noun
member of the House of Representatives; lower house member
Refers specifically to a member of the 衆議院 (House of Representatives), the lower house of Japan's National Diet.
彼は衆院議員に当選した。
He was elected as a member of the House of Representatives.
衆院議員の任期は4年だが、解散があればその前に終わる。
The term of a lower house member is four years, but it ends earlier if the house is dissolved.
Compound of 衆院 (shūin, abbreviation of 衆議院 'House of Representatives') and 議員 (giin, 'member of an assembly').