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The National Diet is the national legislature of Japan. It is composed of a lower house, called the House of Representatives, and an upper house, the House of Councillors. Both houses are directly elected under a parallel voting system. In addition to passing laws, the Diet is formally responsible for nominating the Prime Minister. The Diet was first established as the Imperial Diet in 1890 under the Meiji Constitution, and took its current form in 1947 upon the adoption of the post-war constitution. Both houses meet in the National Diet Building in Nagatachō, Chiyoda, Tokyo.
The House of Representatives is the lower house of the National Diet of Japan. The House of Councillors is the upper house. The composition of the House is established by Article 41 and Article 42 of the Constitution of Japan. The House of Representatives has 465 members, elected for a four-year term. Of these, 176 members are elected from 11 multi-member constituencies by a party-list system of proportional representation, and 289 are elected from single-member constituencies.
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 Social Democratic Party is a political party in Japan that was established in 1996. Since its reformation and name change in 1996, it has advocated pacifism and defined itself as a social-democratic party. It was previously known as the Japan Socialist Party.
The Japanese political process has two types of elections.
Tarō Yamamoto is a Japanese politician and former actor, who is the founder and current leader of the anti-establishment political party Reiwa Shinsengumi. Yamamoto served as a member of the House of Councillors from 2013 to 2019 for Tokyo, initially as an independent and later as member of the People's Life Party / Liberal Party. He was a candidate in the 2020 Tokyo gubernatorial election, as a member of Reiwa Shinsengumi.
Ai Aoki is a Japanese politician and current member of the People's Life Party. She is a native of Tokyo and graduate of Chiba University. After a career in education, Aoki entered politics in 2003 and has served a total of four terms in the national Diet of Japan, having sat in the House of Representatives from 2003–2005 and 2009–2014, and a partial term in the House of Councillors from 2007–2009. Aoki was returned to the House of Councillors in the election held on 10 July 2016.
Yukishige Okubo is a Japanese politician of the Democratic Party of Japan, a fmember of the House of Councillors in the Diet. A native of Isahaya, Nagasaki and graduate of Nagasaki University, he had served in the assembly of Nagasaki Prefecture since 2003. After running unsuccessfully for the House of Representatives in 2005, he was elected to the House of Councillors for the first time in 2007.
The Hokkaido at-large district is a constituency of the House of Councillors in the Diet of Japan. It consists of the prefecture (dō) of Hokkai[dō] and is represented by six Councillors electing three at a time every three years by single non-transferable vote for six-year terms. In the election period from 2019 to 2022, Hokkaido's Councillors are :
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.
The Liberal Party was a political party in Japan that merged with the Democratic Party for the People on 26 April 2019. It had 2 out of the 475 seats in the House of Representatives, and 3 in the 242-member House of Councillors prior to merging. Formed as the People's Life Party (生活の党) in December 2012, it changed its name to People's Life Party & Taro Yamamoto and Friends (生活の党と山本太郎となかまたち) in December 2014. The party adopted the name Liberal Party in October 2016 in preparation for an expected general election in early 2017.
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.
The Hyogo at-large district is a constituency that represents Hyogo Prefecture in the House of Councillors in the Diet of Japan. It currently has five Councillors in the 242-member house, but this representation will increase to six by July 2019.
The Kochi at-large district was a constituency that represents Kōchi Prefecture in the House of Councillors in the Diet of Japan. Councillors are elected to the house by single non-transferable vote (SNTV) for six-year terms. Since the establishment of the current House of Councillors electoral system in 1947, the district has elected two Councillors, one each at elections held every three years. With its 618,834 registered voters it is the third-smallest electoral district for the house. To address the imbalance in representation between districts, a 2015 revision of the Public Officers Election Law will see the district merged with the Tokushima At-large district to create the Tokushima-Kochi At-large district; this change will begin to take effect at the 2016 election, at which one Councillor will be elected.
The Tokushima-Kochi at-large district is a constituency of the House of Councillors in the Diet of Japan. The district was formed in 2015 from a merger of the Tokushima and Kōchi at-large districts. Liberal Democratic Party member Yusuke Nakanishi was elected as its first representative at the House of Councillors election in July 2016.
The Tottori-Shimane at-large district is a constituency of the House of Councillors in the Diet of Japan. It was formed pursuant to a 2015 revision of the Public Officers Election Law from a merger of the Tottori and Shimane at-large districts, the two smallest districts in the country, to address the imbalance in representation between rural and urban voters. The district has 1,068,348 registered voters and was contested for the first time at the House of Councillors election that was held on 10 July 2016.
The Fukushima at-large district is a constituency that represents Fukushima Prefecture in the House of Councillors in the Diet of Japan. It currently has three Councillors in the 242-member house.
The Gifu at-large district is a constituency that represents Gifu Prefecture in the House of Councillors in the Diet of Japan. It currently has three Councillors in the 242-member house.
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.
House of Councillors elections were held in Japan on 10 July 2022 to elect 125 of the 248 members of the upper house of the National Diet, for a term of six years. The elections occurred after the assassination of Shinzo Abe, former Prime Minister of Japan on 8 July 2022. The elected candidate with the fewest votes in the Kanagawa prefectural district will serve for three years, as the district combined its regular and byelections.