From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; ja-JP; rv:1.4) Gecko/20030922
Description of problem:
Eclipse Menu and messsage are English.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Run eclipse with ja_JP.eucJP
2. See menu
Actual Results: English
Expected Results: Japanese
Will look into instaling the language packs at eclipse.org (for U2).
This is dependent also on gcj locale being able to handle the code
Developer suite is not supported for many years. There is eclipse-nls-ja which provides what is requested on Fedora for years too.