conference; council; convention
A formal meeting or organized body where people discuss and make decisions, often used in official or organizational names.
A conference on environmental issues will be held next month.
He is a member of the local disaster prevention council.
協議会 stresses joint consultation and discussion among members, whereas 委員会 is the broader, more general term for any organized committee.
joint management council; labor-management council
joint meeting of both houses
Compound of 協議 (consultation, discussion) and 会 (meeting, association).