ごまさばじゃありませんでした
胡麻鯖じゃありませんでした
gomasabajārimasendeshita

Noun
Desu Copula

The polite, past negative form of ごまさば

1. It was not sesame mackerel.; I was not sesame mackerel.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana