だい日本にっぽん帝国ていこく憲法けんぽうでしょう
dainipponteikokukempōdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 大日本帝国憲法

1. Probably the Greater Japan Imperial Constitution.

Polite
Presumptive
Conjecture