I tryed to add the original composer credits for the album, here's what should be verified:
Shinobi 3: i credited all 3 composers known for the soundtrack [Masayuki Nagao, Hirofumi Murasaki, Morihiko Akiyama], i don't think we ever had a detailled breakdown.
Altered Beast: not sure about this one, Genesis version seems to be credited to
Toshio Kai and not
Master.
Gadget Twins: two composers, Barry Leitch, Ian Howe, the second one is credited for the title music.
Rocket Knight Adventures: i haven't credited this game at all since i don't have a breakdown and there's a lot of poeple credited here: Masanori Ohuchi, Aki Hata, Masanori Adachi, Hiroshi Kobayashi, Michiru Yamane.