Are there any websites where you can download or buy Japanese/pop/anime music?

Gendou.com

You can always look up the songs on youtube and rip the mp3 from the video using this:

http://www.video2mp3.net/index.php

Hope that helps. Otherwise, I would recommend Gendou, which was my first choice until I saw someone else had already recommended it. :)

@Peinrikudo you can just rip songs on youtube for free????

@njnyjobs and @Peinrikudo do you buy or download at gendou.com??

http://www.jlist.com/

There are two versions for this website. one that includes adult products and one that does not.

if you don’t want those go to Jbox.com instead.

If it something that I want I usually Ebay because it is cheaper. Now there is an online store that I really enjoy purchasing from.
http://www.animeniacs.com

We used to have the store in our area but they went to a straight online venue.