With respect to the Uesugi clan, after Kenshin UESUGI's death, his adopted son, Kagekatsu UESUGI became the family head and the strong troops that harassed Shingen TAKEDA by fiercely attacking the Kanto Region and Echigo Province had been weakened by the Otate no Ran (Otate disturbance).
また上杉氏は上杉謙信亡き後、養子縁組・上杉景勝の代であり、かつて関東・越後国から猛攻をかけ武田信玄を苦しめた強力な軍団は御館の乱で勢いを弱めていた。