However, the keeper of Komoro-jo Castle Nobutsune SHIMOSONE rebelled against Nobutoyo and fired the secondary enclosure of the caslte; Nobutoyo committed suicide with his legitimate son, his birth mother, and his vassals.
しかし城代の下曽根信恒に叛かれ、二の丸に火を掛けられ嫡男や生母、家臣とともに自害した。