Kurosagi is a Japanese manga series written by Takeshi Natsuhara and illustrated by Kuromaru. It was serialized in Shogakukan's seinen manga magazine Weekly Young Sunday from November 2003 to July 2008, with its chapters collected in 20 tankōbon volumes. It was followed by Shin Kurosagi (2008, 2012), Shin Kurosagi: Kanketsu-hen (2012, 2013), and Kurosagi Sakidō: 18-sai Shinseijin Sagi Hanzan-hen (2022); the three were serialized in Weekly Big Comic Spirits. The series follows Koshiro Kurosaki, a boy who swindles only other professional swindlers known as shirosagi.