日本 にっぽん文徳 もんとく天皇 てんのう実録 じつろくであれば
nippommonto kutenno uji tsurokudeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 日本文徳天皇実録

1. If the Japan Vendai-tenno Real Records are to be believed.; If the Japan Vendai-tenno Real Records were true.

Ba Conditional