diff --git a/Shared/ja.lproj/Localizable.strings b/Shared/ja.lproj/Localizable.strings
index a242d677..5be34bfe 100644
--- a/Shared/ja.lproj/Localizable.strings
+++ b/Shared/ja.lproj/Localizable.strings
@@ -602,3 +602,5 @@
 "Add %@" = "追加 %@";
 "Description preview" = "説明のプレビュー";
 "No preview" = "プレビューなし";
+"Open vertical chapters expanded" = "チャプターを縦方向に開く";
+"Chapters (if available)" = "チャプター (あれば)";