沖縄 おきなわ返還 へんかん協定 きょうていでしょう
okinawahenkankyōteideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 沖縄返還協定

1. Probably the Okinawa Reversion Treaty.

Polite
Presumptive
Conjecture