diff --git a/ChangeLog b/ChangeLog
index d1733e654..a0b58dfa8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -28,6 +28,7 @@
 - TW-1724 some commands show color codes when redirected (thanks to Alan Young).
 - TW-1729 zsh completion: zregexparse:4: not enough regex argument (thanks to
           Daniel Shahaf).
+- TW-1738 add defined languages JAPANESE (thanks to ribbon).
 - Fixed broken build for Cygwin and older GCC (thanks to Richard Boß).
 - The default configuration is now 256-color only.
 - The 'columns' report now shows whether a column is modifiable or read only.
diff --git a/INSTALL b/INSTALL
index e0aecdbcf..d0f615c50 100644
--- a/INSTALL
+++ b/INSTALL
@@ -119,6 +119,7 @@ Currently the defined languages are:
   por_PRT 6
   epo_RUS 7
   pol_POL 8
+  jpn-JPN 9
 
 
 Uninstallation