けかきじゃなかったです
毛牡蠣じゃなかったです
ke kakijanakattadesu

Noun
Desu Copula

The polite, past negative form of けがき

1. Wasn't a hairy oyster.; Wasn't a rough oyster.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana