Keiichi Satō

is a Japanese animation director, mecha and character designer born in Kagawa Prefecture. In 1996, Sato met with Kazuyoshi Katayama to begin work on The Big O. Until then, Sato's work consisted mainly of designing characters and supervising animation for anime series. The Big O is the first based on a concept of his creation and he considers it his magnum opus. Sato's style is influenced by his "love of all things nostalgic." Filmography Director Karas (2005) Tiger & Bunny (2011) Asura (2012) Black Butler (2014) Saint Seiya: Legend of Sanctuary (2014) Rage of Bahamut: Genesis (2014) Gantz: O (2016, chief director) Rage of Bahamut: Virgin Soul (2017) Inuyashiki (2017, chief director) Go! Go! Loser Ranger! (2024)