diff --git a/l10n/.tx/config b/l10n/.tx/config
index 62324f24886be632e5e45ba528ed08106a7e9852..ba2d192909fcc162f76b7a5fc6c429a56dc39017 100644
--- a/l10n/.tx/config
+++ b/l10n/.tx/config
@@ -1,5 +1,6 @@
 [main]
 host = https://www.transifex.com
+lang_map = ja_JP: ja
 
 [owncloud.core]
 file_filter = <lang>/core.po