diff --git a/adev-ja/src/app/sub-navigation-data.ts b/adev-ja/src/app/sub-navigation-data.ts
index d0cac1f8d..69ebacad2 100644
--- a/adev-ja/src/app/sub-navigation-data.ts
+++ b/adev-ja/src/app/sub-navigation-data.ts
@@ -507,7 +507,7 @@ const DOCS_SUB_NAVIGATION_DATA: NavigationItem[] = [
             contentPath: 'guide/testing/utility-apis',
           },
           {
-            label: 'Experimental unit testing integration',
+            label: '実験的なユニットテストシステム',
             path: 'guide/testing/unit-tests',
             contentPath: 'guide/testing/experimental-unit-test',
           },