深海 しんかい漁業 ぎょぎょうじゃなかったです
shinkaigyogyōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 深海漁業

1. Deep-sea fishing wasn't.; It wasn't deep-sea fishing.

Past/Perfective
Negative
Polite
Casual Register