noun
Diet members' office building
Refers to the office building for members of the Japanese National Diet (国会). A specific proper noun in Japanese political context.
議員会館で秘書と打ち合わせをした。
I had a meeting with my secretary at the Diet members' office building.
Compound of 議員 (ぎいん, 'Diet member') and 会館 (かいかん, 'meeting hall' or 'building').