通商 つうしょう航海 こうかい条約 じょうやくでしょう
tsūshōkōkaijōyakudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 通商航海条約

1. Probably a treaty regarding trade and navigation.

Polite
Presumptive
Conjecture