That is to say, In June of that year, just after the assuming the position of Tairo, Naosuke II, without permission of the emperor, allowed Kiyonao INOUE and Tadanari IWASE to conclude the Treaty of Amity and Commerce between the United States and Japan with Harris.
すなわち大老就任直後の6月、勅許の降りないまま井上清直・岩瀬忠震らにハリスとの間で日米修好通商条約を締結させた。