However, during Domanmaru's childhood, his step grandfather Kenshin UESUGI had died, which triggered the eruption of the Otate no ran rebellion which was an intra-clan war fought between Kagetora and Kagekatsu for succession of the position of head of the clan.
しかし、彼がまだ子供で育ち盛りの時に、義祖父・上杉謙信が死去してしまい景虎と景勝の間で家督争い・御館の乱が発生してしまう。