diff --git a/resources/lang/ja/common.php b/resources/lang/ja/common.php
index feac9c460..2a142e55f 100644
--- a/resources/lang/ja/common.php
+++ b/resources/lang/ja/common.php
@@ -38,6 +38,7 @@ return [
     'reset' => 'リセット',
     'remove' => '削除',
     'add' => '追加',
+    'fullscreen' => 'Fullscreen',
 
     // Sort Options
     'sort_options' => 'Sort Options',