主しゅ宰さい者しゃ

noun

president; chairman; organizer

Refers to the person who takes the lead in organizing and running a group, meeting, or event. Often implies a hands-on leadership role rather than a purely honorary title.

• 彼かれはその学がっ会かいの主しゅ宰さい者しゃとして、毎まい年ねんの大たい会かいを運うん営えいしている。

  As the president of that academic society, he runs the annual conference.

• 主しゅ宰さい者しゃの挨あい拶さつで会かい議ぎが始はじまった。

  The meeting began with an address by the chairman.