diff --git a/Assets/VRM10/Samples~/VRM10Viewer/UIToolkit/MainView.asset b/Assets/VRM10/Samples~/VRM10Viewer/UIToolkit/MainView.asset
index e696e7889..7799f8771 100644
--- a/Assets/VRM10/Samples~/VRM10Viewer/UIToolkit/MainView.asset
+++ b/Assets/VRM10/Samples~/VRM10Viewer/UIToolkit/MainView.asset
@@ -12,7 +12,7 @@ MonoBehaviour:
   m_Script: {fileID: 19101, guid: 0000000000000000e000000000000000, type: 0}
   m_Name: MainView
   m_EditorClassIdentifier: 
-  themeUss: {fileID: -4733365628477956816, guid: 7ef82646a4b7c43409ba39b532f3a687,
+  themeUss: {fileID: -4733365628477956816, guid: c943fa5ecd774bb4da807fd6453eed17,
     type: 3}
   m_TargetTexture: {fileID: 0}
   m_ScaleMode: 0
diff --git a/Assets/VRM10/Samples~/VRM10Viewer/UIToolkit/UnityDefaultRuntimeTheme.tss b/Assets/VRM10/Samples~/VRM10Viewer/UIToolkit/UnityDefaultRuntimeTheme.tss
new file mode 100644
index 000000000..1056e07ed
--- /dev/null
+++ b/Assets/VRM10/Samples~/VRM10Viewer/UIToolkit/UnityDefaultRuntimeTheme.tss
@@ -0,0 +1 @@
+@import url("unity-theme://default");
\ No newline at end of file
diff --git a/Assets/VRM10/Samples~/VRM10Viewer/UIToolkit/UnityDefaultRuntimeTheme.tss.meta b/Assets/VRM10/Samples~/VRM10Viewer/UIToolkit/UnityDefaultRuntimeTheme.tss.meta
new file mode 100644
index 000000000..7f00c8a5f
--- /dev/null
+++ b/Assets/VRM10/Samples~/VRM10Viewer/UIToolkit/UnityDefaultRuntimeTheme.tss.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: c943fa5ecd774bb4da807fd6453eed17
+ScriptedImporter:
+  internalIDToNameTable: []
+  externalObjects: {}
+  serializedVersion: 2
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 12388, guid: 0000000000000000e000000000000000, type: 0}
+  disableValidation: 0