重厚じゅうこう長大ちょうだい産業さんぎょうではありませんでした
jūkōchōdaisangyōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 重厚長大産業

1. Was not a heavy, large-scale industry.; Was not a substantial, major industry.

Past/Perfective
Negative
Polite
Formal Register