National Diet Building

National Diet Building
国会議事堂
Front view of the building in 2019
Interactive map of the National Diet Building area
Alternative namesImperial Parliament Building
Record height
Tallest in Japan from 1936 to 1964[I]
Preceded byFive-storied pagoda in Tō-ji, Kyoto
Surpassed byHotel New Otani Tokyo
General information
Architectural styleArt Deco
LocationNagatachō, Chiyoda, Tokyo, Japan
Coordinates35°40′33″N 139°44′41″E / 35.67583°N 139.74472°E / 35.67583; 139.74472
Construction started1920
Completed7 November 1936 (1936-11-07)
OwnerGovernment of Japan
Governing bodyNational Diet of Japan
Height
Height65.45 m (214.7 ft)
Technical details
Floor count9
Floor area53,464 m2 (575,480 sq ft)
Design and construction
ArchitectMinistry of Finance
Other information
Public transit accessKokkai-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, 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.