蝦夷 えぞ上溝 うわみず さくらであれば
ezōwa mizu sakuradeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 蝦夷上溝桜

1. If it were Ezo-kami-zumi cherry…; If the Ezo-kami-zumi cherry were…

Ba Conditional