diff --git a/src/manifest.json b/src/manifest.json
index b132ec8c..b0ea2de0 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -209,6 +209,7 @@
         "https://kagi.com/search*",
         "https://*.bing.com/search*",
         "https://search.yahoo.com/search*",
+        "https://search.yahoo.co.jp/search*",
         "https://search.naver.com/search*",
         "https://search.brave.com/search*",
         "https://*.yandex.com/search*",
diff --git a/src/manifest.v2.json b/src/manifest.v2.json
index 53f592fb..27878726 100644
--- a/src/manifest.v2.json
+++ b/src/manifest.v2.json
@@ -209,6 +209,7 @@
         "https://kagi.com/search*",
         "https://*.bing.com/search*",
         "https://search.yahoo.com/search*",
+        "https://search.yahoo.co.jp/search*",
         "https://search.naver.com/search*",
         "https://search.brave.com/search*",
         "https://*.yandex.com/search*",