だい日本 にっぽん帝国 ていこくじゃなかったです
dainipponteikokujanakattadesu

Noun
Desu Copula

The polite, past negative form of 大日本帝国

1. Was not the Empire of Japan.; Wasn't the Empire of Japan.

Past/Perfective
Negative
Polite
Casual Register