びわこおうなまずであれば
琵琶湖大鯰であれば
biwako ō namazudeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of びわこおおなまず

1. If it were Lake Biwa's giant catfish; Were Lake Biwa's giant catfish to be

Ba Conditional
Usually Written in Kana