Takayanagi on Paris Transatlantic
Check out saxophonists Kaoru Abe, Mototeru Takagi, and more recently, Masayoshi Urabe. Takagi has an interesting looking solo record where he plays songs by Charles Tyler, among others - I'd like to hear that one.
Sabu Toyozumi and Masahiko Togashi are two of the most prominent drummers in Japanese improvisational music; Togashi has played with Masahiko Sato, Steve Lacy, Charlie Haden and a number of others - though I still really get the most kick out of We Now Create, a quartet from '69 with Takayanagi, Takagi and bassist/cellist Motoharu Yoshizawa. Sabu is simply a motherfucker - the duos with Abe are untouchable...
Kitty Records put out a couple of interesting international meetings of Japanese free players with both Milford Graves and Derek Bailey. These are in print on CD, and are both excellent records:
Milford Graves - Meditation Among Us w/ Abe, Takagi, Toshinori Kondo (tp), Toshi Tsuchitori (perc)
Derek Bailey - Duo and Trio Improvisation w/ Abe, Takagi, Yoshizawa, Kondo, Tsuchitori