Wide-spread concepts of the Bankoku Koho gave a reason that restoration government of the Satsuma and Choshu Domains inherited the unequal treaties which were concluded between foreign countries and the Edo bakufu and also a ground to persuade people who supported Joi-ron (equal to justification of Kaikoku-ron) (Yoshino 1927, Osatake 1932, Yamamuro 2001).
こうした万国公法の内容が広く知られるようになったことは、薩摩・長州ら維新政府側が、江戸幕府が締結した不平等条約を継承することへの弁明や攘夷論者の説得（＝開国論の正当化）に根拠を与えた（吉野1927、尾佐竹1932、山室2001）。