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 Rascal Does Not Dream of a Dreaming Girl 2019 Rascal Does Not Dream of a Knapsack Kid 2023 Rascal Does Not Dream of a Sister Venturing Out 2023 Crayon Shin-chan: Fierceness That Invites Storm! Me and the Space Princess 2012 Features 12 Rascal Does Not Dream of a Dear Friend 2026
★ 7.7 Rascal Does Not Dream of a Sister Venturing Out 2023
★ 7.7 Rascal Does Not Dream of a Knapsack Kid 2023
★ 8.2 Rascal Does Not Dream of a Dreaming Girl 2019
★ 6.5 Crayon Shin-chan: Fierceness That Invites Storm! Me and the Space Princess 2012
★ 6.7 Crayon Shin-chan: Fierceness That Invites Storm! Operation Golden Spy 2011
Series ★ 7.3 RahXephon 2002
Series ★ 6.8 Shingu: Secret of the Stellar Wars 2001
The Truth of Grimm Brothers' Fairy Tales 2000
The Truth of Japanese Fairy Tales 2000
★ 4 True School Ghosts 1999
Series ★ 5.3 School Ghosts 1995
Short films 1 RahXephon Interlude: Her and Herself/Thatness and Thereness 2003
