noun
joint committee of both houses
A formal term in Japanese parliamentary procedure, referring to a committee composed of members from both the House of Representatives and the House of Councillors to resolve differences on bills or other matters.
法案の修正について両院協議会が開かれた。
A joint committee of both houses was convened to discuss amendments to the bill.
Compound of 両院 (both houses) + 協議会 (conference, council). The term is a direct description of its function in the Japanese Diet.