colloquium; symposium; discussion meeting
An academic or formal gathering for discussion, often held at universities or research institutions.
A colloquium will be held at the university next week.
He presented his latest research findings at the symposium.
研究会 is a broader term for a study group or research meeting, while 談話会 emphasizes discussion and exchange of ideas.
Compound of 談話 (danwa, 'discussion') and 会 (kai, 'meeting').