I found this excellent site for sampling some of Japan's fantastic bands - called Project J. They provide info and a sample mp3 of about 30 of the top pop/garage/indie-type bands in Japan. Personal faves are of course Go!Go!7188, Shiina Ringo and Onitsuka Chihiro, but all of them are worth a listen. There's translations into romanji & English to help you sing along, discographies, FAQ's, and forums to discuss it all. I keep blogging about how good the Japanese music scene is, and I'm not about to stop now, so go on... give yourself a treat.