相手 あいて かた当事 とうじ しゃではありませんでした
aiteka tatōjishadewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 相手方当事者

1. Was not the opposing party.; Was not the other party.; Was not the plaintiff/defendant.

Past/Perfective
Negative
Polite
Formal Register