せいようはこやなぎでしょう
西洋箱柳でしょう
seiyōhakoyanagideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of せいようはこやなぎ

1. Probably a willow box.; Probably a Western-style box.

Polite
Presumptive
Conjecture
Usually Written in Kana