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Biography
Masashi Koizuka is an animator and director. He was born in 1980 and graduated from Hosei University. Koizuka is a talented artist who made his director debut on Tales of Asteria. He then moved on to the animation production company, Bee Train Co., Ltd. Over the course of his career, he oversaw the performances and delivery for Robotics;Notes, and moved on to become the assistant director and prop designer on the Attack on Titan series after he joined WIT studio in 2013. Sakura con 2016 was his first US appearance.
Filmography9 titles

Attack on Titan
2013Animation Director, Director, Key Animation, Prop Designer, Series Director, Storyboard Artist
2013Animation Director, Director, Key Animation, Prop Designer, Series Director, Storyboard Artist

Attack on Titan: The Roar of Awakening
2018Director
2018Director

Seraph of the End
2015Director
2015Director

Durarara!!
2010Key Animation
2010Key Animation

Attack on Titan: Chronicle
2020Director
2020Director

Gankutsuou: The Count of Monte Cristo
2004Key Animation
2004Key Animation

Hanasaku Iroha
2011Key Animation
2011Key Animation

Moonrise
2025Series Composition, Series Director
2025Series Composition, Series Director

Robotics;Notes
2012Director
2012Director