diff --git a/Scripts/Format/Editor/VRMExportObjectEditor.cs b/Scripts/Format/Editor/VRMExportObjectEditor.cs
index 9a6fffd51..6f1ddb05b 100644
--- a/Scripts/Format/Editor/VRMExportObjectEditor.cs
+++ b/Scripts/Format/Editor/VRMExportObjectEditor.cs
@@ -56,7 +56,11 @@ namespace VRM
                             "vrm");
                     if (!string.IsNullOrEmpty(path))
                     {
-                        Export(path);
+                        var target = m_target;
+                        EditorApplication.delayCall += () =>
+                        {
+                            target.Settings.Export(path);
+                        };
                     }
                 }
             }
@@ -93,19 +97,5 @@ namespace VRM
                 }
             }
         }
-
-        void Export(string path)
-        {
-            Debug.LogFormat("export: {0}", path);
-
-            /*
-            using (var instance = new DisposableInstance(m_source.objectReferenceValue as GameObject))
-            {
-                var vrm = VRMExporter.Export(instance.GameObject);
-                var bytes = vrm.ToGlbBytes();
-                File.WriteAllBytes(path, bytes);
-            }
-            */
-        }
     }
 }
diff --git a/Scripts/Format/Editor/VRMExporterMenu.cs b/Scripts/Format/Editor/VRMExporterMenu.cs
index c60a7be1b..34790f8fa 100644
--- a/Scripts/Format/Editor/VRMExporterMenu.cs
+++ b/Scripts/Format/Editor/VRMExporterMenu.cs
@@ -1,10 +1,6 @@
-using System.Collections.Generic;
-using System.Linq;
+using System.Text;
 using UnityEditor;
 using UnityEngine;
-using UniGLTF;
-using System.IO;
-using System.Text;
 
 
 namespace VRM
@@ -43,36 +39,7 @@ namespace VRM
             }
 
             // export
-            var target = m_settings.Source;
-            if (m_settings.PoseFreeze)
-            {
-                Undo.RecordObjects(m_settings.Source.transform.Traverse().ToArray(), "before normalize");
-                var map = new Dictionary<Transform, Transform>();
-                target = VRM.BoneNormalizer.Execute(m_settings.Source.gameObject, map, m_settings.ForceTPose);
-                VRMHumanoidNorimalizerMenu.CopyVRMComponents(m_settings.Source.gameObject, target, map);
-                Undo.PerformUndo();
-            }
-
-            var sw = System.Diagnostics.Stopwatch.StartNew();
-
-            var vrm = VRMExporter.Export(target);
-            vrm.extensions.VRM.meta.title = m_settings.Title;
-            vrm.extensions.VRM.meta.author = m_settings.Author;
-
-            var bytes = vrm.ToGlbBytes();
-            File.WriteAllBytes(path, bytes);
-
-            Debug.LogFormat("Export elapsed {0}", sw.Elapsed);
-
-            if (m_settings.Source.gameObject != target)
-            {
-                GameObject.DestroyImmediate(target);
-            }
-
-            if (path.StartsWithUnityAssetPath())
-            {
-                AssetDatabase.ImportAsset(path.ToUnityRelativePath());
-            }
+            m_settings.Export(path);
         }
 
         void OnWizardUpdate()
diff --git a/Scripts/Format/Editor/VRMHumanoidNormalizerMenu.cs b/Scripts/Format/Editor/VRMHumanoidNormalizerMenu.cs
index 49b746384..aa098743f 100644
--- a/Scripts/Format/Editor/VRMHumanoidNormalizerMenu.cs
+++ b/Scripts/Format/Editor/VRMHumanoidNormalizerMenu.cs
@@ -50,122 +50,8 @@ namespace VRM
             Undo.RecordObjects(go.transform.Traverse().ToArray(), "before normalize");
             var map = new Dictionary<Transform, Transform>();
             var normalized = VRM.BoneNormalizer.Execute(go, map, true);
-            CopyVRMComponents(go, normalized, map);
+            VRMExportSettings.CopyVRMComponents(go, normalized, map);
             Undo.PerformUndo();
         }
-
-        //
-        // トップレベルのMonoBehaviourを移植する
-        //
-        public static void CopyVRMComponents(GameObject go, GameObject root, 
-            Dictionary<Transform, Transform> map)
-        {
-            {
-                // blendshape
-                var src = go.GetComponent<VRMBlendShapeProxy>();
-                if (src != null)
-                {
-                    var dst = root.AddComponent<VRMBlendShapeProxy>();
-                    dst.BlendShapeAvatar = src.BlendShapeAvatar;
-                }
-            }
-
-            {
-                var secondary = go.transform.Find("secondary");
-                if (secondary == null)
-                {
-                    secondary = go.transform;
-                }
-
-                var dstSecondary = root.transform.Find("secondary");
-                if (dstSecondary == null)
-                {
-                    dstSecondary = new GameObject("secondary").transform;
-                    dstSecondary.SetParent(root.transform, false);
-                }
-
-                // 揺れモノ
-                foreach (var src in go.transform.Traverse().Select(x => x.GetComponent<VRMSpringBoneColliderGroup>()).Where(x => x != null))
-                {
-                    var dst = map[src.transform];
-                    var dstColliderGroup = dst.gameObject.AddComponent<VRMSpringBoneColliderGroup>();
-                    dstColliderGroup.Colliders = src.Colliders.Select(y =>
-                    {
-                        var offset = dst.worldToLocalMatrix.MultiplyPoint(src.transform.localToWorldMatrix.MultiplyPoint(y.Offset));
-                        return new VRMSpringBoneColliderGroup.SphereCollider
-                        {
-                            Offset = offset,
-                            Radius = y.Radius
-                        };
-                    }).ToArray();
-                }
-
-                foreach (var src in go.transform.Traverse().SelectMany(x => x.GetComponents<VRMSpringBone>()))
-                {
-                    var dst = dstSecondary.gameObject.AddComponent<VRMSpringBone>();
-                    dst.m_comment = src.m_comment;
-                    dst.RootBones = src.RootBones.Select(x => map[x]).ToList();
-                    if (src.ColliderGroups != null)
-                    {
-                        dst.ColliderGroups = src.ColliderGroups.Select(x => map[x.transform].GetComponent<VRMSpringBoneColliderGroup>()).ToArray();
-                    }
-                }
-            }
-
-            {
-                // meta(obsolete)
-                var src = go.GetComponent<VRMMetaInformation>();
-                if (src != null)
-                {
-                    src.CopyTo(root);
-                }
-            }
-            {
-                // meta
-                var src = go.GetComponent<VRMMeta>();
-                if (src != null)
-                {
-                    var dst = root.AddComponent<VRMMeta>();
-                    dst.Meta = src.Meta;
-                }
-            }
-
-            {
-                // firstPerson
-                var src = go.GetComponent<VRMFirstPerson>();
-                if (src != null)
-                {
-                    src.CopyTo(root, map);
-                }
-            }
-
-            {
-                // lookAt
-                var src = go.GetComponent<VRMLookAt>();
-                if (src != null)
-                {
-                    src.CopyTo(root, map);
-                }
-            }
-
-            {
-                // humanoid
-                var dst = root.AddComponent<VRMHumanoidDescription>();
-                var src = go.GetComponent<VRMHumanoidDescription>();
-                if (src != null)
-                {
-                    dst.Avatar = src.Avatar;
-                    dst.Description = src.Description;
-                }
-                else
-                {
-                    var animator = go.GetComponent<Animator>();
-                    if (animator != null)
-                    {
-                        dst.Avatar = animator.avatar;
-                    }
-                }
-            }
-        }
     }
 }
diff --git a/Scripts/Format/VRMExporSettings.cs b/Scripts/Format/VRMExporSettings.cs
index 747481cdd..a12176368 100644
--- a/Scripts/Format/VRMExporSettings.cs
+++ b/Scripts/Format/VRMExporSettings.cs
@@ -1,6 +1,10 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using UnityEngine;
+using UniGLTF;
+using UnityEditor;
+using System.IO;
 
 
 namespace VRM
@@ -84,5 +88,196 @@ namespace VRM
                 //Author = "";
             }
         }
+
+        //
+        // トップレベルのMonoBehaviourを移植する
+        //
+        public static void CopyVRMComponents(GameObject go, GameObject root,
+            Dictionary<Transform, Transform> map)
+        {
+            {
+                // blendshape
+                var src = go.GetComponent<VRMBlendShapeProxy>();
+                if (src != null)
+                {
+                    var dst = root.AddComponent<VRMBlendShapeProxy>();
+                    dst.BlendShapeAvatar = src.BlendShapeAvatar;
+                }
+            }
+
+            {
+                var secondary = go.transform.Find("secondary");
+                if (secondary == null)
+                {
+                    secondary = go.transform;
+                }
+
+                var dstSecondary = root.transform.Find("secondary");
+                if (dstSecondary == null)
+                {
+                    dstSecondary = new GameObject("secondary").transform;
+                    dstSecondary.SetParent(root.transform, false);
+                }
+
+                // 揺れモノ
+                foreach (var src in go.transform.Traverse().Select(x => x.GetComponent<VRMSpringBoneColliderGroup>()).Where(x => x != null))
+                {
+                    var dst = map[src.transform];
+                    var dstColliderGroup = dst.gameObject.AddComponent<VRMSpringBoneColliderGroup>();
+                    dstColliderGroup.Colliders = src.Colliders.Select(y =>
+                    {
+                        var offset = dst.worldToLocalMatrix.MultiplyPoint(src.transform.localToWorldMatrix.MultiplyPoint(y.Offset));
+                        return new VRMSpringBoneColliderGroup.SphereCollider
+                        {
+                            Offset = offset,
+                            Radius = y.Radius
+                        };
+                    }).ToArray();
+                }
+
+                foreach (var src in go.transform.Traverse().SelectMany(x => x.GetComponents<VRMSpringBone>()))
+                {
+                    var dst = dstSecondary.gameObject.AddComponent<VRMSpringBone>();
+                    dst.m_comment = src.m_comment;
+                    dst.RootBones = src.RootBones.Select(x => map[x]).ToList();
+                    if (src.ColliderGroups != null)
+                    {
+                        dst.ColliderGroups = src.ColliderGroups.Select(x => map[x.transform].GetComponent<VRMSpringBoneColliderGroup>()).ToArray();
+                    }
+                }
+            }
+
+            {
+                // meta(obsolete)
+                var src = go.GetComponent<VRMMetaInformation>();
+                if (src != null)
+                {
+                    src.CopyTo(root);
+                }
+            }
+            {
+                // meta
+                var src = go.GetComponent<VRMMeta>();
+                if (src != null)
+                {
+                    var dst = root.AddComponent<VRMMeta>();
+                    dst.Meta = src.Meta;
+                }
+            }
+
+            {
+                // firstPerson
+                var src = go.GetComponent<VRMFirstPerson>();
+                if (src != null)
+                {
+                    src.CopyTo(root, map);
+                }
+            }
+
+            {
+                // lookAt
+                var src = go.GetComponent<VRMLookAt>();
+                if (src != null)
+                {
+                    src.CopyTo(root, map);
+                }
+            }
+
+            {
+                // humanoid
+                var dst = root.AddComponent<VRMHumanoidDescription>();
+                var src = go.GetComponent<VRMHumanoidDescription>();
+                if (src != null)
+                {
+                    dst.Avatar = src.Avatar;
+                    dst.Description = src.Description;
+                }
+                else
+                {
+                    var animator = go.GetComponent<Animator>();
+                    if (animator != null)
+                    {
+                        dst.Avatar = animator.avatar;
+                    }
+                }
+            }
+        }
+
+        public static bool IsPrefab(GameObject go)
+        {
+            return go.scene.name == null;
+        }
+
+        struct RecordDisposer : IDisposable
+        {
+            public RecordDisposer(UnityEngine.Object[] objects, string msg)
+            {
+                Undo.RecordObjects(objects, msg);
+            }
+
+            public void Dispose()
+            {
+                Undo.PerformUndo();
+            }
+        }
+
+#if UNITY_EDITOR
+        public void Export(string path)
+        {
+            List<GameObject> destroy = new List<GameObject>();
+            try
+            {
+                Export(path, destroy);
+            }
+            finally
+            {
+                foreach (var x in destroy)
+                {
+                    Debug.LogFormat("destroy: {0}", x.name);
+                    GameObject.DestroyImmediate(x);
+                }
+            }
+        }
+
+        void Export(string path, List<GameObject> destroy)
+        { 
+            var target = Source;
+            if (IsPrefab(target))
+            {
+                using (new RecordDisposer(Source.transform.Traverse().ToArray(), "before normalize"))
+                {
+                    target = GameObject.Instantiate(target);
+                    destroy.Add(target);
+                }
+            }
+            if (PoseFreeze)
+            {
+                using (new RecordDisposer(target.transform.Traverse().ToArray(), "before normalize"))
+                {
+                    var map = new Dictionary<Transform, Transform>();
+                    var copy = BoneNormalizer.Execute(target, map, ForceTPose);
+                    CopyVRMComponents(target, copy, map);
+                    target = copy;
+                    destroy.Add(target);
+                }
+            }
+
+            {
+                var sw = System.Diagnostics.Stopwatch.StartNew();
+                var vrm = VRMExporter.Export(target);
+                vrm.extensions.VRM.meta.title = Title;
+                vrm.extensions.VRM.meta.author = Author;
+
+                var bytes = vrm.ToGlbBytes();
+                File.WriteAllBytes(path, bytes);
+                Debug.LogFormat("Export elapsed {0}", sw.Elapsed);
+            }
+
+            if (path.StartsWithUnityAssetPath())
+            {
+                AssetDatabase.ImportAsset(path.ToUnityRelativePath());
+            }
+        }
+#endif
     }
 }
diff --git a/Scripts/Format/VRMExportObject.cs b/Scripts/Format/VRMExportObject.cs
index c278f1a52..e701ac1e9 100644
--- a/Scripts/Format/VRMExportObject.cs
+++ b/Scripts/Format/VRMExportObject.cs
@@ -7,6 +7,6 @@ namespace VRM
     public class VRMExportObject : ScriptableObject
     {
         [SerializeField]
-        public VRMExportSettings Settings;
+        public VRMExportSettings Settings = new VRMExportSettings();
     }
 }
diff --git a/Scripts/SkinnedMeshUtility/Editor/BoneNormalizer.cs b/Scripts/SkinnedMeshUtility/BoneNormalizer.cs
similarity index 100%
rename from Scripts/SkinnedMeshUtility/Editor/BoneNormalizer.cs
rename to Scripts/SkinnedMeshUtility/BoneNormalizer.cs
diff --git a/Scripts/SkinnedMeshUtility/Editor/BoneNormalizer.cs.meta b/Scripts/SkinnedMeshUtility/BoneNormalizer.cs.meta
similarity index 100%
rename from Scripts/SkinnedMeshUtility/Editor/BoneNormalizer.cs.meta
rename to Scripts/SkinnedMeshUtility/BoneNormalizer.cs.meta