diff --git a/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/EditorMaterial.cs b/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/EditorMaterial.cs
index 84a4d350e..ad8262bba 100644
--- a/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/EditorMaterial.cs
+++ b/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/EditorMaterial.cs
@@ -33,14 +33,14 @@ namespace UniGLTF
         static bool s_foldMaterials = true;
         static bool s_foldTextures = true;
 
-        public static void OnGUI(ScriptedImporter importer, GltfParser parser, EnumerateAllTexturesDistinctFunc enumTextures)
+        public static void OnGUI(ScriptedImporter importer, GltfParser parser, EnumerateAllTexturesDistinctFunc enumTextures, Func<string, string> textureDir, Func<string, string> materialDir)
         {
             var hasExternal = importer.GetExternalObjectMap().Any(x => x.Value is Material || x.Value is Texture2D);
             using (new TmpGuiEnable(!hasExternal))
             {
                 if (GUILayout.Button("Extract Materials And Textures ..."))
                 {
-                    ExtractMaterialsAndTextures(importer, parser, enumTextures);
+                    ExtractMaterialsAndTextures(importer, parser, enumTextures, textureDir, materialDir);
                 }
             }
 
@@ -85,7 +85,7 @@ namespace UniGLTF
             AssetDatabase.ImportAsset(self.assetPath, ImportAssetOptions.ForceUpdate);
         }
 
-        static void ExtractMaterialsAndTextures(ScriptedImporter self, GltfParser parser, EnumerateAllTexturesDistinctFunc enumTextures)
+        static void ExtractMaterialsAndTextures(ScriptedImporter self, GltfParser parser, EnumerateAllTexturesDistinctFunc enumTextures, Func<string, string> textureDir, Func<string, string> materialDir)
         {
             if (string.IsNullOrEmpty(self.assetPath))
             {
@@ -99,12 +99,12 @@ namespace UniGLTF
             Action<IEnumerable<UnityPath>> onCompleted = _ =>
                 {
                     AssetDatabase.ImportAsset(self.assetPath, ImportAssetOptions.ForceUpdate);
-                    self.ExtractMaterials();
+                    self.ExtractMaterials(materialDir);
                     AssetDatabase.ImportAsset(self.assetPath, ImportAssetOptions.ForceUpdate);
                 };
 
             var assetPath = UnityPath.FromFullpath(parser.TargetPath);
-            var dirName = $"{assetPath.FileNameWithoutExtension}.Textures";
+            var dirName = textureDir(assetPath.Value); // $"{assetPath.FileNameWithoutExtension}.Textures";
             TextureExtractor.ExtractTextures(parser, assetPath.Parent.Child(dirName),
                 enumTextures,
                 self.GetSubAssets<UnityEngine.Texture2D>(self.assetPath).ToArray(),
@@ -113,13 +113,13 @@ namespace UniGLTF
                 );
         }
 
-        public static void ExtractMaterials(this ScriptedImporter importer)
+        public static void ExtractMaterials(this ScriptedImporter importer, Func<string, string> materialDir)
         {
             if (string.IsNullOrEmpty(importer.assetPath))
             {
                 return;
             }
-            var path = $"{Path.GetDirectoryName(importer.assetPath)}/{Path.GetFileNameWithoutExtension(importer.assetPath)}.Materials";
+            var path = $"{Path.GetDirectoryName(importer.assetPath)}/{materialDir(importer.assetPath)}"; //  Path.GetFileNameWithoutExtension(importer.assetPath)}.Materials
             if (!Directory.Exists(path))
             {
                 Directory.CreateDirectory(path);
diff --git a/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/GlbScriptedImporterEditorGUI.cs b/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/GlbScriptedImporterEditorGUI.cs
index 08f38013c..65e4d14d2 100644
--- a/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/GlbScriptedImporterEditorGUI.cs
+++ b/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/GlbScriptedImporterEditorGUI.cs
@@ -1,5 +1,6 @@
 using UnityEditor;
 using UnityEngine;
+using System.IO;
 #if UNITY_2020_2_OR_NEWER
 using UnityEditor.AssetImporters;
 #else
@@ -48,7 +49,9 @@ namespace UniGLTF
                     break;
 
                 case Tabs.Materials:
-                    EditorMaterial.OnGUI(m_importer, m_parser, GltfTextureEnumerator.EnumerateAllTexturesDistinct);
+                    EditorMaterial.OnGUI(m_importer, m_parser, GltfTextureEnumerator.EnumerateAllTexturesDistinct,
+                    assetPath => $"{Path.GetFileNameWithoutExtension(assetPath)}.Textures",
+                    assetPath => $"{Path.GetFileNameWithoutExtension(assetPath)}.Materials");
                     break;
             }
         }
diff --git a/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/GltfScriptedImporterEditorGUI.cs b/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/GltfScriptedImporterEditorGUI.cs
index 8e90514ab..f184f1cb6 100644
--- a/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/GltfScriptedImporterEditorGUI.cs
+++ b/Assets/UniGLTF/Editor/UniGLTF/ScriptedImporter/GltfScriptedImporterEditorGUI.cs
@@ -1,5 +1,6 @@
 using UnityEditor;
 using UnityEngine;
+using System.IO;
 #if UNITY_2020_2_OR_NEWER
 using UnityEditor.AssetImporters;
 #else
@@ -48,7 +49,9 @@ namespace UniGLTF
                     break;
 
                 case Tabs.Materials:
-                    EditorMaterial.OnGUI(m_importer, m_parser, GltfTextureEnumerator.EnumerateAllTexturesDistinct);
+                    EditorMaterial.OnGUI(m_importer, m_parser, GltfTextureEnumerator.EnumerateAllTexturesDistinct,
+                    assetPath => $"{Path.GetFileNameWithoutExtension(assetPath)}.Textures",
+                    assetPath => $"{Path.GetFileNameWithoutExtension(assetPath)}.Materials");
                     break;
             }
         }
diff --git a/Assets/VRM10/Editor/ScriptedImporter/EditorVrm.cs b/Assets/VRM10/Editor/ScriptedImporter/EditorVrm.cs
index af858b4b7..1a1caf646 100644
--- a/Assets/VRM10/Editor/ScriptedImporter/EditorVrm.cs
+++ b/Assets/VRM10/Editor/ScriptedImporter/EditorVrm.cs
@@ -46,7 +46,6 @@ namespace UniVRM10
             if (GUILayout.Button("Clear"))
             {
                 importer.ClearExternalObjects<VRM10MetaObject>();
-                importer.ClearExternalObjects<VRM10ExpressionAvatar>();
                 importer.ClearExternalObjects<VRM10Expression>();
             }
         }
@@ -79,7 +78,7 @@ namespace UniVRM10
 
             // meta
             {
-                var path = GetAndCreateFolder(importer.assetPath, ".Meta");
+                var path = GetAndCreateFolder(importer.assetPath, ".vrm1.Meta");
                 foreach (var (key, asset) in importer.GetSubAssets<VRM10MetaObject>(importer.assetPath))
                 {
                     asset.ExtractSubAsset($"{path}/{asset.name}.asset", false);
@@ -88,30 +87,12 @@ namespace UniVRM10
 
             {
                 // expressions
-                var path = GetAndCreateFolder(importer.assetPath, ".Expressions");
+                var path = GetAndCreateFolder(importer.assetPath, ".vrm1.Expressions");
                 foreach (var (key, asset) in importer.GetSubAssets<VRM10Expression>(importer.assetPath))
                 {
                     asset.ExtractSubAsset($"{path}/{asset.name}.asset", false);
                 }
-            }
-            {
-                // expressions
-                var path = GetAndCreateFolder(importer.assetPath, ".ExpressionAvatar");
-                foreach (var (key, asset) in importer.GetSubAssets<VRM10ExpressionAvatar>(importer.assetPath))
-                {
-                    asset.ExtractSubAsset($"{path}/{asset.name}.asset", false);
-                }
 
-                // external な expressionAvatar.Clips に 再代入する
-                var expressionAvatar = importer.GetExternalObjectMap().Select(x => x.Value as VRM10ExpressionAvatar).FirstOrDefault(x => x != null);
-                var expressions = importer.GetExternalObjectMap().Select(x => x.Value as VRM10Expression).Where(x => x != null).ToList();
-                expressionAvatar.Clips = expressions;
-                var avatarPath = AssetDatabase.GetAssetPath(expressionAvatar);
-                if (!string.IsNullOrEmpty(avatarPath))
-                {
-                    EditorUtility.SetDirty(expressionAvatar);
-                    AssetDatabase.WriteImportSettingsIfDirty(avatarPath);
-                }
             }
 
             AssetDatabase.ImportAsset(importer.assetPath, ImportAssetOptions.ForceUpdate);
diff --git a/Assets/VRM10/Editor/ScriptedImporter/VrmScriptedImporterEditorGUI.cs b/Assets/VRM10/Editor/ScriptedImporter/VrmScriptedImporterEditorGUI.cs
index ca62fabc0..1d8f69369 100644
--- a/Assets/VRM10/Editor/ScriptedImporter/VrmScriptedImporterEditorGUI.cs
+++ b/Assets/VRM10/Editor/ScriptedImporter/VrmScriptedImporterEditorGUI.cs
@@ -1,6 +1,7 @@
 using UnityEditor;
 using UnityEngine;
 using UniGLTF;
+using System.IO;
 #if UNITY_2020_2_OR_NEWER
 using UnityEditor.AssetImporters;
 #else
@@ -68,7 +69,9 @@ namespace UniVRM10
                 case Tabs.Materials:
                     if (m_parser != null)
                     {
-                        EditorMaterial.OnGUI(m_importer, m_parser, Vrm10TextureEnumerator.EnumerateAllTexturesDistinct);
+                        EditorMaterial.OnGUI(m_importer, m_parser, Vrm10TextureEnumerator.EnumerateAllTexturesDistinct,
+                            assetPath => $"{Path.GetFileNameWithoutExtension(assetPath)}.vrm1.Textures",
+                            assetPath => $"{Path.GetFileNameWithoutExtension(assetPath)}.vrm1.Materials");
                     }
                     break;