diff --git a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
index f684739ae..7022c63cd 100644
--- a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
+++ b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
@@ -152,7 +152,9 @@ namespace UniVRM10
                 const float invertY = -1f;
                 mtoon.UvAnimationScrollYSpeedFactor = context.UvAnimationScrollYSpeedFactor * invertY;
             }
-            mtoon.UvAnimationRotationSpeedFactor = context.UvAnimationRotationSpeedFactor;
+            // Speed unit Conversion
+            const float rotationPerSecToRadianPerSec = Mathf.PI * 2f;
+            mtoon.UvAnimationRotationSpeedFactor = context.UvAnimationRotationSpeedFactor * rotationPerSecToRadianPerSec;
 
             // Texture Transforms
             var scale = context.TextureScale;
diff --git a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialImporter.cs b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialImporter.cs
index c0a5420a1..83d4fa9f6 100644
--- a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialImporter.cs
+++ b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialImporter.cs
@@ -224,7 +224,9 @@ namespace UniVRM10
             var uvAnimSpeedRotation = mToon?.UvAnimationRotationSpeedFactor;
             if (uvAnimSpeedRotation.HasValue)
             {
-                yield return (MToon10Prop.UvAnimationRotationSpeedFactor.ToUnityShaderLabName(), uvAnimSpeedRotation.Value);
+                // Speed unit Conversion
+                const float radianPerSecToRotationPerSec = 1f / (Mathf.PI * 2f);
+                yield return (MToon10Prop.UvAnimationRotationSpeedFactor.ToUnityShaderLabName(), uvAnimSpeedRotation.Value * radianPerSecToRotationPerSec);
             }
 
             // UI