樺太からふと千島ちしま交換こうかん条約じょうやくじゃなかった
kara futo chi shimakōkanjōyakujanakatta

Noun
Da Copula

The past negative form of 樺太千島交換条約

1. It wasn't the Sakhalin-Kurile Islands Exchange Treaty.

Past/Perfective
Negative