This is how to make your computer Japanese ready. Macusers, click here . I use Macintosh. I know nothing about windows.
Most sites have tech support pages.
If you use Macintosh, you can update your OS to Mac OS 9. Mac OS 9 comes with build-in multilanguage capabilities. Click here to go to Apple Mac OS page for more info. Mac OS X comes with Mac OS 9 disk. Click here to learn more about Mac OS X. Click here to get the latest price at UH Bookstore.