The factors that led to Yukiie's defeat were the outbreak of the Great Famine of Yowa and Yoritomo's decision to suspend his plan to go to Kyoto and instead concentrate on his operations in Togoku (eastern part of Japan).
それは、頼朝が上洛を取りやめ東国経営に専念した事と、養和の大飢饉の影響である。