With these treaties, Japan was made to open five ports, grant consular jurisdiction, recognize one-sided most-favored-nation treatment, and abandon tariff autonomy (later with Britain, Russia, Holland, and France), and forced out of its 200 and several decades old national isolation of the bakufu (Japanese feudal government headed by a shogun).
これにより5港の開港と領事裁判権、片務的最恵国待遇、関税自主権喪失などを認めさせ(後に英、露、蘭、仏とも)幕府の二百数十年続いた鎖国を終わらせた。