I was just poking around on Dusty Groove, and I see that Yamataifu, an album by Toshiyuki Miyama & His New Herd with Masahiko Sato, is going to be reissued in June. Unfortunately, it looks like it's going to be reissued on vinyl only.
The music on Yamataifu is a pleasingly weird mix of new & old, avant-garde and traditional big band. I think all of the compositions and arrangements are by Sato. You can hear it on YT here.
Sato made a whole series of records with Miyama's "New Herd," among them: Canto of Libra (1970), Yamataifu (1972), Straight Ahead (1974), and Nayutagenjo (1976).
For my money, Nayutagenjo is the pick of the bunch, so I'm hoping it'll be reissued at some point -- but Yamataifu is very interesting too.