Birth of the 10th! Kamen Riders All Together!! (10号誕生!仮面ライダー全員集合!!, Jūgō Tanjō! Kamen Raidā Zen'in Shūgō!!) is a Japanese television special in Toei Company's Kamen Rider Series. It is the eighth entry of the Showa-era and premiered on January 3, 1984. The special follows Ryo Murasame, the tenth person to don the Kamen Rider title, as he fights against the Badan Empire who killed his sister.