After the death of Kenshin, Kagekatsu UESUGI, who was a son of Masakage and had been adopted by Kenshin, won the Otate War and became the lord of Kasugayama-jo Castle.
謙信の死後、政景の子で謙信の養子となっていた上杉景勝が御館の乱を制して春日山城主になった。