also: アイスブレーク
noun
icebreaker; breaking the ice
Refers to an activity, game, or remark that helps people relax and start talking in a social or professional setting.
会議の最初にアイスブレイクをしましょう。
Let's do an icebreaker at the beginning of the meeting.
自己紹介ゲームはいいアイスブレイクになる。
A self-introduction game makes a good icebreaker.