Check out Number Girl (http://www.musicwhore.org/artists/artist.php?artist=144) -- EXCELLENT :)


Hear some of thier music here (http://www.soundclick.com/bands/1/numbergirlmusic.htm)

not jus some. tons of japanese music is awesome. a few of the greatest artists include

gackt
maximum the hormone
The GazettE

and a lot of other are great as well