Soga clan
In May 1193, when Yoritomo held a grand hunt on Mount Fuji, an incident occurred in which two brothers of the Soga clan killed Kudo Suketsune, an enemy of their father. A rumor spread that Yoritomo had been killed. Yoritomo's wife, Hōjō Masako, was worried, but Noriyori comforted her, assuring her that even if Yoritomo were killed, he would be there for her and for the clan. These words caused Yoritomo to doubt his brother, who confined Noriyori to Izu Province.