みやまかわとんぼなら
深山川蜻蛉なら
miyamakawa tombonara

Noun
Da Copula

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

1. If/when deep mountains and rivers have dragonflies:; If/when there are dragonflies in the deep mountains and rivers:

Nara Conditional
Usually Written in Kana