ichidan verb, intransitive verb
step forward; come forward; volunteer
Describes physically stepping out from a group or figuratively volunteering oneself for a task or role.
彼は群衆の中から進み出て、質問に答えた。
He stepped forward from the crowd and answered the question.
誰かがリーダー役に進み出る必要がある。
Someone needs to volunteer for the role of leader.