Biography
Hiroshi Seko is a Japanese screenwriter known for work in animation. Born on January 1, 1981 in Nagoya, Aichi, Seko began contributing to film projects in the mid-2010s, focusing on narrative-driven animated features and series. The screenwriter’s credits include the 2016 feature Ajin: Demi-Human – Collide, where Seko handled the screenplay, establishing a foundation in serialized storytelling for genre audiences.
Seko’s later projects expanded into series composition and film writing for major animated franchises. In 2025, Seko served as Series Composition for JUJUTSU KAISEN: Execution, a role that involves overseeing the narrative structure and continuity of a multi-episode production. The same year, Seko wrote JUJUTSU KAISEN: Hidden Inventory / Premature Death - The Movie, contributing…
