たいはくびそだったら
大白檜曽だったら
taihaku bi sodattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of おおしらびそ

1. If/when Ōshiro Hiso were…; If Ōshiro Hiso were to…

Tara Conditional
Usually Written in Kana