くろじっうぐいすかぐらでしょう
黒実鶯神楽でしょう
kuroji' uguisukaguradeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of くろみのうぐいすかぐら

1. Probably Kurozumi-uguisu-kagura.

Polite
Presumptive
Conjecture
Usually Written in Kana