The National Diet Building (国会議事堂 Kokkai-gijidō) is the place in which both the houses of the Diet of Japan are held. It is located in 1-chome, Nagatacho, Chiyoda Ward, Tokyo.
Sessions of the House of Representatives take place in the left side and sessions of the House of Councillors in the right side. The construction of the building began in 1920 and completed in 1936.
