Arrival of "Bankoku Koho" resulted in change of diplomatic policy of Satcho (the Satsuma and Choshu Domains) and diplomatic policy was changed from Joi-ron (principle of excluding foreigners) to Kaikoku-ron (theory of opening of a country to the world).
また薩長が攘夷論から開国論へと対外政策を転換する契機ともなった。