diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs
index 539bac542..0cbbb87aa 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs
@@ -49,7 +49,7 @@ namespace UniGLTF
                 Data.MigrationFlags.IsRoughnessTextureValueSquared);
             MaterialFactory = new MaterialFactory(ExternalObjectMap
                 .Where(x => x.Value is Material)
-                .ToDictionary(x => x.Key, x => (Material)x.Value), MaterialFallback.FallbackShaders);
+                .ToDictionary(x => x.Key, x => (Material)x.Value));
             AnimationClipFactory = new AnimationClipFactory(ExternalObjectMap
                 .Where(x => x.Value is AnimationClip)
                 .ToDictionary(x => x.Key, x => (AnimationClip)x.Value));
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialFallback.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialFallback.cs
deleted file mode 100644
index 3b4978bce..000000000
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialFallback.cs
+++ /dev/null
@@ -1,20 +0,0 @@
-using System.Collections.Generic;
-
-namespace UniGLTF
-{
-    /// <summary>
-    /// 過去バージョンに含まれていたが、廃止・統合された Shader のフォールバック情報
-    /// </summary>
-    public static class MaterialFallback
-    {
-        static Dictionary<string, string> s_fallbackShaders = new Dictionary<string, string>
-        {
-            {"VRM/UnlitTexture", "Unlit/Texture"},
-            {"VRM/UnlitTransparent", "Unlit/Transparent"},
-            {"VRM/UnlitCutout", "Unlit/Transparent Cutout"},
-            {"UniGLTF/StandardVColor", UniGLTF.UniUnlit.UniUnlitUtil.ShaderName},
-        };
-
-        public static IReadOnlyDictionary<string, string> FallbackShaders => s_fallbackShaders;
-    }
-}
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialFallback.cs.meta b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialFallback.cs.meta
deleted file mode 100644
index ab0c0d9d4..000000000
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialFallback.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: feb59fa02250d3d4db41cfa1c2e2b032
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/Assets/VRM/Runtime/IO/MaterialIO/BuiltInRP/Import/Materials/BuiltInVrmMToonMaterialImporter.cs b/Assets/VRM/Runtime/IO/MaterialIO/BuiltInRP/Import/Materials/BuiltInVrmMToonMaterialImporter.cs
index 026de35e2..954dd5d3b 100644
--- a/Assets/VRM/Runtime/IO/MaterialIO/BuiltInRP/Import/Materials/BuiltInVrmMToonMaterialImporter.cs
+++ b/Assets/VRM/Runtime/IO/MaterialIO/BuiltInRP/Import/Materials/BuiltInVrmMToonMaterialImporter.cs
@@ -9,6 +9,17 @@ namespace VRM
 {
     public static class BuiltInVrmMToonMaterialImporter
     {
+        /// <summary>
+        /// 過去バージョンに含まれていたが、廃止・統合された Shader のフォールバック情報
+        /// </summary>
+        public static Dictionary<string, string> FallbackShaders = new Dictionary<string, string>
+        {
+            {"VRM/UnlitTexture", "Unlit/Texture"},
+            {"VRM/UnlitTransparent", "Unlit/Transparent"},
+            {"VRM/UnlitCutout", "Unlit/Transparent Cutout"},
+            {"UniGLTF/StandardVColor", UniGLTF.UniUnlit.UniUnlitUtil.ShaderName},
+        };
+
         private static readonly string[] MToonTextureSlots = new string[]
         {
             "_MainTex",
@@ -51,6 +62,11 @@ namespace VRM
             //
             // use material.name, because material name may renamed in GltfParser.
             var name = data.GLTF.materials[materialIdx].name;
+            var shaderName = vrmMaterial.shader;
+            if (FallbackShaders.ContainsKey(shaderName))
+            {
+                shaderName = FallbackShaders[shaderName];
+            }
 
             var textureSlots = new Dictionary<string, TextureDescriptor>();
             var floatValues = new Dictionary<string, float>();
@@ -59,7 +75,7 @@ namespace VRM
             var actions = new List<Action<Material>>();
             matDesc = new MaterialDescriptor(
                 name,
-                vrmMaterial.shader,
+                shaderName,
                 vrmMaterial.renderQueue,
                 textureSlots,
                 floatValues,
diff --git a/Assets/VRM/Runtime/VRM.asmdef b/Assets/VRM/Runtime/VRM.asmdef
index 0a3337f3e..e18ce1e85 100644
--- a/Assets/VRM/Runtime/VRM.asmdef
+++ b/Assets/VRM/Runtime/VRM.asmdef
@@ -8,7 +8,8 @@
         "GUID:301b251fd9834274c9228e0532f444f7",
         "GUID:a9bc101fb0471f94a8f99fd242fdd934",
         "GUID:ac229b552c3025545b074203f857547c",
-        "GUID:1cd941934d098654fa21a13f28346412"
+        "GUID:1cd941934d098654fa21a13f28346412",
+        "GUID:60c8346e00a8ddd4cafc5a02eceeec57"
     ],
     "includePlatforms": [],
     "excludePlatforms": [],
diff --git a/Assets/VRMShaders/GLTF/IO/Runtime/Material/Importer/MaterialFactory.cs b/Assets/VRMShaders/GLTF/IO/Runtime/Material/Importer/MaterialFactory.cs
index 90e08f6d8..e968c3194 100644
--- a/Assets/VRMShaders/GLTF/IO/Runtime/Material/Importer/MaterialFactory.cs
+++ b/Assets/VRMShaders/GLTF/IO/Runtime/Material/Importer/MaterialFactory.cs
@@ -12,12 +12,10 @@ namespace VRMShaders
     public class MaterialFactory : IResponsibilityForDestroyObjects
     {
         private readonly IReadOnlyDictionary<SubAssetKey, Material> m_externalMap;
-        private readonly IReadOnlyDictionary<string, string> m_fallbackShaders;
 
-        public MaterialFactory(IReadOnlyDictionary<SubAssetKey, Material> externalMaterialMap, IReadOnlyDictionary<string, string> fallbackShaders)
+        public MaterialFactory(IReadOnlyDictionary<SubAssetKey, Material> externalMaterialMap)
         {
             m_externalMap = externalMaterialMap;
-            m_fallbackShaders = fallbackShaders;
         }
 
         public struct MaterialLoadInfo
@@ -108,11 +106,6 @@ namespace VRMShaders
             {
                 throw new Exception("no shader name");
             }
-            if (m_fallbackShaders.TryGetValue(shaderName, out string fallback))
-            {
-                Debug.LogWarning($"fallback: {shaderName} => {fallback}");
-                shaderName = fallback;
-            }
 
             var shader = Shader.Find(shaderName);
             if (shader == null)