Nasu no Yoichi was a samurai who fought alongside the Minamoto clan in the Genpei War. He is particularly famous for his actions at the Battle of Yashima in 1185. According to the Heike Monogatari, the enemy Taira placed a fan atop a pole on one of their ships, daring the Minamoto warriors to shoot it off. Sitting atop his mount in the waves, his target atop the ship rocking as well, Nasu nevertheless shot it down with only one shot.