Traditionally, it had been said that the besiegers had to be ten times as strong as the defenders; therefore, the plan to press a siege against the castle with the ratio of 1:3: would have been reckless for the Satsuma soldiers however fierce and cunning they were.
古来、攻城側は守城側の10倍は必要とされていることからすれば、いかに剽悍な薩摩兵とはいえ、1対3での包囲強襲は無謀な作戦と言える。