ちくしかもじゃなかったです
筑紫鴨じゃなかったです
chikushikamojanakattadesu

Noun
Desu Copula

The polite, past negative form of つくしがも

1. It wasn't a Tsukushi duck.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana