Japanese Auto-Detection-----------Everything OK
Japanese Shift-JIS -------------------Chinese Characters NOT OK, JP Characters OK
Japanese EUC------------------------Chinese Characters NOT OK, JP Characters OK
Chinese BIG5 (繁體中文)-----------Everything OK
Chinese simplified ( 簡體 )---------Chinese Characters NOT OK, JP Characters OK
It seems to me that for IE 6 , the only one that works with Japanese characters is Big 5 Chinese character setting (also the web site language setting)
My opera works for me as well, and that's why I never noticed that the Japanese wasn't working properly in other browsers.