
Quick answer — Masahiro Kubota worked on GANGSTA. (Art Design), The Sky Crawlers (Art Design), Valvrave the Liberator 2 (Assistant Art Director) and 2 more anime.
Masahiro Kubota worked on GANGSTA. (Art Design), The Sky Crawlers (Art Design), Valvrave the Liberator 2 (Assistant Art Director), Valvrave the Liberator (Assistant Art Director), Clockwork Planet (Art Design).