Although the Saito family was regarded as the supporter of the 'Oda Yamatonokami family,' Myochin sent reinforcements to Toshihiro against the order of the bakufu when Toshihiro began to attack Kiyosu-jo Castle.
斎藤家は「織田大和守家」へ寝返ったと思われたが、敏広が清洲城への攻撃を始めると、妙椿は幕命を逆らい敏広に援軍を送った。