Kizuku Watanabe is a manga artist from Kumamoto Prefecture. He debuted in Weekly Shonen Jump in 2010 with the fairy-tale parody Marchen Prince Grimm. From 2015 to 2019, Watanabe planned and wrote Assassination Classroom: Koro Sensei Quest!, the official spin-off of the best-selling Assassination Classroom. In 2024, he returned with his latest manga, Kaiju No. 8: Relax. Naoya Matsumoto published his first serialized series, Neko Wappa!, in Weekly Shonen Jump in 2009. His next series, Pochi Kuro, began serialization in Shonen Jump+ in 2014. Kaiju No. 8 is his follow-up series.