しろながすくじらじゃなかったです
白長須鯨じゃなかったです
shironagasukujirajanakattadesu

Noun
Desu Copula

The polite, past negative form of しろながすくじら

1. Was not a beluga whale.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana