If you are using windowXp, you would need to go to control panel on start menu. From there to to Date,time,language,and regional options. Then click on Regional and Lanuage options. A new window opens, it has the regional,languages,advanced tabs. Click on the language tabs. (If you need other languages other than japanese install use the supplement language support) Otherwise click on the Details.. button and find the add buttion. Clik add button then choose the language you want. Make sure to place a check for keyboard layout/IME. Thats all you need to do.