I think I have found something interesting..
Go there:
http://www.asukal.jp/English/LocalizeCABS.htm
and get the appropriate files Chinese/Japanese/Korean!
Chinese/Japanese/Korean Font file (WM5 ONLY):
http://www.asukal.jp/WM5/echinaNO5.zip
Still I am looking for a nice Japanese input system
More info there:
http://asukal.seesaa.net/article/6912738.html