Fūma no Kojirō: Yagyū Ansatsuchō

Years after Kojirou helped save Hakuo Academy from closing down, the school has still become a shell of its former glory. Renya Yagyu, younger brother of Ranko (the woman who brought the Fuma to Hakuo), now decides to go after Kojirou in order to retrieve Furin Kazan, the Sacred Sword Ranko gave to Kojirou. At the same time, a mysterious group known as Karma has its eyes set on the Fuma in order to unlock the seal on its deity, Indra. Kojirou not only has to protect what's left of his clan, but also prove that he worthy of becoming its new leader.