うぐいすかいじゃないです
鶯貝じゃないです
uguisukaijanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of うぐいすがい

1. It's not a sparrow shell.; It's not a wren shell.

Negative
Polite
Casual Register
Usually Written in Kana