Kaiju No. 8 Manga: 16 Volumes, B-Side, Relax and the Novel
Kaiju No. 8 is complete in 16 VIZ paperbacks. B-Side and Relax are separate spin-off manga, and Exclusive on the Third Division is a novel.
Kaiju No. 8 is complete in English in 16 VIZ paperbacks; Vol. 16 came out September 1, 2026. That is the whole main story. VIZ also publishes two spin-off manga, B-Side and Relax, and a novel. They have their own numbering and are not part of the main run.
The main series
| Books | Dates | US list |
|---|---|---|
| Vol. 1 | December 7, 2021 | $11.99 |
| Vols. 2–15 | April 5, 2022 to March 17, 2026 | $11.99 each, except Vols. 6 and 7 at $9.99 |
| Vol. 16 (final) | September 1, 2026 | $11.99 |
All 16 come to $187.84 at list. VIZ’s series listing marks Vol. 16 “Final Volume!”, and at 292 pages it is the thickest book in the run; the others are 184 to 212. The listing we checked shows no omnibus or box set, so buy the singles. VIZ gives a 5 × 7½ inch trim and a Teen rating.
B-Side, Relax and the novel
- Kaiju No. 8: B-Side is drawn by Kentaro Hidano from a story by Naoya Matsumoto and Keiji Ando. VIZ calls Vol. 1 “this first of two volumes,” in which “Hoshina’s backstory comes to light.”
- Kaiju No. 8: Relax, by Kizuku Watanabe from Matsumoto’s original concept, follows “the top troops of the Third Division … on their days off.” VIZ’s series hub lists Relax Vol. 3.
- Kaiju No. 8: Exclusive on the Third Division is labeled “Novel” on the same hub. It is prose, not manga.
None of these fills a gap in Vols. 1 to 16. A shop listing titled “Kaiju No. 8 Vol. 2” could be the main series, B-Side or Relax, so check the ISBN.
Which to buy
- Trying it: Vol. 1. VIZ’s copy: Kafka, cleaning up after kaiju battles, tries for the Defense Force again, but “he’s made the Defense Force’s neutralization list under the code name Kaiju No. 8.”
- Finished the main series: B-Side for Hoshina, Relax for something lighter.
If you came from the anime, our Kaiju No. 8 watch order covers the seasons. The Kaiju No. 8 catalog lists all 16 ISBNs, and Kafka Hibino and Hoshina look at two of the leads (spoilers).