式年 しきねん遷宮 せんぐう さいであれば
shikinensengūsaideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 式年遷宮祭

1. If it is the Shiki-nen Senkyū-sai festival; If the Shiki-nen Senkyū-sai festival were to be held

Ba Conditional