先進 せんしん工業 こうぎょう こくじゃなかったです
senshinkōgyō koku ja nakattadesu

Noun
Desu Copula

The polite, past negative form of 先進工業国

1. Was not an advanced industrial nation.; Wasn't a leading industrial country.

Past/Perfective
Negative
Polite
Casual Register