下瀬 しもせ火薬 かやくじゃありませんでした
shimo se kayakujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 下瀬火薬

1. It was not a lower-class firework.; It wasn't a cheap firework.

Past/Perfective
Negative
Polite
Terminal Form