Tokyo currently sends 53 elected members to the Diet of Japan, 42 to the House of Representatives and 11 to the House of Councillors.
Tokyo currently sends 53 elected members to the Diet of Japan, 42 to the House of Representatives and 11 to the House of Councillors.
The current House of Representatives Tokyo delegation consists of 21 members of the LDP, 13 CDP, 3 Komeito, 2 Ishin, 2 JCP and 1 Reiwa.
Alongside Hokkaido, Tokyo is the only other prefecture-level division with its own proportional representation block. The PR block consists of 17 members.
| Representative | Party | District contested | Incumbency |
|---|---|---|---|
 Kei Takagi | Liberal Democratic | None | 22 October 2017 – present |
 Miki Yamada | Tokyo-19th | 31 October 2021 – present | |
 Takao Ochi | Tokyo-6th | 22 October 2017 – present | |
 Kenji Wakamiya | Tokyo-5th | 31 October 2021 – present | |
 Akihisa Nagashima | Tokyo-18th | 31 October 2021 – present | |
 Hirotaka Ishihara | Tokyo-3rd | 31 October 2021 – present | |
 Shunsuke Ito | Constitutional Democratic | Tokyo-23rd | 22 October 2017 – present |
 Yosuke Suzuki | Tokyo-10th | 31 October 2021 – present | |
 Banri Kaieda | Tokyo-1st | 31 October 2021 – present | |
 Masako Ōkawara | Tokyo-21st | 31 October 2021 – present | |
| Tsukasa Abe | Ishin | Tokyo-12th | 31 October 2021 – present |
 Taisuke Ono | Tokyo-1st | 31 October 2021 – present | |
 Yōsuke Takagi | Komeito | None | 25 June 2000 – present |
| Koichi Kasai | None | 31 October 2021 – present | |
 Akira Kasai | Communist | None | 11 September 2005 – present |
| Tōru Miyamoto | Tokyo-20th | 14 December 2014 – present | |
 Mari Kushibuchi | Reiwa | Tokyo-22nd | 28 April 2022 – present |
The current House of Councillors Tokyo delegation consists of 4 members of the LDP, 2 CDP, 2 JCP, 2 Komeito, 1 DP and 1 independent. The members are elected from the Tokyo at-large district.
| Party | Councillors | Term ends | Incumbency |
|---|---|---|---|
| LDP |  Tamayo Marukawa | 2019 | 29 July 2007 – present |
| Keizō Takemi | 26 December 2012 – present | ||
 Masaharu Nakagawa | 2022 | 26 July 2004 – present | |
 Kentarō Asahi | 26 July 2016 – present | ||
| CDP |  Renhō | 2022 | 11 July 2004 – present |
 Toshio Ogawa | 26 July 1998 – present | ||
| JCP | Taku Yamazoe | 2022 | 26 July 2016 – present |
| Komeito |  Natsuo Yamaguchi | 2019 | 29 July 2001 – present |
 Toshiko Takeya | 2022 | 26 July 2010 – present | |
Politics of Japan are conducted in a framework of a dominant-party bicameral parliamentary constitutional monarchy, in which the Emperor is the head of state and the Prime Minister is the head of government and the head of the Cabinet, which directs the executive branch.
Komeito, formerly New Komeito and abbreviated NKP, is a political party in Japan founded by members of the Buddhist movement Soka Gakkai in 1964. It is generally considered as centrist and conservative. Since 2012, it has served in government as the junior coalition partner of the nationalist and conservative governments led by the Liberal Democratic Party.
The House of Councillors is the upper house of the National Diet of Japan. The House of Representatives is the lower house. The House of Councillors is the successor to the pre-war House of Peers. If the two houses disagree on matters of the budget, treaties, or the nomination of the prime minister, the House of Representatives can insist on its decision. In other decisions, the House of Representatives can override a vote of the House of Councillors only by a two-thirds majority of members present.
The Japanese political process has two types of elections.
Akihiro Ota is a Japanese politician of the Komeito Party, currently serving his seventh term in the House of Representatives in the National Diet. Ota has represented three districts within the Tokyo metropolis since first entering the national Diet in 1993. He served as president of the Komeito Party from 2006 until the general election in September 2009, at which time he lost his seat in the Diet. Upon his return to the House in December 2012, Ota was appointed as the Minister of Land, Infrastructure, Transport and Tourism, a post he held until October 2015.
Prefectural elections for the Tokyo Metropolitan Assembly were held on 12 July 2009. In the runup to the Japanese general election due by October they were seen as an important test for Taro Aso's ruling coalition of the Liberal Democratic Party (LDP) and the New Komeito. New Komeito considers Tokyo as an important stronghold and had repeatedly asked Prime Minister Aso to avoid holding the two elections within a month of each other.
The Shikoku proportional representation block is one of eleven proportional representation (PR) "blocks", multi-member constituencies for the House of Representatives in the Diet of Japan. It consists of Shikoku region covering Tokushima, Kagawa, Ehime and Kōchi Prefectures. Following the introduction of proportional voting it elected seven representatives in the 1996 general election. When the total number of PR seats was reduced from 200 to 180, the Shikoku PR block shrank to six seats.
The Tōkyō proportional representation block, or more formally the proportional representation tier "Tokyo Metropolis electoral district", is one of eleven proportional representation (PR) "blocks", multi-member constituencies for the House of Representatives in the Diet of Japan. It consists solely of the prefecture of Tokyo making it one of two blocks covering only one prefecture, the other being Hokkaido. Following the introduction of proportional voting Tokyo elected 19 representatives by PR in the 1996 general election, and 17 since the election of 2000 when the total number of PR seats was reduced from 200 to 180.
Politics of Kanagawa, as in all prefectures of Japan, takes place in the framework of local autonomy that is guaranteed by the Constitution and laid out in the Local Autonomy Law. The administration is headed by a governor directly elected by the people every four years in first-past-the-post elections. Legislation, the budget and the approval of personnel appointments, including the vice governors, are handled by the prefectural assembly that is directly elected by the people every four years by single-non transferable vote.
Politics of Osaka, as in all 47 prefectures of Japan, takes place in the framework of local autonomy that is guaranteed by chapter 8 of the Constitution and laid out in the Local Autonomy Law. The administration is headed by a governor directly elected by the people every four years in first-past-the-post elections. Legislation, the budget and the approval of personnel appointments, including the vice governors, are handled by the prefectural assembly that is directly elected by the people every four years by single-non transferable vote.
General elections were held in Japan on 22 October 2017. Voting took place in all Representatives constituencies of Japan – 289 single-member districts and eleven proportional blocks – in order to appoint all 465 members of the House of Representatives, the lower house of the then 707-member bicameral National Diet of Japan. Incumbent Prime Minister Shinzō Abe's governing coalition of the Liberal Democratic Party (LDP) and the Komeito party retained their seats in signs of what was perceived as weak opposition. The PM won his fourth term in office and held on to the two-thirds supermajority in order to implement policies on revising the war-renouncing Article 9 of the Japanese Constitution.
House of Councillors elections were held in Japan on Sunday 10 July 2016 to elect 121 of the 242 members of the House of Councillors, the upper house of the National Diet, for a term of six years. As a result of the election, the Liberal Democratic Party–Komeito coalition gained ten seats for a total of 145, the largest coalition achieved since the size of the house was set at 242 seats.
General elections were held in Japan on 31 October 2021, as required by the constitution. Voting took place in all constituencies in order to elect members to the House of Representatives, the lower house of the National Diet. As the constitution requires the cabinet to resign in the first Diet session after a general election, the elections will also lead to a new election for Prime Minister in the Diet, and the appointment of a new cabinet, although ministers may be re-appointed. The election was the first general election of the Reiwa era.
Hokkaido currently sends 17 elected members to the Diet of Japan, 12 to the House of Representatives and 5 to the House of Councillors. The prefecture will send 6 Councillors starting 2019.
Okinawa currently sends 8 elected members to the Diet of Japan, 6 to the House of Representatives and 2 to the House of Councillors.
Niigata currently sends 12 elected members to the Diet of Japan, 10 to the House of Representatives and 2 to the House of Councillors. The prefecture lost 1 Councillor due to reapportionment in 2019.
House of Councillors elections were held in Japan on 21 July 2019 to elect 124 of the 245 members of the House of Councillors, the upper house of the then 710-member bicameral National Diet, for a term of six years.
Aichi Prefecture currently sends 36 elected members to the Diet of Japan, 29 to the House of Representatives and 7 to the House of Councillors.
On April 28, 2024, by-elections in Japan were held in order to fill vacancies in the National Diet of Japan.
