貝殻 かいがら じょう だん くちじゃなかったです
kaigarajōdan kuchi ja nakattadesu

Noun
Desu Copula

The polite, past negative form of 貝殻状断口

1. Wasn't shell-like fracture.; Wasn't a shell-shaped break.

Past/Perfective
Negative
Polite
Casual Register