Biography
Hiroshi Seko (瀬古 浩司) is a Japanese anime screenwriter, also credited as Kouji Seko, Koji Seko or Kōji Seko. He was born in 1981 in Nagoya, Aichi Prefecture. He began in production roles at Gainax before writing episode scripts, including for Panty & Stocking with Garterbelt (2010).
Seko has worked extensively as a series composer and writer on television anime, including Attack on Titan (2013–2023), Mob Psycho 100 (2016–2022), Vinland Saga (2019–2023), Jujutsu Kaisen (2020–), Chainsaw Man (2022) and Dan Da Dan (2024). He has also written screenplays for films such as Jujutsu Kaisen 0 (2021) and contributed to novels and manga adaptations tied to Attack on Titan.
