To quickly translate any page from Japanese to English, first visit the page you would like to translate. Then paste the following into the address bar:
javascript:location.href='http://babelfish.altavista.com/tr?&lp=ja_en&url='+location.href;
You can even add a link to your favorites that will translate any page:
Translate into Japanese
These can be modified to work with different languages, and you can reverse the "ja_en" (for example) to translate in the other direction.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020123092507642