noun
preparatory committee
A committee formed to make preparations for an event, project, or organization.
来月の大会に向けて準備委員会が発足した。
A preparatory committee was launched for next month's conference.
実行委員会 is an executive committee that carries out plans, while 準備委員会 focuses on preparation and planning.
Compound of 準備 (preparation) + 委員会 (committee).