平成 へいせい研究 けんきゅう かいじゃありませんでした
heiseikenkyū kaija arimasendeshita

Noun
Desu Copula

The polite, past negative form of 平成研究会

1. Was not the Heisei Research Group.; Was not a member of the Heisei Research Group.

Past/Perfective
Negative
Polite
Terminal Form