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).
Professor Layton and the Eternal Diva
Rascal Does Not Dream of a Dreaming Girl
Fullmetal Alchemist: O Conquistador de Shamballa
Evangelion: 2.0 Você (Não) Pode Avançar
Pokémon: Lucario e o Mistério de Mew
Trigun: Badlands Rumble
UN-GO episode:0 INGA-RON
Crayon Shin-chan: Invoke a Storm! The Singing Buttocks Bomb
Crayon Shin-chan: Invoke a Storm! Me and the Space Princess
Crayon Shin-chan: Fierceness That Invites Storm! Operation Golden Spy
True School Ghosts
RahXephon Interlude: Her and Herself/Thatness and Thereness
Rascal Does Not Dream of a Sister Venturing Out
Rascal Does Not Dream of a Knapsack Kid
The Truth of Grimm Brothers' Fairy Tales
The Truth of Japanese Fairy Tales
Chaika -The Coffin Princess-
Beck
My Hero Academia
Samurai Champloo
Ergo Proxy
Rascal Does Not Dream of Bunny Girl Senpai
Soul Eater
Dennou Coil
RahXephon
Michiko & Hatchin
Kemonozume
Animal Detectives Kiruminzoo
Canaan
Scrapped Princess
Psycho-Pass
The Heroic Legend of Arslan
Knights of Sidonia
Noragami
Sakura Quest
Appare-Ranman!
