diff --git a/l10n/ja/viewer.properties b/l10n/ja/viewer.properties
index 7323bd125..0d66c15a1 100644
--- a/l10n/ja/viewer.properties
+++ b/l10n/ja/viewer.properties
@@ -86,9 +86,9 @@ find_not_found=見つかりませんでした。
 error_more_info=詳細情報
 error_less_info=詳細情報の非表示
 error_close=閉じる
-# LOCALIZATION NOTE (error_build): "{{build}}" will be replaced by the PDF.JS
-# build ID.
-error_build=PDF.JS Build: {{build}}
+# LOCALIZATION NOTE (error_version_info): "{{version}}" and "{{build}}" will be
+# replaced by the PDF.JS version and build ID.
+error_version_info=PDF.js v{{version}} (ビルド: {{build}})
 # LOCALIZATION NOTE (error_message): "{{message}}" will be replaced by an
 # english string describing the error.
 error_message=メッセージ: {{message}}