In an unprecedented move, the bakufu reported the state of affairs to the Imperial Court, where the matter was discussed until a treaty between the United States of America and the Empire of Japan was concluded which opened ports at Shimoda and Hakodate, loosened a ban on production of large ships as of September and lifted the ban on foreign voyage by October.
先例を破って朝廷に事態を報告、対策を協議して日米和親条約を結び、下田港と函館港を開港し、9月には大船建造の禁を緩和、10月には海外渡航が解禁される。