Souichi Masui (増井 壮一, Masui Sōichi, born 1966) is a Japanese anime director and storyboard artist from Urawa City, Saitama Prefecture (currently Saitama City). He sometimes works under the pseudonym Kazuma Mizukusa (水草一馬).
Known For : Directing
Birthday : 1966-03-29
Place of Birth : Urawa, Saitama, Japan
Also Known As : Sôichi Masui, Sōichi Masui, 増井 壮一, Soichi Masui, Kazuma Mizusaka, 水草一馬, ますい そういち, Kazuma Mizukusa