Hiroshi Seko
Description
Hiroshi Seko is a Japanese anime screenwriter and series composer known for his extensive work on major anime productions and his role as an original creator for the Attack on Titan: Lost Girls project. Born in 1981 in Nagoya, Japan, Seko began his career in the anime industry not as a writer but in production roles, working as a production manager at the studio Gonzo and later at Gainax. His transition to scripting began around 2010, with his earliest screenwriting credits including work on the Gainax productions Panty & Stocking with Garterbelt and Gurren Lagann Parallel Works 2.
Seko gained prominence as a screenwriter for the first season of the Attack on Titan television anime in 2013, where he contributed scripts for multiple episodes. His involvement with the franchise deepened when he became the credited writer for the visual novel segments Lost in the Cruel World and Wall Sina, Goodbye, which were released alongside the anime's Blu-ray volumes in 2013. These two stories formed the basis for the novel Attack on Titan: Lost Girls, which Seko wrote and which was published by Kodansha in December 2014. The novel served as the source material for a two-volume manga adaptation illustrated by Ryosuke Fuji, serialized in Bessatsu Shōnen Magazine from August 2015 to May 2016, as well as a three-part original animation DVD released between December 2017 and August 2018, for which Seko also provided the screenplay. This trajectory demonstrates a pattern in his career, moving from episode writing on existing anime to originating new stories within established franchises.
Beyond his work on Attack on Titan, Seko has built a career as a prolific and in-demand screenwriter, frequently taking on the role of series composition—the head writer responsible for the overall narrative structure—for major anime adaptations. Following his work on Attack on Titan, he served as series composer for Seraph of the End in 2015, which marked a significant step in his career. He has since held series composition credits on a wide array of high-profile titles, including Ajin: Demi-Human, Mob Psycho 100, Inuyashiki, Banana Fish, Vinland Saga, Dorohedoro, Deca-Dence, Jujutsu Kaisen, Chainsaw Man, Zom 100: Bucket List of the Dead, Wind Breaker, and Dandadan. His work often involves adapting popular manga series for the screen, a task that requires balancing fidelity to the source material with the narrative demands of an animated format. His credits also extend to films, where he has written screenplays for features such as The Empire of Corpses, the live-action Ajin: Demi-Human film, Jujutsu Kaisen 0, and the Chainsaw Man – The Movie: Reze Arc.
His artistic identity is closely linked to his frequent collaborations with animation studios such as Wit Studio and MAPPA, for which he has worked on numerous series across various genres, particularly action, supernatural fantasy, and science fiction. His career has evolved from writing individual episodes to overseeing the entire script for a series, making him a significant creative figure in contemporary anime production. His work has been associated with several critically acclaimed and commercially successful titles, with series like Jujutsu Kaisen and Vinland Saga receiving accolades at the Crunchyroll Anime Awards.
Seko gained prominence as a screenwriter for the first season of the Attack on Titan television anime in 2013, where he contributed scripts for multiple episodes. His involvement with the franchise deepened when he became the credited writer for the visual novel segments Lost in the Cruel World and Wall Sina, Goodbye, which were released alongside the anime's Blu-ray volumes in 2013. These two stories formed the basis for the novel Attack on Titan: Lost Girls, which Seko wrote and which was published by Kodansha in December 2014. The novel served as the source material for a two-volume manga adaptation illustrated by Ryosuke Fuji, serialized in Bessatsu Shōnen Magazine from August 2015 to May 2016, as well as a three-part original animation DVD released between December 2017 and August 2018, for which Seko also provided the screenplay. This trajectory demonstrates a pattern in his career, moving from episode writing on existing anime to originating new stories within established franchises.
Beyond his work on Attack on Titan, Seko has built a career as a prolific and in-demand screenwriter, frequently taking on the role of series composition—the head writer responsible for the overall narrative structure—for major anime adaptations. Following his work on Attack on Titan, he served as series composer for Seraph of the End in 2015, which marked a significant step in his career. He has since held series composition credits on a wide array of high-profile titles, including Ajin: Demi-Human, Mob Psycho 100, Inuyashiki, Banana Fish, Vinland Saga, Dorohedoro, Deca-Dence, Jujutsu Kaisen, Chainsaw Man, Zom 100: Bucket List of the Dead, Wind Breaker, and Dandadan. His work often involves adapting popular manga series for the screen, a task that requires balancing fidelity to the source material with the narrative demands of an animated format. His credits also extend to films, where he has written screenplays for features such as The Empire of Corpses, the live-action Ajin: Demi-Human film, Jujutsu Kaisen 0, and the Chainsaw Man – The Movie: Reze Arc.
His artistic identity is closely linked to his frequent collaborations with animation studios such as Wit Studio and MAPPA, for which he has worked on numerous series across various genres, particularly action, supernatural fantasy, and science fiction. His career has evolved from writing individual episodes to overseeing the entire script for a series, making him a significant creative figure in contemporary anime production. His work has been associated with several critically acclaimed and commercially successful titles, with series like Jujutsu Kaisen and Vinland Saga receiving accolades at the Crunchyroll Anime Awards.
Works
- Topics: Anime overview
- Topics: Manga overview