このしろじゃありませんでした
鮗じゃありませんでした
konoshirojārimasendeshita

Noun
Desu Copula

The polite, past negative form of このしろ

1. Was not a hairtail.; Was not (something related to hairtail).

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana