The Prime Minister (内閣総理大臣 Naikaku-sōri-daijin, or 首相 Shushō) is the head of government of Japan. The Prime Minister is appointed by the Emperor of Japan after being designated by the National Diet and must enjoy the confidence of the House of Representatives to remain in office. He or she is the head of the Cabinet and appoints and dismisses the other Ministers of State. The literal translation of the Japanese name for the office is Minister for the Comprehensive Administration of (or the Presidency over) the Cabinet.
Prior to the adoption of the Meiji Constitution, Japan had in practice no written constitution. Originally, a Chinese-inspired legal system known as ritsuryō was enacted in the late Asuka period and early Nara period. It described a government based on an elaborate and rational meritocratic bureaucracy, serving, in theory, under the ultimate authority of the Emperor; although in practice, real power was often held elsewhere, such as in the hands of the Fujiwara clan, who intermarried with the Imperial Family in the Heian period, or by the ruling Shogun. Theoretically, the last ritsuryō code, the Yōrō Code enacted in 752, was still in force at the time of the Meiji Restoration.
Under this system, the Daijō-daijin (太政大臣, Chancellor of the Realm) was the head of the Daijō-kan (Department of State), the highest organ of Japan's pre-modern Imperial government during the Heian period and until briefly under the Meiji Constitution with the appointment of Sanjō Sanetomi in 1871. The office was replaced in 1885 with the appointment of Itō Hirobumi to the new position of Prime Minister, four years before the enactment of the Meiji Constitution, which mentions neither the Cabinet nor the position of Prime Minister explicitly. It took its current form with the adoption of the Constitution of Japan in 1947.
To date, 62 people have served this position. The current Prime Minister is Shinzō Abe, who re-took office on December 26, 2012. He is the first former Prime Minister to return to office since 1948, and the 6th longest serving member to date.
The Prime Minister is designated by both houses of the Diet, before the conduct of any other business. For that purpose, each conducts a ballot under the run-off system. If the two houses choose different individuals, then a joint committee of both houses is appointed to agree on a common candidate. Ultimately, however, if the two houses do not agree within ten days, the decision of the House of Representatives is deemed to be that of the Diet. Therefore, the House of Representatives can theoretically ensure the appointment of any Prime Minister it wants. The candidate is then presented with their commission, and formally appointed to office by the Emperor.
Located near the Diet building, the Office of the Prime Minister of Japan is called the Kantei (官邸). The original Kantei served from 1929 until 2002, when a new building was inaugurated to serve as the current Kantei. The old Kantei was then converted into the Official Residence, or Kōtei (公邸). The Kōtei lies to the southwest of the Kantei, and is linked by a walkway.
Until the mid-1930s, the Prime Minister of Japan was normally granted a hereditary peerage (kazoku) prior to leaving office if he had not already been ennobled. Titles were usually bestowed in the ranks of count, viscount or baron, depending on the relative accomplishments and status of the Prime Minister. The two highest ranks, marquess and prince, were only bestowed upon highly distinguished statesmen, and were not granted to a Prime Minister after 1928. The last Prime Minister who was a peer was Baron Kijūrō Shidehara, who served as Prime Minister from October 1945 to May 1946. The peerage was abolished when the Constitution of Japan came into effect in May 1947.
Certain eminent Prime Ministers have been awarded the Order of the Chrysanthemum, typically in the degree of Grand Cordon. The highest honour in the Japanese honours system, the Collar of the Order of the Chrysanthemum, has only been conferred upon select Prime Ministers and eminent statesmen; the last such award to a living Prime Minister was to Saionji Kinmochi in 1928. More often, the Order of the Chrysanthemum has been a posthumous distinction; the Collar of the order was last awarded posthumously to former Prime Minister Eisaku Satō in June 1975. The Grand Cordon has typically been posthumously awarded; the most recent such award was to Ryutaro Hashimoto in July 2006. Currently, Yasuhiro Nakasone is the only living former Prime Minister to hold the Grand Cordon of the Order of the Chrysanthemum, which he received in 1997.
After relinquishing office, the Prime Minister is normally accorded the second or senior third rank in the court order of precedence, and is usually raised to the senior second rank posthumously. Certain distinguished Prime Ministers have been posthumously raised to the first rank; the last such award was to Sato Eisaku in 1975. Since the 1920s, following their tenure in office, Prime Ministers have typically been conferred with the Grand Cordon of the Order of the Paulownia Flowers (until 2003 a special higher class of the Order of the Rising Sun), depending on tenure and eminence. However, honours may be withheld due to misconduct or refusal on the part of the Prime Minister (for example, Kiichi Miyazawa).
As of June 2017, twelve former Prime Ministers of Japan are alive. The most recent death of a former Prime Minister of Japan is that of Kiichi Miyazawa (1991–93) on June 28, 2007. Shinzō Abe, who served as Prime Minister from 2006 to 2007, is currently serving and thus is not included on this list.
|Number||Name||Tenure||Date of birth||Age|
|1||Yasuhiro Nakasone||1982–1987||27 May 1918||99|
|2||Toshiki Kaifu||1989–1991||2 January 1931||86|
|3||Morihiro Hosokawa||1993–1994||14 January 1938||79|
|4||Tsutomu Hata||1994||24 August 1935||81|
|5||Tomiichi Murayama||1994-1996||3 March 1924||93|
|6||Yoshirō Mori||2000-2001||14 July 1937||79|
|7||Junichiro Koizumi||2001-2006||8 January 1942||75|
|8||Yasuo Fukuda||2007–2008||16 July 1936||80|
|9||Taro Aso||2008–2009||20 September 1940||76|
|10||Yukio Hatoyama||2009-2010||11 February 1947||70|
|11||Naoto Kan||2010-2011||10 October 1946||70|
|12||Yoshihiko Noda||2011-2012||20 May 1957||60|
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