かやねずみじゃありませんでした
萱鼠じゃありませんでした
kayanezumijārimasendeshita

Noun
Desu Copula

The polite, past negative form of かやねずみ

1. Was not a vole.; Was not a daylily vole.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana