朝貢 ちょうこう貿易 ぼうえきじゃありませんでした
chōkōbōekijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 朝貢貿易

1. Was not tributary trade.; Was not a tributary relationship.

Past/Perfective
Negative
Polite
Terminal Form