ぎえぞぼらじゃありませんでした
擬蝦夷法螺じゃありませんでした
giezo borajārimasendeshita

Noun
Desu Copula

The polite, past negative form of えぞぼらもどき

1. Was not a false/imitation Ezo conch.; Was not pretending to be an Ezo conch.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana