A half year after Takauji passed away, in 1358, Yoshitoki and his 13 servants were murdered premeditatedly at Yaguchi no Watashi (Yaguchi Ferry) of Tama-gawa River by Takesawa, who was the Ukyo no Suke (Assistant Master of the Western Capital Offices), and Edo clan members sent by Motouji ASHIKAGA, who was a child of Takauji and was the Kamakura kubo (Governor general of the Kanto region), and Kunikiyo HATAKEYAMA, who was the Kanto Kanrei (a shogunal deputy for the Kanto region).
尊氏が没した半年後の1358年（正平(日本)13年/延文3年）、尊氏の子で鎌倉公方の足利基氏と関東管領の畠山国清によって送りこまれた竹沢右京亮と江戸氏により、義興と主従13人は、多摩川の矢口渡で謀殺される。