Fūma no Kojirō (風魔の小次郎?, lit. "Kojirō of the Fūma") is a manga series by Japanese author Masami Kurumada, later adapted to anime. It tells the story of sword legends and rivalty between ninja clans. The main character Kojirō is a young boy who is a member of the Fūma clan. On June 1, 1989, an OVA was released featuring animation character designs by Michi Himeno and Shingo Araki (both of whom also worked on the respective anime adaptations of Kurumada's other manga works; Ring ni Kakero, Saint Seiya and B't X.
In 2003, Masami Kurumada authored an additional short story titled Fūma no Kojirō: Ryūsei Ansatsuchō.
Hakuō Academy used to be a prestigious high school, and famous for martial arts. However, because its rival school Seishikan has been cowardly luring its superior students, Hakuō was going to decline. In order to recover from the situation, the acting principal of Hakuō; Himeko Hōjō, sends Ranko Yagyū to the Fūma village in search of the famous Fūma ninja clan for assistance. The leader of the Fūma sent Kojirō to Hakuō, there he faces the notorious Yasha clan who fights for Seishikan led by Musashi Asuka. Kojirō's comrades arrive, resuming an all-out ninja war that began five centuries ago.