確認 かくにん飛行 ひこう物体 ぶったいでしょう
mikakunin hikōbuttaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 未確認飛行物体

1. Probably a UFO.; It's likely an unidentified flying object.

Polite
Presumptive
Conjecture