ACCA: 13-Territory Inspection Dept. is a Japanese manga series written and illustrated by Natsume Ono. It follows Jean Otus, a calm and observant inspector for the ACCA organization, as he travels through the kingdom’s 13 districts to monitor local branches and uncover political tensions. The story blends mystery, intrigue, and understated character drama, with a stylish, muted atmosphere. It was adapted into an anime television series in 2017.