姉妹 しまい友好 ゆうこう都市 とし関係 かんけいでしょう
shimai yūkōto shi kankeideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 姉妹友好都市関係

1. Sister city relationship; Probably a sister city relationship

Polite
Presumptive
Conjecture