In the previous battle of Sengokubori-jo Castle in Izumi Province, he could capture it in one day because of the explosion of the powder house, but his army also suffered a great deal of damage.
これに先立つ和泉千石堀城の戦いでは、城の煙硝蔵が爆発したために一日で攻略できたものの攻城側にも多大な犠牲が出ている。