Usage patterns
〈事〉についてシンポジウムを開くto hold a symposium on a topic
They held a symposium on environmental issues.
シンポジウムに参加するto take part in a symposium
I took part in a symposium hosted by the university.
シンポジウムで発表するto give a presentation at a symposium
He presented his research findings at an international symposium.