かたくちいわしでわありませんでした
片口鰯ではありませんでした
katakuchiiwashidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of かたくちいわし

1. Was not a young horse mackerel.; Was not a small horse mackerel.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana