みじんこうきくさでしょう
微塵子浮草でしょう
mijinkōkikusadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of みじんこうきくさ

1. Probably a speck of dust.; Probably insignificant.

Polite
Presumptive
Conjecture
Usually Written in Kana