Directing
Soichi Masui
March 29 1966- Place of birth: Urawa, Saitama, Japan
- Gender: Male
- Also known as: Sôichi Masui, Sōichi Masui, 増井 壮一, Kazuma Mizusaka, 水草一馬, ますい そういち, Kazuma Mizukusa
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).
