仮想 かそう通貨 つうか交換 こうかん しょではありませんでした
ka sō tsūkakōkan shodewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 仮想通貨交換所

1. Was not a cryptocurrency exchange.; Was not an exchange for virtual currency.

Past/Perfective
Negative
Polite
Formal Register