Behind this decision of the Imperial Court, there was a situation where the Imperial Court had no time to deal with affairs in the Oshu region because the political strife between the Minamoto clan and the Taira clan had arisen inside the Imperial Court.
その後、朝廷内部で源氏と平氏の間で政争が起きたために奥州にかかわっている余裕が無かったと言う事情も有った。