diff --git a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialParameterImporter.cs b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialParameterImporter.cs
index c3880069a..dcaaf9f80 100644
--- a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialParameterImporter.cs
+++ b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialParameterImporter.cs
@@ -86,6 +86,13 @@ namespace UniVRM10
                 yield return (MToon.Utils.PropShadeShift, shadingShift.Value);
             }
 
+            var shadingShiftTextureScale = mToon?.ShadingShiftTexture?.Scale;
+            if (shadingShiftTextureScale.HasValue)
+            {
+                Debug.LogWarning("Need VRM 1.0 MToon implementation.");
+                yield return ("_NEED_IMPLEMENTATION_MTOON_1_0_shadingShiftTextureScale", shadingShiftTextureScale.Value);
+            }
+
             var shadingToony = mToon?.ShadingToonyFactor;
             if (shadingToony.HasValue)
             {
diff --git a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialTextureImporter.cs b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialTextureImporter.cs
index e707f5459..5f2f33ddc 100644
--- a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialTextureImporter.cs
+++ b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialTextureImporter.cs
@@ -34,7 +34,7 @@ namespace UniVRM10
             if (TryGetShadingShiftTexture(parser, mToon, out var shadeShiftTex))
             {
                 Debug.LogWarning("Need VRM 1.0 MToon implementation.");
-                yield return ("_NEED_IMPLEMENTATION_MTOON_1_0", shadeShiftTex);
+                yield return ("_NEED_IMPLEMENTATION_MTOON_1_0_shadingShiftTexture", shadeShiftTex);
             }
 
             if (TryGetMatcapTexture(parser, mToon, out var matcapTex))