also: アイスブレイキング
noun
icebreaker; breaking the ice
A social activity or technique used to reduce tension and encourage interaction among people who are meeting for the first time or in a formal setting.
from English ice-breaking
会議の最初にアイスブレーキングを行った。
We did an icebreaker at the beginning of the meeting.
アイスブレーキングとして自己紹介ゲームをした。
We played a self-introduction game as an icebreaker.