どく不可侵ふかしん条約じょうやくじゃないです
dokusofukashinjōyakujanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 独ソ不可侵条約

1. It's not the Soviet-Japanese Non-aggression Pact.

Negative
Polite
Casual Register