Kaiju No. 8 (Japanese: 怪獣8号, Hepburn: Kaijū 8-gou), also called Monster #8, is a hit manga series by Naoya Matsumoto. It has been serialized on Shueisha’s Shonen Jump+ platform since July 2020. By March 2022, the series had six tankōbon volumes, and Viz Media licensed it for English release in North America.

The story follows Kafka Hibino, a man who gains the ability to transform into a kaiju. He joins the Defense Force, balancing his human side with his monstrous powers to fight against powerful enemies. Kaiju No. 8 combines action, humor, and moments of warmth, exploring resilience and the drive to overcome one’s limits. Matsumoto’s art and character depth have made the series a standout for fans who love an exciting twist on monster battles.