National Diet Building

Tokyo, Kanto

Symbol of Japan's politics
Stately building

The National Diet Building is the center of Japan’s politics as it is the place where Diet sessions are held. The building is in Nagata-cho, Chiyoda ward, Tokyo, and features a pyramid-like tower in its center. It was completed in 1936 after 17 years of work involving a total of 2.54 million people at a cost of 25,736,000 yen.

The stately building is 206.36 m long and 88.63 m deep, with the central tower standing 65.45 m tall. Seen from the front, the building has a chamber for the House of Councillors on the right and one for the House of Representatives on the left. In the center hall directly under the central tower, the bronze statutes of Hirobumi Ito, Shigenobu Okuma and Taisuke Itagaki-credited with the formulation of the Constitution of the Empire of Japan (Japan’s first modern constitution, also called the Meiji Constitution)-were erected to commemorate the 50th anniversary of the promulgation of the constitution. The central tower was the tallest building in Japan when it was completed.

Groups of up to 10 people are allowed to look around the House of Councillors building without an advance reservation, visiting such places as the lobby for visitors, the chamber floor, the room built as a rest area for the Emperor, and the center hall. A referral from a House of Representative member is required to enter the lower-house building. In principle, the Diet Building is lit up from sunset to 8 pm every day. The practice started in 1990 to commemorate the 100th anniversary of the establishment of the Diet.


1-7-1 Nagata Town, Chiyoda-ku, Tokyo
9:00-17:00 (admission until 16:00). Tours not allowed from 1 hour before a plenary session until it ends.
Admission Fee
Free (advance reservation required for groups of more than 10 people)
You can sign up for the tours at the House of Councillors' reception desk for visitors located behind the Diet Building

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