みやまかわとんぼだったら
深山川蜻蛉だったら
miyamakawa tombodattara

Noun
Da Copula

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

1. If/when it were a mountain stream dragonfly…; If/when being a mountain stream dragonfly…

Tara Conditional
Usually Written in Kana