表音 ひょうおん しき仮名遣 かなずかいでしょう
hyō onshi kikana zukaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 表音式仮名遣い

1. Probably Hepburn romanization.; Probably romanization based on pronunciation.

Polite
Presumptive
Conjecture