtility.ApplyChangesToPrefab(instance);
+            }
+            else
+            {
+                PrefabUtility.SaveAsPrefabAsset(instance, writeAssetPath.Value, out bool success);
+                if (!success)
+                {
+                    throw new System.Exception($"PrefabUtility.SaveAsPrefabAsset: {writeAssetPath}");
+                }
             }
 
             // destroy source renderers
@@ -88,9 +88,6 @@ namespace VRM
                     renderer.gameObject.SetActive(false);
                 }
             }
-
-            // Apply to Prefab
-            SkinnedMeshUtility.ApplyChangesToPrefab(instance);
             Object.DestroyImmediate(instance);
 
             return results;
@@ -143,17 +140,5 @@ namespace VRM
             assetPath = assetPath.Replace(@"\", @"/");
             return assetPath;
         }
-
-        private static void SaveMeshAsset(Mesh mesh, GameObject go, string name)
-        {
-            var assetPath = Path.Combine(GetRootPrefabPath(go), string.Format("{0}{1}",
-                name,
-                ASSET_SUFFIX
-            ));
-
-            Debug.LogFormat("CreateAsset: {0}", assetPath);
-            AssetDatabase.CreateAsset(mesh, assetPath);
-        }
-
     }
 }
diff --git a/Assets/VRM/Editor/SkinnedMeshUtility/MeshIntegratorWizard.cs b/Assets/VRM/Editor/SkinnedMeshUtility/MeshIntegratorWizard.cs
index 672f22332..70b0b4816 100644
--- a/Assets/VRM/Editor/SkinnedMeshUtility/MeshIntegratorWizard.cs
+++ b/Assets/VRM/Editor/SkinnedMeshUtility/MeshIntegratorWizard.cs
@@ -5,6 +5,7 @@ using System.Linq;
 using System;
 using System.Collections.Generic;
 using UniGLTF.MeshUtility;
+using System.IO;
 
 namespace VRM
 {
@@ -147,7 +148,21 @@ namespace VRM
                 return;
             }
 
-            integrationResults = MeshIntegratorEditor.Integrate(m_root).ToArray();
+            var prefabPath = AssetDatabase.GetAssetPath(m_root);
+            var path = EditorUtility.SaveFilePanel("save prefab", Path.GetDirectoryName(prefabPath), m_root.name, "prefab");
+            if (string.IsNullOrEmpty(path))
+            {
+                return;
+            }
+
+            var assetPath = UniGLTF.UnityPath.FromFullpath(path);
+            if (!assetPath.IsUnderAssetsFolder)
+            {
+                Debug.LogWarning($"{path} is not asset path");
+                return;
+            }
+
+            integrationResults = MeshIntegratorEditor.Integrate(m_root, assetPath).ToArray();
         }
 
         void OnWizardCreate()
diff --git a/Assets/VRM/Editor/VrmTopMenu.cs b/Assets/VRM/Editor/VrmTopMenu.cs
index 0b96ce481..a79dc302a 100644
--- a/Assets/VRM/Editor/VrmTopMenu.cs
+++ b/Assets/VRM/Editor/VrmTopMenu.cs
@@ -27,12 +27,6 @@ namespace VRM
         [MenuItem(UserMenuPrefix + "/Freeze T-Pose", priority = 20)]
         private static void FreezeTPose() => VRMHumanoidNormalizerMenu.Normalize();
 
-        [MenuItem(UserMenuPrefix + "/MeshIntegration", validate = true)]
-        private static bool MeshIntegrationValidation() => MeshIntegratorEditor.IntegrateValidation();
-
-        [MenuItem(UserMenuPrefix + "/MeshIntegration", priority = 21)]
-        private static void MeshIntegration() => MeshIntegratorEditor.Integrate();
-
         [MenuItem(UserMenuPrefix + "/MeshIntegratorWizard", priority = 21)]
         private static void OpenMeshIntegratorWizard() => MeshIntegratorWizard.CreateWizard();