日米にちべい安全あんぜん保障ほしょう条約じょうやくでしょう
ni chi bēanzenhoshōjōyakudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 日米安全保障条約

1. Probably the Japan-U.S. Security Treaty.

Polite
Presumptive
Conjecture