Gradius (AC): Miki Higashino is credited in a couple of interviews at least, and liner notes (Gradius III, Gradius Arcade). There is no mention of other people doing Gradius 1 so I guess she did all.
Furukawa lists in his site and interviews Gradius 2 MSX.
Gradius III liner notes give these credits
- Prophet FUKAMI (Seichi Fukami): leader
- La Nakamoor (sp?) (Keizou Nakamura): new member, did "Underground" and "Mechanical Base" only.
- MIKI-CHANG (Miki Higashino): did "Dead End Cell", "Cosmo Plant" and "King of Kings" (only, I think)
- J_KANE (Junichiro Kaneda): doesn't say. Since Fukami talks about Higashino and Nakamura's music, but not this man, maybe he didn't compose?
- Mutsuhiko Izumi doesn't talk in the liner notes. S.E.?
Gradius IV only credits Atsuki, though Harumi Ueko performs and comments in the liner notes.
I'll see if I can find credits for the bonus tracks and other credits in liner notes.