Voice actor Shunsuke Takeuchi has been cast as the adult voice of the protagonist Juzo Ogami for the upcoming TV anime adaptation of Kill Blue.  

©藤巻忠俊／集英社・「キルアオ」製作委員会

Hiro Kaburagi (Great Pretender, Kimi ni Todoke Season 1 and 2) is directing the anime series, with Miho Daidoji as character designer. DMM.com’s CUE is in charge of the animation production for the series. 

The original action comedy manga series by Tadatoshi Fujimaki was serialized in Shueisha’s Weekly Shonen Jump from April 17, 2023 to September 1, 2025. Eleven tankobon volumes have been released in Japan as of September 2025, with a 12th volume set to be released on November 4, 2025 and a 13th volume on December 4, 2025. VIZ Media licensed the manga for English release, and is also being published digitally on Manga Plus. 

The manga ranked seventh in Zenkoku Shotenin Eranda Osusume Comic 2024.

©Tadatoshi Fujimaki/SHUEISHA, “Kill Blue” Production Committee

The main synopsis for the Kill Blue TV anime series is described as:  

A legendary assassin at 39. Starting over… as a middle schooler. 

Juzo Ogami is a legendary hitman who has never failed an assignment, no matter how  impossible. One day, after wiping out a powerful organization, he is stung by a mysterious wasp and collapses. When he wakes up, the fearsome 39-year-old assassin has been transformed into a 13-year-old boy! Before he can even process what happened, his boss delivers a new order: “In that body, infiltrate a middle school.” What awaits him is an unexpected school life filled with colorful classmates, youthful chaos, and looming danger. Can Juzo ever return to his original form? Or will the assassins closing in on him end his second life before it even begins!? 

Sources: Kill Blue Official Twitter (2), press release