皇宮 こうぐう警察 けいさつじゃなかったです
kōgūkeisatsujanakattadesu

Noun
Desu Copula

The polite, past negative form of 皇宮警察

1. Wasn't Imperial Palace police.; Wasn't a member of the Imperial Palace police.

Past/Perfective
Negative
Polite
Casual Register