かやねずみでわありませんでした
萱鼠ではありませんでした
kayanezumidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of かやねずみ

1. Was not a daylily vole.; Was not a vole of the daylily family.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana