旧幕 きゅうばく時代 じだいじゃなかったです
kyūbakujidaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 旧幕時代

1. It wasn't the old shogunate era.; It wasn't the Edo period.

Past/Perfective
Negative
Polite
Casual Register