日米 にちべい修好 しゅうこう通商 つうしょう条約 じょうやくであれば
ni chibe ishū kō tsūshōjōyakudeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 日米修好通商条約

1. If the Japan-US Treaty of Amity and Commerce…; Were the Japan-US Treaty of Amity and Commerce…

Ba Conditional