みなみまぐろじゃなかったです
南鮪じゃなかったです
minamimagurojanakattadesu

Noun
Desu Copula

The polite, past negative form of みなみまぐろ

1. It wasn't southern bluefin tuna.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana