まつぼっくりかいじゃなかったです
松毬貝じゃなかったです
matsubokkurikaijanakattadesu

Noun
Desu Copula

The polite, past negative form of まつかさがい

1. It wasn't a pine cone.; It wasn't a cone shell.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana