National Diet Building

National Diet Building
National Diet Building
国会議事堂
	Front view of the building in 2019
Alternative names	Imperial Parliament Building
Record height
	Tallest in Japan from 1936 to 1964[I]
Preceded by	Five-storied pagoda in Tō-ji, Kyoto
Surpassed by	Hotel New Otani Tokyo
General information
Architectural style	Art Deco
Address	Nagatachō, Chiyoda, Tokyo
Country	Japan
Coordinates	35°40′33″N 139°44′41″E / 35.67583°N 139.74472°E
Construction started	30 January 1920 (Taishō 9)
Completed	7 November 1936 (Showa 11)
Owner	Government of Japan
Governing body	National Diet of Japan
Height	Both wings 20.91 m (68.6 ft); Central tower 65.45 m (214.7 ft)
Technical details
Floor count	3 floors above ground, 1 floor below ground, 4 floors of central tower (9 floors at the top of the tower)
Design and construction
Architect(s)	Ministry of Finance Temporary House Building Bureau
Other information
Public transit access	Kokkai-gijidō-mae Station; Nagatachō Station

The National Diet Building (国会議事堂, Kokkai-gijidō) is the building where both houses of the National Diet of Japan meet. It is located at Nagatachō 1-chome 7–1, Chiyoda, Tokyo.

Sessions of the House of Representatives take place in the south wing and sessions of the House of Councillors in the north wing.

The Diet Building was completed in 1936 and is constructed entirely of Japanese materials, with the exception of the stained glass, door locks, and pneumatic tube system.