Bonsai's Jpop Pages: Huge collection of Jpop and jrock pages on practically every artist/band imaginable.
Vivamusic.com: Diverse site with a very large collection of jpop information and music videos.
Tomobiki.com J-Pop/J-Rock Guide: Vibrant, informative site with biographical information on bands and sound samples.
The Birth of Japanese Pop Music: Interesting and informative article on the birth of kayokyoku, the Japanese word for pop music.
Top 40 Chart: The current top 40 singles in Japan, illustrating the mix of Japanese and Western artists.
Celebration of Visual Rock: Great site with information on five popular Visual Rock bands.
Visual Rock Art: A very fancy site on visual rock.
Visual Rock Dimension: Another very nicely made Visual Rock website.
TokyoPop.com article: Excellent article on Japanese Electronica.
Launch.com article: Another great article on Japanese pop/electronic music.
Japanese Electronica CDs: A selection of some of the newest Japanese Electronica CDs.
Skanime Nation: Website which provides information and links on Japanese ska music.
The Japanese Ska Page: Small, simple page with links to a large selection of Japanese ska bands.
The Japan Punk Project Home: Great site with tons of useful information on Japanese Punk.
In Dog We Trust: Website with tons of photographs of Japanese punk/hardcore bands.
J-Underground: Site with lots of information on Japanese punk and hardcore bands.

Disclaimer:

All images used on this site were taken from one of the sites listed above and are being used solely for educational purposes. If I have used an image from your website and you would prefer that I not, please contact me at theisen@mit.edu and I will remove the image immediately.