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Kaiju No. 8 S1E23 — Second Wave

8.3

Kaiju No. 8•Season 1•Episode 23

Second Wave

8.3/10 · 14 votesSep 27, 202524 min

Ranked #8 of 23 in Season 1•+0.2 vs season avg

Just as the Defense Force begins turning the tide against the widespread kaiju attacks, five powerful numbered kaiju appear before its strongest fighters. With the situation rapidly deteriorating, Kafka is forced to decide whether he can continue waiting for Kaiju No. 9 or must enter

Directed byRyo Kodama, Jun Soga, Shota Hamada

Written byYuichiro Kido

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Seasons1

Cast5

Masaya Fukunishi

Masaya Fukunishi

Kafka Hibino / Kaiju No. 8 (voice)

Asami Seto

Asami Seto

Mina Ashiro (voice)

Wataru Katoh

Wataru Katoh

Reno Ichikawa (voice)

Fairouz Ai

Fairouz Ai

Kikoru Shinomiya (voice)

Kengo Kawanishi

Kengo Kawanishi

Soshiro Hoshina (voice)

Crew12

M

Mai Fukuhara

Animation Director

S

Sae Fukushima

Animation Director

E

Eisuke Shirai

Animation Director

Tetsuya Nishio

Tetsuya Nishio

Supervising Animation Director

Shigeyuki Miya

Shigeyuki Miya

Storyboard Artist

T

Takahito Katayama

Animation Director

Y

Yuuko Sera

Animation Director

T

Takahisa Katagiri

Animation Director

Y

Yukiko Watabe

Animation Director

H

Haruo Okuno

Animation Director

Aurora Aksnes

Aurora Aksnes

Theme Song Performance

Yuichiro Kido

Yuichiro Kido

Series Composition

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Episode Summary

"Second Wave" is episode 23 of Kaiju No. 8 season 1. It scored 8.3/10 from 14 votes, ranking #8 of 23 episodes this season (season average 8.1). Directed by Ryo Kodama, Jun Soga, Shota Hamada and written by Yuichiro Kido, it aired on September 27, 2025.

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