うぐいすかいじゃなかったです
鶯貝じゃなかったです
uguisukaijanakattadesu

Noun
Desu Copula

The polite, past negative form of うぐいすがい

1. Wasn't a nightingale shell.; Wasn't a kingfisher shell.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana