This is a really interesting question actually. The name is Noriyuki Iwadare, but even he doesn't seem to know the truth!
From his own official webpage:
http://www5a.biglobe.ne.jp/~iwadare/works/pce.htmlHe says that it was so long ago, that he doesn't remember every PC-Engine game he worked on! He remembers a few, but
Alien Crush and Devil Crash are not listed here.
But if we look at his discography:
デビル・クラッシュ/エイリアン・クラッシュ 1990/06/25 TKCA-30097 ¥2500 "Devil Crush/Alien Crush"
This entry though is only listed under the "Arranged CD" Section seen here:
http://www5a.biglobe.ne.jp/~iwadare/works/other_cd.htmlSo its possible that he only did the arranged versions of the music, and not the original songs. So until he actually
remembers his own works, we may not ever know the truth....
Today he does stuff for Disney and is quite popular. Back then though he was brand new and did anything he
could get, so he probably worked on a LOT of PCE games in some form. The Japanese are horrible about
keeping records sadly.