Have u check the "supplemental language support" in the Setting -> regional & language option -> language,if not yet check then check both & hav ur Win CD ready.Other then that I'm not sure.
confirm that... windows comes with language support. i've known no other program that view jap or any other languages...expect for perhaps kanjiword or something... but it is used to write in japanese.... and btw...do u mean 'view jap words' as in a web browser or something else?