Keiichi Sato (さとう けいいち, Satō Keiichi, born December 18, 1965) is a Japanese animation director, mecha and character designer born in Kagawa Prefecture.^[1]

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.^[2] Sato's style is influenced by his "love of all things nostalgic."

Filmography

Director

• Karas (2005)^[3]
• Tiger & Bunny (2011)^[3]
• Asura (2012)^[4]
• Black Butler (2014)^[5]
• Saint Seiya: Legend of Sanctuary (2014)^[6]
• Rage of Bahamut: Genesis (2014)^[7]
• Gantz: O (2016, chief director)^[8]
• Rage of Bahamut: Virgin Soul (2017)^[9]
• Inuyashiki (2017, chief director)^[10]
• Go! Go! Loser Ranger! (2024)^[11]

Other

• Mobile Suit Gundam: Char's Counterattack (Key Animation)
• Genesis Survivor Gaiarth (Animation Director (ep. 3))
• Giant Robo (Animation supervisor)
• Mobile Suit Victory Gundam (Animation Director)
• Fatal Fury: The Motion Picture (Key Animation)
• Junkers Come Here (Original Character Design)
• The Brave of Gold Goldran (Animation Director (eps. 12, 16, 21))
• Brave Command Dagwon (Opening Animation (op1))
• Ninja Resurrection (Character Design, Chief Animation Director)
• Urotsukidoji (Character Design)
• City Hunter: Goodbye my Sweetheart (Character design, Chief animation supervisor)
• Sentimental Graffiti (Visual director)
• City Hunter: Death of the Vicious Criminal Ryo Saeba (Character design)
• The Big O (Original concept, Character design, Mecha designer)
• The SoulTaker (Storyboard (ep. 5), Creature design, OP director)
• Mazinkaiser (Mecha design)
• Wolf's Rain (Animation director)
• Mazinkaiser: Shitou! Ankoku Daishogun (Mecha design)
• Mobile Suit Gundam Unicorn (Animation Director (ep. 1))
• C (Conceptual Design)
• Unofficial Sentai Akibaranger (Character design)