Souichi Masui
- Birthday: 3/29/1966
- Place of birth: Urawa, Saitama, Japan
- Fame for: Directing
- 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
Biography
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).
