diff --git a/locales/en-US.yml b/locales/en-US.yml
index 19dda947d9..e240f0b121 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -731,6 +731,8 @@ desktop/views/components/settings.vue:
   note-visibility: "Post visibility"
   default-note-visibility: "Default visibility"
   remember-note-visibility: "Remember post visibility"
+  web-search-engine: "ウェブ検索エンジン"
+  web-search-engine-desc: "例: https://www.google.com/?#q={{query}}"
   auto-popout: "Auto pop-out window"
   auto-popout-desc: "If it's possible, pop-out display will be used instead of opening a new window. This setting is stored in your browser."
   advanced: "Advanced settings"
@@ -1371,6 +1373,8 @@ mobile/views/pages/settings.vue:
   note-visibility: "Post visibility"
   default-note-visibility: "Default visibility"
   remember-note-visibility: "Remember post visibility"
+  web-search-engine: "ウェブ検索エンジン"
+  web-search-engine-desc: "例: https://www.google.com/?#q={{query}}"
   disable-via-mobile: "Don't mark the post as 'from mobile'"
   load-raw-images: "Show attached images in original quality"
   load-remote-media: "Show media from a remote server"