ざがしらむしじゃありませんでした
座頭虫じゃありませんでした
zaga shiramushija arimasendeshita

Noun
Desu Copula

The polite, past negative form of ざとうむし

1. Was not a loafer.; Was not idle.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana