はぼうきかいでしょう
羽箒貝でしょう
habōkikaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of はぼうきがい

1. Probably a feather duster.; Probably a shellfish broom.

Polite
Presumptive
Conjecture
Usually Written in Kana