noun
member of the House of Representatives; Lower House member
Refers specifically to an elected member of Japan's House of Representatives (衆議院), the lower house of the National Diet.
彼は衆議院議員に当選した。
He was elected as a member of the House of Representatives.
Member of the House of Councillors (upper house), as opposed to the lower house.
Compound of 衆議院 (House of Representatives) and 議員 (member of an assembly).