But when Hidehira died, his son FUJIWARA no Yasuhira violated the will of his father out of fear of the power of Yoritomo and attacked Yoshitsune and his entourage at Koromogawa no Tachi (residence of the Oshu-Fujiwara clan).
だが、秀衡が死ぬと、子の藤原泰衡は頼朝の威を恐れて、父の遺言を破り、義経主従を衣川館に襲った。