In this theory, the main force of the expedition troops was assumed to be the group led by Kiyohara clan of Dewa Province, therefore the downfall of MINAMOTO no Yoritoshi did not affect the course of this war.
遠征軍の主力が出羽清原氏によると見られることから、実質上の総大将は清原貞衡で、源頼俊の失脚はそれほど影響が無かったと見る。