- 47 prefectures; Aichi, Akita, Aomori, Chiba, Ehime, Fukui, Fukuoka, Fukushima, Gifu, Gunma, Hiroshima, Hokkaido, Hyogo, Ibaraki, Ishikawa, Iwate, Kagawa, Kagoshima, Kanagawa, Kochi, Kumamoto, Kyoto, Mie, Miyagi, Miyazaki, Nagano, Nagasaki, Nara, Niigata, Oita, Okayama, Okinawa, Osaka, Saga, Saitama, Shiga, Shimane, Shizuoka, Tochigi, Tokushima, Tokyo, Tottori, Toyama, Wakayama, Yamagata, Yamaguchi, Yamanashi
- Birthday of Emperor NARUHITO, 23 February
- Civil law system based on German model; system also reflects Anglo-American influence and Japanese traditions; judicial review of legislative acts in the Supreme Court
- chief of state: Emperor NARUHITO (since 1 May 2019); note - succeeds his father who abdicated on 30 April 2019
head of government: Prime Minister Yoshihide SUGA (since 16 September 2020 ); Deputy Prime Minister Taro ASO (since 26 December 2012)
cabinet: Cabinet appointed by the prime minister
elections/appointments: the monarchy is hereditary; the leader of the majority party or majority coalition in the House of Representatives usually becomes prime minister - description: bicameral Diet or Kokkai consists of:
House of Councillors or Sangi-in (242 seats; 146 members directly elected in multi-seat districts by simple majority vote and 96 directly elected in a single national constituency by proportional representation vote; members serve 6-year terms with half the membership renewed every 3 years)
House of Representatives or Shugi-in (465 seats; 289 members directly elected in single-seat districts by simple majority vote and 176 directly elected in multi-seat districts by party-list proportional representation vote; members serve 4-year terms)
elections:
House of Councillors - last held on 10 July 2016 (next to be held in July 2019)
House of Representatives - last held on 22 October 2017 (next to be held by 21 October 2021)
election results:
House of Councillors - percent of vote by party - NA; seats by party - LDP 55, DP 32, Komeito 14, JCP 6, Osaka Ishin no Kai (Initiatives from Osaka) 7, PLPTYF 1, SDP 1, independent 5
House of Representatives - percent of vote by party - NA; seats by party - LDP 284, CDP 55, Party of Hope 50, Komeito 29, JCP 12, JIP 11, SDP 2, independent 22
note: the Diet in June 2017 redrew Japan's electoral district boundaries and reduced from 475 to 465 seats in the House of Representatives; the amended electoral law, which cuts 6 seats in single-seat districts and 4 in multi-seat districts, was reportedly intended to reduce voting disparities between densely and sparsely populated voting districts - highest courts: Supreme Court or Saiko saibansho (consists of the chief justice and 14 associate justices); note - the Supreme Court has jurisdiction in constitutional issues
judge selection and term of office: Supreme Court chief justice designated by the Cabinet and appointed by the monarch; associate justices appointed by the Cabinet and confirmed by the monarch; all justices are reviewed in a popular referendum at the first general election of the House of Representatives following each judge's appointment and every 10 years afterward
subordinate courts: 8 High Courts (Koto-saiban-sho), each with a Family Court (Katei-saiban-sho); 50 District Courts (Chiho saibansho), with 203 additional branches; 438 Summary Courts (Kani saibansho) - Women make up 10.5 percent of the Japanese Parliament as of 2018.