diff --git a/features/i18n.nix b/features/i18n.nix
index 6b7e7f5..abb8be0 100644
--- a/features/i18n.nix
+++ b/features/i18n.nix
@@ -6,7 +6,7 @@
     defaultLocale = "en_US.UTF-8";
 
     extraLocales = [
-      "ja_JP.UTF-8/UTF-8"
+      "ja_JP.UTF-8"
     ];
 
     extraLocaleSettings = {