diff --git a/Assets/VRM.Samples/Editor/Tests/VRMImportExportTests.cs b/Assets/VRM.Samples/Editor/Tests/VRMImportExportTests.cs
index c9c721cfe..cf25c4252 100644
--- a/Assets/VRM.Samples/Editor/Tests/VRMImportExportTests.cs
+++ b/Assets/VRM.Samples/Editor/Tests/VRMImportExportTests.cs
@@ -25,7 +25,7 @@ namespace VRM.Samples
         {
             get
             {
-                return Path.GetFullPath(Application.dataPath + "/../Tests/Models/Alicia_vrm-0.40/AliciaSolid_vrm-0.40.vrm")
+                return Path.GetFullPath(Application.dataPath + "/../Tests/Models/Alicia_vrm-0.51/AliciaSolid_vrm-0.51.vrm")
                     .Replace("\\", "/");
             }
         }
@@ -139,7 +139,7 @@ namespace VRM.Samples
             File.WriteAllText("new.json", newJson);
 
             // 比較
-            Assert.AreEqual(oldJson, newJson);
+            Assert.AreEqual(oldJson.ParseAsJson().ToString(), newJson.ParseAsJson().ToString());
 
             // 生成デシリアライザでロードする
             var ff = new JsonFormatter();
@@ -147,7 +147,7 @@ namespace VRM.Samples
             ff.Clear();
             ff.GenSerialize(des);
             var desJson = ff.ToString().ParseAsJson().ToString("  ");
-            Assert.AreEqual(oldJson, desJson);
+            Assert.AreEqual(oldJson.ParseAsJson().ToString(), desJson.ParseAsJson().ToString());
         }
     }
 }
diff --git a/Assets/VRM/UniGLTF/Editor/Tests/UniGLTFTests.cs b/Assets/VRM/UniGLTF/Editor/Tests/UniGLTFTests.cs
index b202b072d..a453d0176 100644
--- a/Assets/VRM/UniGLTF/Editor/Tests/UniGLTFTests.cs
+++ b/Assets/VRM/UniGLTF/Editor/Tests/UniGLTFTests.cs
@@ -668,7 +668,7 @@ namespace UniGLTF
                 {
                     var context = new ImporterContext
                     {
-                        UseUniJSONParser = true
+                        SerializerType = SerializerTypes.UniJSON
                     };
                     context.ParseJson(json, new SimpleStorage(new ArraySegment<byte>(new byte[1024 * 1024])));
                     //Debug.LogFormat("{0}", context.Json);
diff --git a/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs b/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs
new file mode 100644
index 000000000..9dc459c36
--- /dev/null
+++ b/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs
@@ -0,0 +1,9 @@
+namespace UniGLTF
+{
+    public enum SerializerTypes
+    {
+        JsonSerializable, // manual, Obsolete
+        UniJSON, // reflection
+        Generated, // generated, experimental for mobile
+    }
+}
diff --git a/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs.meta b/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs.meta
new file mode 100644
index 000000000..6ff72b756
--- /dev/null
+++ b/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 2b17414c7f3ba564083dbcebda778633
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/VRM/UniGLTF/Scripts/Format/glTF.cs b/Assets/VRM/UniGLTF/Scripts/Format/glTF.cs
index dad76ad86..f7de69655 100644
--- a/Assets/VRM/UniGLTF/Scripts/Format/glTF.cs
+++ b/Assets/VRM/UniGLTF/Scripts/Format/glTF.cs
@@ -468,10 +468,10 @@ namespace UniGLTF
             return f.ToString();
         }
 
-        public byte[] ToGlbBytes(bool UseUniJSONSerializer = false)
+        public byte[] ToGlbBytes(SerializerTypes serializer = SerializerTypes.UniJSON)
         {
             string json;
-            if (UseUniJSONSerializer)
+            if (serializer == SerializerTypes.UniJSON)
             {
                 var c = new JsonSchemaValidationContext(this)
                 {
@@ -479,9 +479,20 @@ namespace UniGLTF
                 };
                 json = JsonSchema.FromType(GetType()).Serialize(this, c);
             }
+            else if (serializer == SerializerTypes.Generated)
+            {
+                var f = new JsonFormatter();
+                f.GenSerialize(this);
+                json = f.ToString().ParseAsJson().ToString("  ");
+            }
+            else if(serializer == SerializerTypes.JsonSerializable)
+            {
+                // Obsolete
+                json = ToJson();
+            }
             else
             {
-                json = ToJson();
+                throw new Exception("[UniVRM Export Error] unknown serializer type");
             }
 
             RemoveUnusedExtensions(json);
diff --git a/Assets/VRM/UniGLTF/Scripts/IO/ImporterContext.cs b/Assets/VRM/UniGLTF/Scripts/IO/ImporterContext.cs
index 1c2c81201..8f1824bb2 100644
--- a/Assets/VRM/UniGLTF/Scripts/IO/ImporterContext.cs
+++ b/Assets/VRM/UniGLTF/Scripts/IO/ImporterContext.cs
@@ -271,18 +271,25 @@ namespace UniGLTF
             }
         }
 
-        public bool UseUniJSONParser;
+        private SerializerTypes _serializerType = SerializerTypes.UniJSON;
+        public SerializerTypes SerializerType { get { return _serializerType; } set { _serializerType = value; } }
+
         public virtual void ParseJson(string json, IStorage storage)
         {
             Json = json;
             Storage = storage;
 
-            if (UseUniJSONParser)
+            if (_serializerType == SerializerTypes.UniJSON)
             {
                 Json.ParseAsJson().Deserialize(ref GLTF);
             }
-            else
+            else if (_serializerType == SerializerTypes.Generated)
             {
+                GLTF = GltfDeserializer.Deserialize(json.ParseAsJson());
+            }
+            else if (_serializerType == SerializerTypes.JsonSerializable)
+            {
+                // Obsolete
                 GLTF = JsonUtility.FromJson<glTF>(Json);
             }
 
diff --git a/Assets/VRM/UniVRM/Scripts/Format/VRMExportSettings.cs b/Assets/VRM/UniVRM/Scripts/Format/VRMExportSettings.cs
index 659456f9d..c96f71c7f 100644
--- a/Assets/VRM/UniVRM/Scripts/Format/VRMExportSettings.cs
+++ b/Assets/VRM/UniVRM/Scripts/Format/VRMExportSettings.cs
@@ -383,7 +383,7 @@ namespace VRM
                 vrm.extensions.VRM.meta.reference = Reference;
 
 
-                var bytes = vrm.ToGlbBytes(UseExperimentalExporter);
+                var bytes = vrm.ToGlbBytes(UseExperimentalExporter?SerializerTypes.Generated:SerializerTypes.UniJSON);
                 File.WriteAllBytes(path, bytes);
                 Debug.LogFormat("Export elapsed {0}", sw.Elapsed);
             }