弘仁 こうにん貞観 じょうがん時代 じだいなら
kō ninjōganjidainara

Noun
Da Copula

The "-nara" conditional form ("if/when…") of 弘仁貞観時代

1. If/When the Kōnin-Jōgan period…; During the Kōnin-Jōgan period…

Nara Conditional