日米 にちべい和親 わしん条約 じょうやくでしょう
ni chibe iwashin jōyakudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 日米和親条約

1. Probably the Treaty of Amity and Commerce between Japan and the U.S.

Polite
Presumptive
Conjecture