Hidehira had refused Yoritomo's demand for the surrender of Yoshitsune, but Yasuhira, a son of Hidehira, could not refuse the demand any longer after Hidehira's death.
秀衡は頼朝からの引渡要求を拒んできたが秀衡の死後、息子の藤原泰衡は頼朝の要求を拒みきれなかった。