蝦夷 えぞ赤蛙 あかがえるじゃなかったです
ezoakagaerujanakattadesu

Noun
Desu Copula

The polite, past negative form of 蝦夷赤蛙

1. Wasn't a Hokkaido frog.; Wasn't a Ezo frog.

Past/Perfective
Negative
Polite
Casual Register