Because he was a hero with great physical strength, it has been told that he was a son of female warrior, Tomoe Gozen who held great physical strength and displayed remarkable deeds in gunki monogatari (martial tales) such as "Heike Monogatari" (The tale of the Heike).
彼は、大力の勇者であったため、『平家物語』などの軍記物語で活躍した大力の女武者巴御前の子と伝わる。