It is quite possible and in many cases advisable to run a Japanese language input environment on an English (or other language) installation of Ubuntu. Please note that if you want to type in Japanese using English (or any other language) Ubuntu or if you want to get all the special Japanese repositories set up and Japanese fonts configured correctly, I suggest following the instruction below instead! This will log into a Japanese session with a Japanese locale and hopefully menus and programs will be in Japanese too. If however you are wanting to run Ubuntu in Japanese and you already have an installation, you can easily add Japanese translation by adding Japanese in the 'Language Support' dialogue (System / Administration in Gnome), selecting Japanese as default language, loggin out and then selecting Japanese under 'Select Language' at the log on screen. Perhaps a good place to start if you are a native Japanese speaker is the official Japanese Ubuntu website. Chiefly information regarding setting up Ubuntu in Japanese, setting up a Japanese language input environment in Ubuntu that is set up in a language other than Japanese and programs that you might find useful. Here you will find information regarding using Japanese with Ubuntu.

This page is is the top level community documentation (English) page for Japanese language in Ubuntu.

Japanese Language Related Software in Ubuntu.

How to watch japanese tv on ubuntu