主要 しゅよう こく首脳 しゅのう会議 かいぎでしょう
shuyō koku shunō kaigideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 主要国首脳会議

1. Probably a summit of major national leaders.

Polite
Presumptive
Conjecture