‘Kaiju No. 8’ Star Shunsuke Takeuchi Cast in Upcoming Anime ‘Kill Blue’

Veteran voice actor Shunsuke Takeuchi has been cast in Kill Blue, an upcoming adaptation of the Shōnen manga of the same name. After recent roles in Fist of the North Star: Hokuto no Ken, Kaiju No. 8, and Gachiakuta, Takeuchi-san lends his voice in this new role as the adult version of Jūzō Ōgami with depth and intensity. Known for his award-winning work including other roles such as The Producer in The Idolmaster Cinderella Girls, Alexander Yamato in King of Prism, Jūza Hyōdo in A3!, and Revolver in Yu-Gi-Oh! VRAINS, this role is yet another one to add to his lengthy and prestigious career. This is also the latest adaptation of a Shōnen Jump title, so there is sure to be plenty of buzz about the anime leading up to its release in 2026.

Takeuchi has also provided a statement on the announcement of his casting:

“Jūzō has the mind of an adult but the body of a child, so at first I thought I might need to do some detective work—but it seems that’s not the case! What a relief!

I’ve often been told I seem a bit older than my age, so I feel a certain kinship with this character.

All of the characters in KILL BLUE are incredibly expressive, and I’m excited to pop in from time to time and watch over their energetic interactions.

Please look forward to KILL BLUE!”

Check out all of the full details about the show, including the teaser trailer below. Stay tuned for further updates on Kaiju United.

SERIES SYNOPSIS 

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

Jūzō Ōgami 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 Jūzō ever return to his original form? Or will the assassins closing in on him end his second life before it even begins? 

STAFF INFORMATION

Production:

• Director: Hiro Kaburagi (GREAT PRETENDER, Kimi ni Todoke)
• Character Design: Miho Daidōji (Kuroko’s Basketball, Kimi ni Todoke 3rd Season)
• Animation Production: CUE

Voice Cast:

• Shunsuke Takeuchi as Jūzō Ōgami (adult)

MANGA INFORMATION
Title: KILL BLUE 

Original Story: Tadatoshi Fujimaki (SHUEISHA / Jump Comics) 

Volumes: 11 currently available; Volume 12 releases November 4, 2025

OFFICIAL LINKS 

• Official Website: kill-blue.jp
• Official X (English): @killblue_en
• Official X (Japanese): @KILLBLUE_PR
• Official TikTok: @killblue_official

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