Quick answer — Shigeru Shibuya voices Gene Starwind in Outlaw Star, Shinsuke in Samurai Champloo, Eiji Kimura in Beck: Mongolian Chop Squad and 1 more characters.
Shigeru Shibuya voices Gene Starwind (Outlaw Star), Shinsuke (Samurai Champloo), Eiji Kimura (Beck: Mongolian Chop Squad), Novem (Gilgamesh).
Gene Starwind is voiced in Japanese by Shigeru Shibuya.
