Yoshizumi MIURA was Yoshihira's uncle while Hidetsune KAZUSANOSUKE was the heir of the Kazusa clan, who backed Yoshitomo, having adopted him as their liege lord, and the Yamanouchi-Sudo clan had been vassals of the Minamoto for many generations, meaning that all of these warriors had close personal relationships with Yoshitomo.
三浦義澄は義平の叔父、上総介広常は義朝を養君として擁立していた上総氏の嫡子、山内首藤氏は源氏譜代の家人であり、いずれも義朝と個人的に深い関係を有する武士である。