天皇 てんのう皇后 こうごう りょう陛下 へいかだったら
tennōkōgo uryōe ikadattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 天皇皇后両陛下

1. If/When Their Majesties the Emperor and Empress…; If Their Majesties the Emperor and Empress were…

Tara Conditional