Although Masayuki recommended going to Iwabitsu-jo Castle, which was an impregnable fortress, Nobushige insisted on going to Iwadonoyama-jo Castle on the grounds that Iwabitsu-jo Castle was too far and that the snow was too deep.
昌幸は岩櫃城が要害であることを説明して岩櫃城行きを勧めたが、信茂が、岩櫃城までは遠路に加えて雪が深いことを理由に岩殿城行きを力説した。