diff --git a/config/locales/ja.yml b/config/locales/ja.yml
index e6a0fbaa2..641126d21 100644
--- a/config/locales/ja.yml
+++ b/config/locales/ja.yml
@@ -67,6 +67,9 @@ ja:
     saml:
       feature_not_enabled: SAML feature not enabled for this account
       sso_not_enabled: SAML SSO is not enabled for this installation
+    conversations:
+      unread_counts:
+        feature_not_enabled: Conversation unread counts feature not enabled for this account
     data_import:
       data_type:
         invalid: 無効なデータ型。