The date and the place of the execution of Tadamune and his attitude at that time are unclear because there are several stories about them, but according to "Horyakukanki" (A History Book of the 14th century in Japan), Tadamune was beheaded in Mino Province in October 1190 when Yoritomo went to the capital (Kyoto).
処刑の年代や場所、最期の様子については諸説があって判然としないが、『保暦間記』によると建久元年10月の頼朝の上洛の際に、美濃で斬首されたことになっている。