ばあえぼしかいじゃなかったです
姥烏帽子貝じゃなかったです
bā eboshikaijanakattadesu

Noun
Desu Copula

The polite, past negative form of おばえぼしがい

1. Wasn't a *ubakazura* shell.; Wasn't a type of old-fashioned hat.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana