みやまかわとんぼであれば
深山川蜻蛉であれば
miyamakawa tombodeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of みやまがわとんぼ

1. If it were a mountain stream dragonfly…; If it is a mountain stream dragonfly…

Ba Conditional
Usually Written in Kana