diff --git a/Assets/VRM10/Editor/ScriptedImporter/VrmScriptedImporterEditorGUI.cs b/Assets/VRM10/Editor/ScriptedImporter/VrmScriptedImporterEditorGUI.cs
index 7ee835e14..071f61e98 100644
--- a/Assets/VRM10/Editor/ScriptedImporter/VrmScriptedImporterEditorGUI.cs
+++ b/Assets/VRM10/Editor/ScriptedImporter/VrmScriptedImporterEditorGUI.cs
@@ -38,7 +38,7 @@ namespace UniVRM10
                 m_parser = null;
                 return;
             }
-            m_model = VrmLoader.CreateVrmModel(m_parser);
+            m_model = ModelReader.Read(m_parser);
         }
 
         enum Tabs
diff --git a/Assets/VRM10/Runtime/IO/ComponentBuilder.cs b/Assets/VRM10/Runtime/IO/ComponentBuilder.cs
deleted file mode 100644
index eace97c9e..000000000
--- a/Assets/VRM10/Runtime/IO/ComponentBuilder.cs
+++ /dev/null
@@ -1,29 +0,0 @@
-using System;
-using UnityEngine;
-using System.Linq;
-using System.Collections.Generic;
-
-namespace UniVRM10
-{
-    public static class ComponentBuilder
-    {
-        #region Util
-        static (Transform, Mesh) GetTransformAndMesh(Transform t)
-        {
-            var skinnedMeshRenderer = t.GetComponent<SkinnedMeshRenderer>();
-            if (skinnedMeshRenderer != null)
-            {
-                return (t, skinnedMeshRenderer.sharedMesh);
-            }
-
-            var filter = t.GetComponent<MeshFilter>();
-            if (filter != null)
-            {
-                return (t, filter.sharedMesh);
-            }
-
-            return default;
-        }
-        #endregion
-    }
-}
diff --git a/Assets/VRM10/Runtime/IO/MeshLoader.cs b/Assets/VRM10/Runtime/IO/MeshLoader.cs
index d199dd2f8..5f5af64d2 100644
--- a/Assets/VRM10/Runtime/IO/MeshLoader.cs
+++ b/Assets/VRM10/Runtime/IO/MeshLoader.cs
@@ -1,12 +1,17 @@
 using System;
 using UnityEngine;
-using UnityEngine.Rendering;
 
 namespace UniVRM10
 {
     public static class MeshLoader
     {
-        public static void LoadMesh(this Mesh mesh, VrmLib.Mesh src, VrmLib.Skin skin = null)
+        /// <summary>
+        /// VrmLib.Mesh => UnityEngine.Mesh
+        /// </summary>
+        /// <param name="mesh"></param>
+        /// <param name="src"></param>
+        /// <param name="skin"></param>
+        public static void LoadMesh(this UnityEngine.Mesh mesh, VrmLib.Mesh src, VrmLib.Skin skin = null)
         {
             mesh.vertices = src.VertexBuffer.Positions.GetSpan<Vector3>().ToArray();
             mesh.normals = src.VertexBuffer.Normals?.GetSpan<Vector3>().ToArray();
diff --git a/Assets/VRM10/Runtime/IO/ModelLoader.cs b/Assets/VRM10/Runtime/IO/Model/ModelReader.cs
similarity index 82%
rename from Assets/VRM10/Runtime/IO/ModelLoader.cs
rename to Assets/VRM10/Runtime/IO/Model/ModelReader.cs
index 0c283ed05..876c3c855 100644
--- a/Assets/VRM10/Runtime/IO/ModelLoader.cs
+++ b/Assets/VRM10/Runtime/IO/Model/ModelReader.cs
@@ -1,12 +1,15 @@
-using System;
+using System.IO;
 using System.Linq;
 using VrmLib;
 
 namespace UniVRM10
 {
-    public static class ModelLoader
+    /// <summary>
+    /// GLTF => VrmLib.Model
+    /// </summary>
+    public static class ModelReader
     {
-        public static Model Load(Vrm10Storage storage, string rootName)
+        static Model Load(Vrm10Storage storage, string rootName)
         {
             if (storage == null)
             {
@@ -70,5 +73,13 @@ namespace UniVRM10
 
             return model;
         }
+
+        public static Model Read(UniGLTF.GltfParser parser)
+        {
+            var storage = new Vrm10Storage(parser);
+            var model = Load(storage, Path.GetFileName(parser.TargetPath));
+            model.ConvertCoordinate(Coordinates.Unity);
+            return model;
+        }
     }
 }
diff --git a/Assets/VRM10/Runtime/IO/RuntimeVrmConverter.cs.meta b/Assets/VRM10/Runtime/IO/Model/ModelReader.cs.meta
similarity index 83%
rename from Assets/VRM10/Runtime/IO/RuntimeVrmConverter.cs.meta
rename to Assets/VRM10/Runtime/IO/Model/ModelReader.cs.meta
index a49ea9a83..f9a24df05 100644
--- a/Assets/VRM10/Runtime/IO/RuntimeVrmConverter.cs.meta
+++ b/Assets/VRM10/Runtime/IO/Model/ModelReader.cs.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 6b619b24f8ac1494290458193ebca6aa
+guid: fb219f8797f990649a7531dbb96d3305
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2
diff --git a/Assets/VRM10/Runtime/IO/RuntimeVrmConverter.cs b/Assets/VRM10/Runtime/IO/Model/ModelWriter.cs
similarity index 99%
rename from Assets/VRM10/Runtime/IO/RuntimeVrmConverter.cs
rename to Assets/VRM10/Runtime/IO/Model/ModelWriter.cs
index afe1b3369..b8d28d7f1 100644
--- a/Assets/VRM10/Runtime/IO/RuntimeVrmConverter.cs
+++ b/Assets/VRM10/Runtime/IO/Model/ModelWriter.cs
@@ -16,7 +16,6 @@ namespace UniVRM10
         public List<UnityEngine.Material> Materials = new List<UnityEngine.Material>();
         public Dictionary<UnityEngine.Mesh, VrmLib.MeshGroup> Meshes = new Dictionary<UnityEngine.Mesh, VrmLib.MeshGroup>();
 
-        #region Export 1.0
         /// <summary>
         /// metaObject が null のときは、root から取得する
         /// </summary>
@@ -123,9 +122,6 @@ namespace UniVRM10
 
             return Model;
         }
-        #endregion
-
-
 
         private static void CreateNodes(
             Transform parentTransform,
diff --git a/Assets/VRM10/Runtime/IO/ComponentBuilder.cs.meta b/Assets/VRM10/Runtime/IO/Model/ModelWriter.cs.meta
similarity index 83%
rename from Assets/VRM10/Runtime/IO/ComponentBuilder.cs.meta
rename to Assets/VRM10/Runtime/IO/Model/ModelWriter.cs.meta
index 95f8dff4e..f387fd775 100644
--- a/Assets/VRM10/Runtime/IO/ComponentBuilder.cs.meta
+++ b/Assets/VRM10/Runtime/IO/Model/ModelWriter.cs.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: a6cc4e6978a4fdf40999cc13aaa472fe
+guid: fd51b1ef2f1840e438e6a91fe1389a75
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2
diff --git a/Assets/VRM10/Runtime/IO/ModelLoader.cs.meta b/Assets/VRM10/Runtime/IO/ModelLoader.cs.meta
deleted file mode 100644
index 9930454b6..000000000
--- a/Assets/VRM10/Runtime/IO/ModelLoader.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 42576b7471f4a4e4fb25c1815a92f44b
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/Assets/VRM10/Runtime/IO/RuntimeUnityBuilder.cs b/Assets/VRM10/Runtime/IO/RuntimeUnityBuilder.cs
index 0fc7406cf..159a94883 100644
--- a/Assets/VRM10/Runtime/IO/RuntimeUnityBuilder.cs
+++ b/Assets/VRM10/Runtime/IO/RuntimeUnityBuilder.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
 using UniGLTF;
@@ -24,7 +25,7 @@ namespace UniVRM10
         : base(parser, externalObjectMap.Select(kv => (kv.Key.Name, kv.Value)))
         {
             m_externalMap = externalObjectMap;
-            m_model = VrmLoader.CreateVrmModel(parser);
+            m_model = ModelReader.Read(parser);
 
             // for `VRMC_materials_mtoon`
             this.GltfMaterialImporter.GltfMaterialParamProcessors.Insert(0, Vrm10MaterialImporter.TryCreateParam);
diff --git a/Assets/VRM10/Runtime/IO/VrmLoader.cs b/Assets/VRM10/Runtime/IO/VrmLoader.cs
deleted file mode 100644
index cc59d996d..000000000
--- a/Assets/VRM10/Runtime/IO/VrmLoader.cs
+++ /dev/null
@@ -1,20 +0,0 @@
-using System.IO;
-using VrmLib;
-using UniGLTF;
-
-namespace UniVRM10
-{
-    /// <summary>
-    /// utility for load VrmLib Model from byte[]
-    /// </summary>
-    public static class VrmLoader
-    {
-        public static Model CreateVrmModel(GltfParser parser)
-        {
-            var storage = new Vrm10Storage(parser);
-            var model = ModelLoader.Load(storage, Path.GetFileName(parser.TargetPath));
-            model.ConvertCoordinate(Coordinates.Unity);
-            return model;
-        }
-    }
-}
diff --git a/Assets/VRM10/Runtime/IO/VrmLoader.cs.meta b/Assets/VRM10/Runtime/IO/VrmLoader.cs.meta
deleted file mode 100644
index af911b20b..000000000
--- a/Assets/VRM10/Runtime/IO/VrmLoader.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: ef069ccddc286cc4e930ba33447b0094
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/Assets/VRM10/Tests/ApiSampleTests.cs b/Assets/VRM10/Tests/ApiSampleTests.cs
index fa72a5dd5..a79b552ce 100644
--- a/Assets/VRM10/Tests/ApiSampleTests.cs
+++ b/Assets/VRM10/Tests/ApiSampleTests.cs
@@ -1,9 +1,7 @@
-using System;
-using System.IO;
+using System.IO;
 using NUnit.Framework;
 using UniGLTF;
 using UnityEngine;
-using UnityEngine.TestTools;
 using VRMShaders;
 
 namespace UniVRM10.Test
@@ -17,7 +15,7 @@ namespace UniVRM10.Test
             var parser = new GltfParser();
             parser.Parse("migrated", bytes);
 
-            var model = UniVRM10.VrmLoader.CreateVrmModel(parser);
+            var model = ModelReader.Read(parser);
             return model;
         }