During the fourth month, Togame and Shichika arrive at a village near Sou in the eastern Yamaguchi prefecture. They seek Hakuhei Sabi, one of Japan’s strongest swordsmen who possesses the thin and frail sword, Hakutō Hari. Sabi sends a challenge to Shichika to meet on Ganryū island and duel for their swords. Meanwhile, Shichika's sister, Nanami, is attacked by the Maniwa Ninja insect squad in an attempted kidnapping...