東海道とうかいどう五十ごじゅうさんでしょう
tōkai dō gojū sanjideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 東海道五十三次

1. Probably the Fifty-three Stations of the Tōkaidō.

Polite
Presumptive
Conjecture