LiveUpdate Administrator ships with the help system in English. When the help system in Japanese is available, a .zip file is attached to this KB article.
LiveUpdate Administrator 2.3.10 and later
To change the LiveUpdate Administrator help system from English to Japanese:
LUA_Install_Directory\tomcat\webapps\lua\onlinehelp\JA_JP
You should now be able to access online help in Japanese from the LiveUpdate Administrator console on the top right menu as well as any context-sensitive help calls.
To revert back to the English help system:
LUA_Install_Directory\tomcat\webapps\lua\onlinehelp\JA_JP
Japanese is the only supported language.