かく 拡散 かくさん条約 じょうやくではありませんでした
kaku fukakusan jōyakudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 核不拡散条約

1. Was not the Nuclear Non-Proliferation Treaty.

Past/Perfective
Negative
Polite
Formal Register