diff --git a/l10n/ja/viewer.properties b/l10n/ja/viewer.properties
index eb584d5e7..b868dbfd2 100644
--- a/l10n/ja/viewer.properties
+++ b/l10n/ja/viewer.properties
@@ -51,8 +51,8 @@ thumb_page_title={{page}} ページ
 thumb_page_canvas=ページの縮小版 {{page}}
 
 # Context menu
-page_rotate_cw=Rotate Clockwise
-page_rotate_ccw=Rotate Counter-Clockwise
+page_rotate_cw=右回転
+page_rotate_ccw=左回転
 
 # Search panel button title and messages
 search=検索