Gagaku Homepage
Only the homepage is written in English. If you read Japanese, you can get
basic information of gagaku's history, instruments, and genres. Japanese
pages also have nice pictures and sample sound files. Probably the earliest site on Japanese music in the Japanese language.
Noh
Homepage
Insightful information with pictures and sound files.
Minoru Miki's Home page A Japanese composer who wrote a many pieces for big Japanese instrumental ensembles. He recently published a book on Japanese Instrumentation with two CDs.