中ちゅう心しん人じん物ぶつ

noun

central figure; leader; key person

Refers to the most important or influential person in a group, project, or event. Often used in formal or organizational contexts.

• 彼かれはこのプロジェクトの中ちゅう心しん人じん物ぶつだ。

  He is the central figure of this project.

• その事じ件けんの中ちゅう心しん人じん物ぶつがついに逮たい捕ほされた。

  The key person in that incident was finally arrested.