expression, godan verb (-ru)
undertake a duty; take on a responsibility
Used when someone formally or seriously takes on a role, task, or responsibility, often in official or organizational contexts.
彼は新しいプロジェクトのリーダーの任に当たった。
He undertook the duty of leader for the new project.
委員長の任に当たるにあたり、一
As I take on the responsibility of committee chair, I would like to say a few words.