日本 にっぽん国有 こくゆう鉄道 てつどうでしょう
nipponkokuyūtetsudōdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 日本国有鉄道

1. Probably Japan National Railways.; It must be Japan National Railways.

Polite
Presumptive
Conjecture