いしだたみかいじゃありません
石畳貝じゃありません
ishidatamikaijārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of いしだたみがい

1. It is not a cobblestone shell.; It is not that kind.

Negative
Polite
Terminal Form
Usually Written in Kana