Start Fighting Back! Luffy and the Akazaya Samurai! - S21.E948

Raizo retrieves the keys to Kawamatsu's cell as well as his sword. The ninja later gives them to him, and Kawamatsu frees himself. After Raizo, Kawamatsu, and Kikunojo reunite, they joined up with Luffy and Hyogoro in fighting the Beasts Pirates. However, the Beasts Pirates continue infecting prisoners with Excite Bullets.