Tomoya Hosoda (細田 智也, Hosoda Tomoya; born 14 November 1991) is a Japanese politician who, on 17 March 2017, became the…Tomoya Hosoda (細田 智也, Hosoda Tomoya; born 14 November 1991) is a Japanese politician who, on 17 March 2017, became the first transgender man politician to be elected to office when he was elected to the city council of Iruma, Saitama. He was re-elected on 17 March 2025. He underwent gender confirmation surgery in 2015 at the age of 23. After graduating from Teikyo University, he had worked as medical technologist at a hospital in Shizuoka before he was elected.
Jun Mukōyama (向山淳 and むこうやま じゅん), nicknames: "Mukojun, Jun-chan", (born November 19, 1983) is a Japanese politician.…Jun Mukōyama (向山淳 and むこうやま じゅん), nicknames: "Mukojun, Jun-chan", (born November 19, 1983) is a Japanese politician. She is a member of the House of Representatives and Parliamentary Vice-Minister for Internal Affairs and Communications.
Susumu Yamaguchi (山口晋, Yamaguchi Susumu; born 28 July 1983) is a Japanese politician. He has been a member of the House…Susumu Yamaguchi (山口晋, Yamaguchi Susumu; born 28 July 1983) is a Japanese politician. He has been a member of the House of Representatives since 2026, having previously served from 2021 to 2024. He is the son of Taimei Yamaguchi.
Naomichi Suzuki (鈴木 直道, Suzuki Naomichi; born 14 March 1981) is a Japanese politician who currently serves as the…Naomichi Suzuki (鈴木 直道, Suzuki Naomichi; born 14 March 1981) is a Japanese politician who currently serves as the governor of Hokkaidō. He previously served as mayor of Yūbari city for two consecutive terms from 2011 to 2019. He had also served in Regional Sovereignty Strategy Office of Cabinet Office and as a chief of General Affairs Division in General Affairs Department at Tokyo Governor's Office.
Hideki Murai (村井 英樹, Murai Hideki; born 14 May 1980) is a Japanese politician who serves as chairman of the Diet…Hideki Murai (村井 英樹, Murai Hideki; born 14 May 1980) is a Japanese politician who serves as chairman of the Diet Affairs Committee in the Liberal Democratic Party since 2026. He was Deputy Chief Cabinet Secretary from 2023 to 2024. He has represented Saitama 1st district in the House of Representatives since 2012. Born in Saitama Prefecture and educated at the University of Tokyo, Murai was an official in the Ministry of Finance before entering politics.
Ryuji Hijikata (土方 隆司, Hijikata Ryūji) (born May 17, 1978) is a Japanese professional wrestler also known under the…Ryuji Hijikata (土方 隆司, Hijikata Ryūji) (born May 17, 1978) is a Japanese professional wrestler also known under the ring name Toshizo (歳三, Toshizō). Hijikata is best known for his tenure in Battlarts and All Japan Pro Wrestling since 2002 where he is a former World Junior Heavyweight Champion.
Atsushi Nonaka (野中 厚, Nonaka Atsushi; born 17 November 1976) is a Japanese politician and a member of the House of…Atsushi Nonaka (野中 厚, Nonaka Atsushi; born 17 November 1976) is a Japanese politician and a member of the House of Representatives.
Yasushi Hosaka (穂坂泰, Hosaka Yasushi; born 17 February 1974) is a Japanese politician serving as a member of the House…Yasushi Hosaka (穂坂泰, Hosaka Yasushi; born 17 February 1974) is a Japanese politician serving as a member of the House of Representatives since 2017. From 2016 to 2017, he was a city councillor of Shiki.
Masaaki Taniai (谷合 正明, Taniai Masaaki; born 1973) is a Japanese politician of the New Komeito Party, a member of the…Masaaki Taniai (谷合 正明, Taniai Masaaki; born 1973) is a Japanese politician of the New Komeito Party, a member of the House of Councillors in the Diet (national legislature). A native of Niiza, Saitama, he attended Kyoto University and received a master's degree in agricultural economy from it. He also studied at Uppsala University in Sweden. He was elected to the House of Councillors for the first time in 2004.
Takeharu Yamanaka (山中 竹春, Yamanaka Takeharu; born 27 September 1972) is a Japanese politician and current mayor of…Takeharu Yamanaka (山中 竹春, Yamanaka Takeharu; born 27 September 1972) is a Japanese politician and current mayor of Yokohama, the capital of Kanagawa Prefecture. He defeated incumbent mayor Fumiko Hayashi in the 2021 Yokohama mayoral election. His independent campaign was supported by the Constitutional Democratic Party, Social Democratic Party, and the Communist Party of Japan. Yamanaka's campaign focused on the opposition for a planned integrated resort development and casino for the city which was to be built on Yamashita Pier, criticism against the government's response to the COVID-19 pandemic, and additional sister city relationship with San Francisco, California. Yamanaka formerly worked as a professor at Yokohama City University and as a data scientist. On 16 January 2026, Yamanaka issued a public apology after Yokohama's human resource chief, Jun Kubota, accused Yamanaka of using terms such as "idiot" and "human scum" to disparage staff. In July 2026, a third-party investigation confirmed these allegations and also Yamanaka saying things like "everyone over 55 is stubborn and useless", even telling an official to "disembowel" if he failed to secure a bid to host an international conference. On 28 August 2026, two weeks after some of Japan's major political parties urged him to step down from his post, Yamanaka announced his intention to resign as the mayor of Yokohama.
Kazuyuki Nakane (中根 一幸, Nakane Kazuyuki; born 11 July 1969) is a former Japanese politician who served in the House of…Kazuyuki Nakane (中根 一幸, Nakane Kazuyuki; born 11 July 1969) is a former Japanese politician who served in the House of Representatives in the Diet (national legislature) as a member of the Liberal Democratic Party. A native of Kōnosu, Saitama he attended Nippon Sport Science University as an undergraduate and Senshu University as a graduate student. He was elected to the Diet for the first time in 2005 after unsuccessfully running for mayor of his hometown Kōnosu in 2001.
Yasue Funayama (舟山 康江, Funayama Yasue; born May 26, 1966) is a Japanese politician and a member of the House of…Yasue Funayama (舟山 康江, Funayama Yasue; born May 26, 1966) is a Japanese politician and a member of the House of Councillors (Japan) in the Diet (national legislature).
Yoshinori Yamaguchi (Japanese: 山口 祥義, Hepburn: Yamaguchi Yoshinori; born July 1, 1965) is a Japanese politician and the…Yoshinori Yamaguchi (Japanese: 山口 祥義, Hepburn: Yamaguchi Yoshinori; born July 1, 1965) is a Japanese politician and the current governor of Saga Prefecture located in the Kyushu region of Japan.
Yukio Tomioka (富岡 由紀夫, Tomioka Yukio; born April 3, 1964) is a Japanese politician of the Democratic Party of Japan, a…Yukio Tomioka (富岡 由紀夫, Tomioka Yukio; born April 3, 1964) is a Japanese politician of the Democratic Party of Japan, a former member of the House of Councillors in the Diet (national legislature). A native of Kawaguchi, Saitama and graduate of Waseda University, he worked at the Fuji Bank (now part of Mizuho Financial Group) from 1987 until 2003 when he ran unsuccessfully for the House of Representatives. In 2004, he was elected to the House of Councillors for the first time.
Motohiro Ōno (大野 元裕, Ōno Motohiro; born 12 November 1963) is a Japanese politician and the current governor of Saitama…Motohiro Ōno (大野 元裕, Ōno Motohiro; born 12 November 1963) is a Japanese politician and the current governor of Saitama Prefecture in Japan. He assumed office replacing Kiyoshi Ueda in the August 2019 gubernatorial elections. Ōno previously served as a member of the House of Councilors from 2010 to 2019 and was a senior researcher at the Middle East Institute of Japan.
Ryosei Tanaka (田中 良生, Tanaka Ryōsei; born 11 November 1963) is a Japanese politician serving in the House of…Ryosei Tanaka (田中 良生, Tanaka Ryōsei; born 11 November 1963) is a Japanese politician serving in the House of Representatives in the Diet (national legislature) as a member of the Liberal Democratic Party. A native of Warabi, Saitama and graduate of Rikkyo University, he was elected for the first time in 2005.
Hideo Yoritaka (頼高 英雄, Yoritaka Hideo; born 10 October 1963) is a Japanese politician and the current mayor of the city…Hideo Yoritaka (頼高 英雄, Yoritaka Hideo; born 10 October 1963) is a Japanese politician and the current mayor of the city of Warabi in Saitama Prefecture. He was first elected in 2007 and was re-elected most recently for a fifth term in 2023, defeating a candidate from the Liberal Democratic Party. He is a member of the Japanese Communist Party.
Toshiharu Furukawa (古川 俊治, Furukawa Toshiharu; born 14 January 1963) is a Japanese medical doctor, attorney, and…Toshiharu Furukawa (古川 俊治, Furukawa Toshiharu; born 14 January 1963) is a Japanese medical doctor, attorney, and politician of the Liberal Democratic Party.
Tetsuya Shiokawa (塩川鉄也 Shiokawa Tetsuya) is a Japanese politician and former member of the House of Representatives for…Tetsuya Shiokawa (塩川鉄也 Shiokawa Tetsuya) is a Japanese politician and former member of the House of Representatives for the Japanese Communist Party.
Hideyuki Nakano (born 6 September 1961) is a Japanese politician who is a member of the House of Representatives of…Hideyuki Nakano (born 6 September 1961) is a Japanese politician who is a member of the House of Representatives of Japan.
Gaku Ito (born March 6, 1960, in Saitama Prefecture) is a Japanese politician who has served as a member of the House…Gaku Ito (born March 6, 1960, in Saitama Prefecture) is a Japanese politician who has served as a member of the House of Councillors of Japan from 2019 to 2025. He represented the Saitama at-large district and is a member of the Japanese Communist Party. He was defeated in the July 2025 House of Councillors election.
Satsuki Katayama (née Tomonaga; 9 May 1959) is a Japanese politician serving in Japan's House of Councillors, having…Satsuki Katayama (née Tomonaga; 9 May 1959) is a Japanese politician serving in Japan's House of Councillors, having been elected in July 2010 as a candidate for the Liberal Democratic Party (LDP). She previously represented the Shizuoka 7th district in the House of Representatives for one term from 2005 until 2009. She has served as the first woman Minister of Finance since 21 October 2025 in the first and second Takaichi cabinet.
Etsuji Arai (新井 悦二, Arai Etsuji; born 4 September 1957) is a former Japanese politician of the Liberal Democratic…Etsuji Arai (新井 悦二, Arai Etsuji; born 4 September 1957) is a former Japanese politician of the Liberal Democratic Party, who served as a member of the House of Representatives in the Diet (national legislature). A native of Fukaya, Saitama and graduate of Kanagawa Dental College, he obtained his medical license in 1984 and became the assistant director at a hospital in Fukaya in 1986. He was elected to the Saitama Prefectural Assembly in 2003 (serving for one term) and then to the House of Representatives for the first time in 2005.
Atsushi Oshima (大島 敦, Ōshima Atsushi; born 21 December 1956) is a Japanese politician in the House of Representatives…Atsushi Oshima (大島 敦, Ōshima Atsushi; born 21 December 1956) is a Japanese politician in the House of Representatives in the Diet (national legislature). A native of Kitamoto, Saitama and graduate of Waseda University, he was elected for the first time in 2000.
Noriko Furuya (古屋 範子, Furuya Noriko; born 14 May 1956) is a Japanese politician who served in the House of…Noriko Furuya (古屋 範子, Furuya Noriko; born 14 May 1956) is a Japanese politician who served in the House of Representatives as a member of the Komeito Party. Furuya is from Urawa, Saitama and a graduate of Waseda University, she was elected to the House of Representatives for the first time in 2003.
Hiromi Mitsubayashi (三ッ林 裕巳, Mitsubayashi Hiromi; born 7 September 1955) is a Japanese politician of the Liberal…Hiromi Mitsubayashi (三ッ林 裕巳, Mitsubayashi Hiromi; born 7 September 1955) is a Japanese politician of the Liberal Democratic Party, who serves as a member of the House of Representatives.
Iemitsu Arai (新井 家光, Arai Iemitsu; born 5 May 1955) is a Japanese politician from Fukaya, Saitama. After graduating…Iemitsu Arai (新井 家光, Arai Iemitsu; born 5 May 1955) is a Japanese politician from Fukaya, Saitama. After graduating from Teikyo University, Arai became an orthopedic surgeon. He was elected mayor of Fukaya with the backing of Liberal Democratic Party (LDP) and New Komeito Party (NKP) in 1999. His younger brother Etsuji served as a LDP member of the Diet of Japan.
Takashi Mitsubayashi (三ッ林 隆志, Mitsubayashi Takashi; 5 July 1953 – 2 August 2010) was a Japanese politician of the…Takashi Mitsubayashi (三ッ林 隆志, Mitsubayashi Takashi; 5 July 1953 – 2 August 2010) was a Japanese politician of the Liberal Democratic Party, who served as a member of the House of Representatives in the Diet (national legislature). A native of Satte, Saitama and graduate of Saitama Medical School, he was elected to the House of Representatives for the first time in 2000.
Masakazu Sekiguchi (関口 昌一, Sekiguchi Masakazu; born June 4, 1953) is a Japanese politician of the Liberal Democratic…Masakazu Sekiguchi (関口 昌一, Sekiguchi Masakazu; born June 4, 1953) is a Japanese politician of the Liberal Democratic Party who has served as the President of the Senate since 2024. Born in Saitama Prefecture, Sekiguchi was a dentist and a member of the Saitama Prefectural Assembly before his first election to the Senate in 2003. He served as parliamentary vice minister for Foreign Affairs, senior vice minister for Internal Affairs and Communications and chairman of the LDP caucus in the Senate, before he was elected Senate President in 2024.
Ryuji Koizumi (大塚 拓, Koizumi Ryūji; born 17 September 1952) is a Japanese politician. He has been a member of the House…Ryuji Koizumi (大塚 拓, Koizumi Ryūji; born 17 September 1952) is a Japanese politician. He has been a member of the House of Representatives of Japan from 2000 to 2005 and again from 2009. He served as the Minister of Justice from September 2023 to October 2024.
Makoto Hirayama (平山 誠, Hirayama Makoto; 12 May 1952 – 27 February 2018) is a Japanese politician. He served in the…Makoto Hirayama (平山 誠, Hirayama Makoto; 12 May 1952 – 27 February 2018) is a Japanese politician. He served in the House of Councillors in the Diet (national legislature) from 2009 until 2013.
Yukiko Kada (嘉田 由紀子, Kada Yukiko; born May 18, 1950) is a Japanese politician and member of the National Diet of Japan…Yukiko Kada (嘉田 由紀子, Kada Yukiko; born May 18, 1950) is a Japanese politician and member of the National Diet of Japan, serving as member of the House of Councillors from Shiga Prefecture since 2019. She was the governor of Shiga for two terms from 2006 to 2014.
Fumihiro Himori (日森 文尋 Himori Fumihiro; December 3, 1948 – June 9, 2022) was a Japanese politician and member of the…Fumihiro Himori (日森 文尋 Himori Fumihiro; December 3, 1948 – June 9, 2022) was a Japanese politician and member of the House of Representatives for the Social Democratic Party.
Taimei Yamaguchi (山口 泰明, Yamaguchi Taimei; born 10 November 1948) is a former Japanese politician of the Liberal…Taimei Yamaguchi (山口 泰明, Yamaguchi Taimei; born 10 November 1948) is a former Japanese politician of the Liberal Democratic Party, who served as a member of the House of Representatives in the Diet (national legislature). A native of Hiki District, Saitama and graduate of Nihon University, he was elected to the House of Representatives for the first time in 1996.
Toshio Kayama (加山 俊夫, Kayama Toshio; born 18 February 1945) is a Japanese politician and the former mayor of Sagamihara…Toshio Kayama (加山 俊夫, Kayama Toshio; born 18 February 1945) is a Japanese politician and the former mayor of Sagamihara a designated city in Kanagawa Prefecture, Japan. He was first elected in 2007. He was reelected in 2011 and 2015 but lost his bid for a fourth term in 2019 to Kentaro Motomura.
Kensei Hasegawa (長谷川 憲正, Hasegawa Kensei; born January 1, 1943) is a Japanese politician of the People's New Party, a…Kensei Hasegawa (長谷川 憲正, Hasegawa Kensei; born January 1, 1943) is a Japanese politician of the People's New Party, a member of the House of Councillors in the Diet (national legislature). A native of Kumagaya, Saitama and graduate of the University of Tokyo, he worked at the Ministry of Posts and Telecommunications from 1967 to 2003. He was elected for the first time in 2004.
Toshio Fujii (Japanese: 藤井俊男 Fujii Toshio; 28 September 1942 – 2 January 2026) was a Japanese politician. A member of…Toshio Fujii (Japanese: 藤井俊男 Fujii Toshio; 28 September 1942 – 2 January 2026) was a Japanese politician. A member of the Democratic Party, he served in the House of Councillors from 1998 to 2004. Fujii died of heart failure in Kawaguchi, on 2 January 2026, at the age of 83.
Toshio Yamaguchi (山口 敏夫, Yamaguchi Toshio; born 29 August 1940) is a Japanese politician who served as Minister of…Toshio Yamaguchi (山口 敏夫, Yamaguchi Toshio; born 29 August 1940) is a Japanese politician who served as Minister of Labour and as a member of the House of Representatives in the Diet of Japan. Yamaguchi was first elected to the House of Representatives in the 1967 general election and served ten consecutive terms in the Diet, holding his seat until the 1996 general election. He served as labour minister from 1984 to 1985 in the cabinet of Prime Minister Yasuhiro Nakasone. During his time in the Diet, he frequently appeared in the media and was dubbed the "Ushiwakamaru of politics." In 1994, Yamaguchi persuaded the heads of Tokyo Kyowa Credit Association and Anzen Credit Bank to arrange illegal loans for companies controlled by Yamaguchi and his family. He was arrested in December 1995 and held in prison for a year pending trial. In 1996, he was found guilty of breach of trust, embezzlement, fraud and perjury, and sentenced to four years in prison. He appealed the verdict to the Tokyo High Court, and told reporters in 2002 that he was considering a return to office in 2004; his appeal was rejected in February 2003. He was taken to prison in March 2007 to serve the remaining 3.5 years of his term. Following his release, in 2015, Yamaguchi distributed pamphlets to members of the Diet calling for former Prime Minister Yoshiro Mori to resign as head of the 2020 Summer Olympics organizing committee, causing a stir in the political world as Yamaguchi and Mori had been acquaintances since Mori was still a student. At the age of 75, Yamaguchi entered the 2016 Tokyo gubernatorial election as a candidate of the People's Sovereignty Party (国民主権の会, Kokumin Shuken no Kai). He placed eleventh out of twenty-one candidates.
Toshio Kojima (小島 敏男, Kojima Toshio; born 11 November 1939) is a retired Japanese politician of the Liberal Democratic…Toshio Kojima (小島 敏男, Kojima Toshio; born 11 November 1939) is a retired Japanese politician of the Liberal Democratic Party, who served as a member of the House of Representatives in the Diet (national legislature). A native of Kumagaya, Saitama and graduate of Chuo University, he had served in the city assembly of Kumagaya for three terms since 1971 and in the assembly of Saitama Prefecture for four terms since 1983. He was elected to the House of Representatives for the first time in 1999.
Matsushige Ono (大野 松茂, Ōno Matsushige; 15 January 1936 – 7 August 2026) was a Japanese politician of the Liberal…Matsushige Ono (大野 松茂, Ōno Matsushige; 15 January 1936 – 7 August 2026) was a Japanese politician of the Liberal Democratic Party, who served as a member of the House of Representatives in the Diet (national legislature). A native of Sayama, Saitama and high school graduate, he was elected to the Saitama Prefectural Assembly in 1979 where he served for two terms, and then to be the mayor of his hometown Sayama in 1986, serving for two terms. He was elected to the House of Representatives for the first time in 1996. Ono died from pneumonia on 7 August 2026, at the age of 90.
Michiko Ishii (5 February 1933 – 7 December 2012) was a Japanese politician. Ishii was born on 5 February 1933 and…Michiko Ishii (5 February 1933 – 7 December 2012) was a Japanese politician. Ishii was born on 5 February 1933 and attended the Tokyo College of Pharmacy. She was a member of the Liberal Democratic Party. She served as Minister of the Environment in 1996.
Taneaki Tanami (Japanese: 田並胤明 Tanami Taneaki; 31 October 1932 – 18 March 2026) was a Japanese politician. A member of…Taneaki Tanami (Japanese: 田並胤明 Tanami Taneaki; 31 October 1932 – 18 March 2026) was a Japanese politician. A member of the Japan Socialist Party and the Democratic Party of Japan, he served in the House of Representatives from 1983 to 1993 and again from 2000 to 2003. Tanami died of multiple organ failure in Hanyū, on 18 March 2026, at the age of 93.
Noriyuki Sekine (Japanese: 関根則之 Sekine Noriyuki; 13 January 1931 – 19 June 2022) was a Japanese politician. A member of…Noriyuki Sekine (Japanese: 関根則之 Sekine Noriyuki; 13 January 1931 – 19 June 2022) was a Japanese politician. A member of the Liberal Democratic Party, he served in the House of Councillors from 1991 to 1998. Sekine died in Kawagoe, Saitama on 19 June 2022 at the age of 91.
Toshio Masuda (増田 敏男, Masuda Toshio; born 20 April 1929) is a retired Japanese politician who served as a member of the…Toshio Masuda (増田 敏男, Masuda Toshio; born 20 April 1929) is a retired Japanese politician who served as a member of the House of Representatives.
Isamu Ihara (井原 勇, Ihara Isamu; 17 November 1926 – 7 October 2007) was a Japanese politician. He was the last mayor of…Isamu Ihara (井原 勇, Ihara Isamu; 17 November 1926 – 7 October 2007) was a Japanese politician. He was the last mayor of Yono, Saitama. After graduating from the University of Tokyo, Ihara joined Niigata Engineering in 1950. He was appointed as treasurer of Yono in April 1979. Ihara won in the mayoral election held in April 1983, succeeding Saburō Shiratori, who had governed Yono for 24 years. He served as mayor for 18 years until the city of Yono was dissolved to form the city of Saitama on 1 May 2001. He also served as acting mayor of Saitama until Sōichi Aikawa was elected as its first mayor on 27 May 2001. Ihara did not run in the mayoral election to maintain neutrality. Ihara died of pneumonia at age 80. A statue of him was built at the ward office of Chūō to honor him in 2008.
Yawara Hata (畑和, Hata Yawara; 29 September 1910 – 26 January 1996) was a Japanese politician, who served as a member of…Yawara Hata (畑和, Hata Yawara; 29 September 1910 – 26 January 1996) was a Japanese politician, who served as a member of the House of Representatives and a governor of Saitama Prefecture. In 1993 he received the highest distinction of the Scout Association of Japan, the Golden Pheasant Award.
Seijuro Arafune (荒舩 清十郎, Arafune Seijūrō; 9 March 1907 – 25 November 1980) was a Japanese politician and a Minister of…Seijuro Arafune (荒舩 清十郎, Arafune Seijūrō; 9 March 1907 – 25 November 1980) was a Japanese politician and a Minister of Transport. He was a member of Liberal Democratic Party. Arafune resigned the Minister of Transport 1966 after a political scandal where he had taken two businessmen with him on a trip paid for by the Japanese govermnement, and ordered the National Railways to create an express stop in his home town.