Hiroyuki Kawada is a Japanese composer who worked for Namco. He worked for Namco and composed a lot of their games' music, especially the NES soundtracks.
In Valkyrie no Bouken, he is credited as "Leo.O", which he says is his zodiac sign and blood type.
Kawada used Music Macro Language. The sound driver was most likely programmed by Nobuyuki Ohnogi.
|1985-??-??||Star Luster (ARC) (スターラスター)|
|1985-02-15||Galaga: Demons of Death (NES) (ギャラガ)|
|1985-12-06||Star Luster (FC)|
|1986-08-01||Valkyrie no Bouken: Toki no Kagi Densetsu (FC) (ワルキューレの冒険 時の鍵伝説)|
|1987-04-02||MSanma no Mei Tantei (FC) (さんまの名探偵)||Music Director|
|1987-12-04||Star Wars (FC) (スター·ウォーズ)|
|1988-??-??||Winning Run (ARC)|
|1989-??-??||Legend of Valkyrie (ARC) (ワルキューレの冒険)|
|1992-??-??||Air Combat (ARC)|
|1992-??-??||Air Combat 22 (ARC)|
|1994-11-??||Ace Driver (ARC)|
|1995-06-29||Air Combat (PS1)|
|1995-12-??||Ace Driver: Victory Lap (ARC)|
|1998-03-26||Tekken 3 (PS1)|
|2011-02-26||Ridge Racer 3D (3DS)|