IE actually offers excellent language support. Have you already downloaded all necessary language support components? if you open your IE browser, select "Tools" and head for the "Windows Update". Just check all Japanese language tools and start the download.
Basically, IE offers the following Japanese language encoding (select "View" > "Encoding"):
Here some excerpts from Microsoft's support pages:
Originally posted by Koji Hi, To view Kanji, Hiragana, and Katakana you can go omline to a site ,www.kanjisite.com to learn to read, and write in Japanese . It is the program I am useing and I highy recomend it !!!