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Kaiju No. 8 S1E18 — Compatible User
7.7
Kaiju No. 8•Season 1•Episode 18

Compatible User

7.7/10 · 15 votesAug 23, 202524 min

Ranked #17 of 23 in Season 1•−0.4 vs season avg

Discussion

Kaiju No. 10 awakens in Defense Force custody and makes an unexpected proposal to Hoshina. Meanwhile, the division captains gather to discuss how to confront the growing threat of Kaiju No. 9, leading Hoshina to present a surprising possibility that could reshape their strategy.

Directed byNaoki Matsuura
Written byYuichiro Kido
Previous episodeE17 · I Want to Be StrongNext episodeE19 · Wall
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Seasons1

All1

Season 1 Episodes23

The Man Who Became a Kaiju stillE1 8.1

The Man Who Became a Kaiju

The Kaiju Who Defeats Kaiju stillE2 8.1

The Kaiju Who Defeats Kaiju

Revenge Match stillE3 7.8

Revenge Match

Fortitude 9.8 stillE4 8.8

Fortitude 9.8

Joining Up! stillE5 7.6

Joining Up!

Sagamihara Neutralization Operation at Daybreak stillE6 8.1

Sagamihara Neutralization Operation at Daybreak

Kaiju No. 9 stillE7 8.9

Kaiju No. 9

Welcome to the Defense Force stillE8 8.1

Welcome to the Defense Force

Raid on Tachikawa Base stillE9 8.9

Raid on Tachikawa Base

Secret Revealed stillE10 9.4

Secret Revealed

Kaiju No. 8 Captured stillE11 9.0

Kaiju No. 8 Captured

Kafka Hibino stillE12 8.7

Kafka Hibino

Kaiju Weapon stillE13 7.5

Kaiju Weapon

The Next Generation's Trial stillE14 7.5

The Next Generation's Trial

The Strongest Division stillE15 7.8

The Strongest Division

The Man Called Isao Shinomiya stillE16 8.3

The Man Called Isao Shinomiya

I Want to Be Strong stillE17 7.8

I Want to Be Strong

Compatible User stillE18 7.7Now viewing

Compatible User

Wall stillE19 7.1

Wall

Destiny stillE20 7.1

Destiny

Omen stillE21 7.2

Omen

Cataclysms stillE22 8.0

Cataclysms

Second Wave stillE23 8.3

Second Wave

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

Tetsuya Nishio

Tetsuya Nishio

Supervising Animation Director

Shigeyuki Miya

Shigeyuki Miya

Storyboard Artist

Y

Yuuko Sera

Animation Director

Aurora Aksnes

Aurora Aksnes

Theme Song Performance

Yuichiro Kido

Yuichiro Kido

Series Composition

Yuichiro Kido

Yuichiro Kido

Writer

S

Satoru Nakamura

Animation Director

J

Jiang Hangcen

Animation Director

N

Naoki Matsuura

Director

H

Hisashi Kagawa

Animation Director

A

Akiko Taniguchi

Animation Director

Y

Yousuke Kobuchi

Animation Director

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Episode Summary

"Compatible User" is episode 18 of Kaiju No. 8 season 1. It scored 7.7/10 from 15 votes, ranking #17 of 23 episodes this season (season average 8.1). Directed by Naoki Matsuura and written by Yuichiro Kido, it aired on August 23, 2025.

Next: E19 · WallBest of Season 1