diff --git a/res/values-ja/strings.xml b/res/values-ja/strings.xml
index b1944e756..4629cfaed 100644
--- a/res/values-ja/strings.xml
+++ b/res/values-ja/strings.xml
@@ -75,6 +75,8 @@
     <string name="message_compose_quoted_text_label">"元のメッセージ"</string>
     <string name="message_compose_error_no_recipients">"宛先を入力してください。"</string>
     <string name="message_compose_attachments_skipped_toast">"ダウンロードされていない添付ファイルは転送できません。"</string>
+    <!-- no translation found for message_compose_attachment_size (4401081828287333647) -->
+    <skip />
     <string name="message_view_to_label">"To:"</string>
     <string name="message_view_cc_label">"Cc:"</string>
     <string name="message_view_attachment_view_action">"開く"</string>