えぞむささびじゃなかったです
蝦夷鼯鼠じゃなかったです
ezomusasabijanakattadesu

Noun
Desu Copula

The polite, past negative form of えぞももんが

1. Wasn't a flying squirrel.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana