たたらじゃなかったです
踏鞴じゃなかったです
tatarajanakattadesu

Noun
Desu Copula

The polite, past negative form of たたら

1. Didn't step on the bellows.; Wasn't stepping on the bellows.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana