How do you change the language of your keyboard from american standard to Japanese standard?

I have an acer and microsoft 2002 edition, how do I change my keyboard language from American to japanese? Help please!|||You'll have to install Microsoft IME (or Kotoeri if you're using Mac) to do that. This site can explain it better than I can: http://www.coscom.co.jp/learnjapanese801鈥?/a>