The report of Yoritoshi to the Imperial Court mentioned that his troops had reached to 'Ezogawa Keshima,' although the location of this 'Ezogawa Keshima' has not been clarified today whether 'Ezogawa Keshima' was located in Ezo (Hokkaido Island) or the in the northern part of Honshu Island; it is also considered that Yoritoshi exaggerated the military gains and other results in his report.
なお、この合戦で「衣曾別嶋」まで遠征を行ったと頼俊が報告しているが、この「衣曾別嶋」が蝦夷（北海道）であるという説と本州北部であるという説、頼俊が戦果を誇大報告したという説などがある。