漢字 かんじ仮名交 かなまじり ぶんでしょう
kanjika namajiri bundeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 漢字仮名交じり文

1. Probably a mixed Japanese-kanji/kana sentence.

Polite
Presumptive
Conjecture