Items treated in "Bankoku Koho" covers a wide range of subjects such as subjects and objects of international law, source of law, relation between international law and domestic law, relation between treaties, diplomacy and consular, explanation of territory and waters as a scope to which sovereignty of a nation covers, rules for treating international conflict and rules for peace talk, and neutrality of third party countries during war and, therefore, it can be called a book of systematic commentaries for international law.
『万国公法』で扱われる内容は、国際法の主体及び客体、法の淵源、国際法と各国内の法との関係、条約・外交と領事の関係、主権の及ぶ範囲としての領土や領海の説明、国際紛争が発生した際のルール及び和平交渉のルール、戦時における第三国の中立のあり方など多岐にわたり、国際法をまさに体系的に解説したものといって良い。