Fūma no Kojirō (風魔の小次郎, "Kojiro of the Fuma Clan") is a Japanese manga series written and illustrated by Masami Kurumada.

A sequel entitled Yagyū Ansatsuchō (柳生暗殺帖, "Yagyu's Murder Book"), written and illustrated by Satoshi Yuri, was published in Akita Shoten's Champion Red between 2003 and 2006.

In October 2007, a live-action television drama adaptation began airing on Tokyo MX, starring Ryouta Murai in the lead role of Kojiro.

The leader of the Fuma sent Kojiro to Hakuo, there he faces the notorious Yasha clan who fights for Seishikan led by Musashi Asuka.

[6][7][8] A short series, titled Fūma no Kojirō: Jo no Maki (風魔の小次郎 序の巻) was serialized in Champion Red from August 19 to October 19, 2019.

[9][10] Another series, titled Fūma no Kojirō Gaiden: Asuka Mumeicho (風魔の小次郎 外伝 飛鳥無明帖), started in the same magazine on August 19, 2022.