Especially in Kazusa and Sagami, where the governor had just been changed after a coup d'etat, many bushi gathered under Yoritomo very quickly and created one big force, which Kiyomori sent under his grandson, TAIRA no Koremori to lead the attack, but they lost at the Battle of Fuji-gawa River.
特にクーデターで国司が交代した上総・相模では、頼朝の下に武士たちが瞬く間に集結して一大勢力を形成しており、清盛は孫の平維盛に追討軍を率いさせたが、富士川の戦いであえなく敗走してしまった。