せん縄文 じょうもん時代 じだいじゃありませんでした
senjōmonji daija arimasendeshita

Noun
Desu Copula

The polite, past negative form of 先縄文時代

1. Was not the Early Jomon period.; Wasn't the Early Jomon period.

Past/Perfective
Negative
Polite
Terminal Form