diff --git a/Packages/jp.keijiro.metamesh/Editor/MetameshImporter.cs b/Packages/jp.keijiro.metamesh/Editor/MetameshImporter.cs
index 2135dd7..c83c811 100644
--- a/Packages/jp.keijiro.metamesh/Editor/MetameshImporter.cs
+++ b/Packages/jp.keijiro.metamesh/Editor/MetameshImporter.cs
@@ -23,6 +23,7 @@ public sealed class MetameshImporter : ScriptedImporter
     [SerializeField] Ring _ring = new Ring();
     [SerializeField] Disc _disc = new Disc();
     [SerializeField] bool _generateLightmapUVs = false;
+    [SerializeField] bool _readWriteMeshes = false;
 
     public override void OnImportAsset(AssetImportContext context)
     {
@@ -65,7 +66,7 @@ Mesh ImportAsMesh(string path)
 
         mesh.RecalculateBounds();
         if(_generateLightmapUVs) Unwrapping.GenerateSecondaryUVSet(mesh);
-        mesh.UploadMeshData(true);
+        mesh.UploadMeshData(!_readWriteMeshes);
 
         return mesh;
     }
diff --git a/Packages/jp.keijiro.metamesh/Editor/MetameshImporterEditor.cs b/Packages/jp.keijiro.metamesh/Editor/MetameshImporterEditor.cs
index 684ae79..7a12017 100644
--- a/Packages/jp.keijiro.metamesh/Editor/MetameshImporterEditor.cs
+++ b/Packages/jp.keijiro.metamesh/Editor/MetameshImporterEditor.cs
@@ -21,6 +21,7 @@ sealed class MetameshImporterEditor : ScriptedImporterEditor
     SerializedProperty _ring;
     SerializedProperty _disc;
     SerializedProperty _generateLightmapUVs;
+    SerializedProperty _readWriteMeshes;
 
     public override void OnEnable()
     {
@@ -35,6 +36,7 @@ public override void OnEnable()
         _ring       = serializedObject.FindProperty("_ring");
         _disc       = serializedObject.FindProperty("_disc");
         _generateLightmapUVs = serializedObject.FindProperty("_generateLightmapUVs");
+        _readWriteMeshes = serializedObject.FindProperty("_readWriteMeshes");
     }
 
     public override void OnInspectorGUI()
@@ -56,6 +58,7 @@ public override void OnInspectorGUI()
         }
 
         EditorGUILayout.PropertyField(_generateLightmapUVs);
+        EditorGUILayout.PropertyField(_readWriteMeshes);
 
         serializedObject.ApplyModifiedProperties();
         ApplyRevertGUI();