かく 拡散 かくさん条約 じょうやくじゃなかったです
kaku fukakusan jōyakujanakattadesu

Noun
Desu Copula

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

1. Was not the Non-Proliferation Treaty.

Past/Perfective
Negative
Polite
Casual Register