みやまかわとんぼでしょう
深山川蜻蛉でしょう
miyamakawa tombodeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of みやまがわとんぼ

1. Probably a mountain dragonfly.

Polite
Presumptive
Conjecture
Usually Written in Kana