The short series will have four episodes.
During Jump Festa 2026, it was announced that the “Kaiju No. 8” anime will receive an original short anime spin-off titled “Narumi’s Week at Work”. In a new trailer, it has been confirmed that the four-episode series will air on 5 September, 2026. Crunchyroll will stream the anime as it airs.
Kaiju No. 8: Narumi’s Week at Work
Premiere date: 5 September, 2026
Animation studio: Production I.G.
Streaming platform: Crunchyroll
What do we know about Kaiju No. 8: Narumi’s Week at Work short anime so far?
The anime is based on Kizuku Watanabe’s spinoff manga Kaiju No. 8 RELAX, based on the original Kaiju No. 8 manga by Naoya Matsumoto. Watanabe is also overseeing the anime project.
Shigeyuki Miya returns from the main series to direct the anime at Production I.G. Other returning staff members include character designer and chief animation director Tetsuya Nishio and music composer Yūta Bandō.
Additional staff members include:
- Kaiju Designs: Mahiro Maeda
- Art Director: Shinji Kimura
- Colour Key Artist: Izumi Hirose
- Compositing Director of Photography: Eiji Arai
- Sound Director: Fumiyuki Go
- Kaiju Designs & Design Works: Khara
- 3D Director: Hayato Aragaki
- Editor: Yuka Yamajō
Kōki Uchiyama is returning from the main anime to voice the titular Gen Narumi, the captain of the First Division of the Defense Force.
The story of the short anime will focus on Gen Narumi, Japan’s strongest anti-kaiju combatant, whose ego and temper match his talents. He usually avoids meetings, office work, and holes up in his dirty room to play games during downtime. But sometimes, even the strongest warrior faces unexpected challenges from his coworkers and juniors at the JAKDF. How will Narumi handle his less-than peaceful week at work?
The original Kaiju No. 8 anime’s production team also revealed a new visual of protagonist Kafka Hibino for his birthday:
What is Kaiju No. 8 about?
The Kaiju No. 8 anime series is based on the manga of the same name by Naoya Matsumoto. The series began publishing in July 2020 in Shueisha’s Shōnen Jump+ app, and ended in July 2025. The anime’s first season came out in 2024, with a second following in 2025. In July 2025, a short special episode titled ‘Hoshina’s Day Off’ also came out.
Viz Media publishes the original manga series and describes the story as:
Kafka hopes to one day keep his pact with his childhood friend Mina to join the Japan Defense Force and fight by her side. But while she’s out neutralizing kaiju as Third Division captain, Kafka is stuck cleaning up the aftermath of her battles. When a sudden rule change makes Kafka eligible for the Defense Force, he decides to try out for the squad once more. There’s just one problem—he’s made the Defense Force’s neutralization list under the code name Kaiju No. 8.