I brought you an anime page and a manga page, it was only obvious that I'd bring you a Jpop / Kpop / Cpop / Jrock / J-whatever music page as well.

http://www.ongakusai.net/mm_new/  I highly recommended that you make an account here if you want virtually any Music from over sea's.  They post it here; new and old.  Plus they post about 35+ new releases EVERY month.  They used to be a Live journal Community with strict rules to staying as a member, but now they have moved since LJ cannot meet their demands.  Just make sure you read the rules if you join.

http://gendou.com/ a great place to find all of you favourite anime theme songs.  Need an account.  Plus it keeps tracks of how much you have downloaded.

http://www.zbsatozofjmusic.com/search/label/Rock Are you just looking for something new in your music collection?  Where here's a good place to start.  Reviews practically every Asian band that has ever created a recording.