あかねずみでわありませんでした
赤鼠ではありませんでした
akanezumidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of あかねずみ

1. Was not a red mouse.; Was not a reddish-brown rat.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana