けながねずみじゃなかったです
毛長鼠じゃなかったです
kenaganezumijanakattadesu

Noun
Desu Copula

The polite, past negative form of けながねずみ

1. Wasn't a long-haired mouse.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana