本門 ほんもん ぶつ立宗 りっそうでしょう
hommombutsuri' sōdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 本門佛立宗

1. Probably the origin of the Honmon Buddhist sect.

Polite
Presumptive
Conjecture