Saitama at-large district

is a four-member constituency of the House of Councillors, the upper house of the national Diet of Japan. It consists of Saitama and elects four Councillors for six-year terms every three years by single non-transferable vote.

Until a reapportionment in the 1990s, effective in the 1995 and 1998 Councillors elections, Saitama was a two-member district electing a total of four Councillors. Then again in 2018, the district had its fixed seat count increased from a total of six Councillors to eight Councillors. The new seats were filled in the 2019 and 2022 House of Councillors elections.

Overview The constituency represents the entire population of Saitama Prefecture. The district elects eight Councillors to six-year terms, four each at alternating elections held every three years. The district has 6,127,388 registered voters as of July 2025. The Councillors currently representing Saitama are: Masakazu Sekiguchi (Liberal Democratic Party (LDP), fifth term; term ends in 2028) Sekiguchi has served as President of the House of Councillors since November 2024 and sits as an independent as a result. Kiyoshi Ueda (Democratic Party For the People (DPFP), second term; term ends in 2028) Makoto Nishida (Komeito, fourth term; term ends in 2028) Mari Takagi (Constitutional Democratic Party of Japan (CDP), first term; term ends in 2028) Toshiharu Furukawa (LDP, fourth term; term ends in 2031) Kumiko Ehara (DPFP, first term; term ends in 2031) Hiroto Kumagai (CDP, second term; term ends in 2031) Tsutomu Ōtsu (Sanseitō, first term; term ends in 2031)

Elected Councillors +Class of 1947/1953/...Election yearClass of 1950/1956/...#1 (1947: #1. 6 Year Term)#2 (1947: #2, 6 Year Term)(1992: #3, 3 Year Term)#3#4#1 (1947: #3, 3-year term)#2 (1947: #4, 3-year term)#3#4Eizo Kobayashi(LP)Yataro Hiranuma(LP)1947Katsumasa Amada(JSP)Kazue Ishikawa(DP)1950Yoshio Matsunaga(JSP)Shokichi Uehara(LP)Eizo Kobayashi(Yoshida LP)Katsumasa Amada(Right JSP)19531955 by el.Ryusaku Endo(Ind.)1956Yuichi Osawa(LDP)Shokichi Uehara(LDP)Eizo Kobayashi(LDP)Katsumasa Amada(JSP)19591960 by el.Kanzo Oizumi(LDP)1962Shokichi Uehara(LDP)Hideyuki Seya (JSP)Katsuji Mori(JSP)Yoshio Tsuchiya(LDP)19651968Yoshio Tsuchiya(LDP)Katsuji Mori(JSP)19711974Hideyuki Seya(JSP)Shokichi Uehara(LDP)Juro Morita(NLC)19771980Ryoko Nao(LDP)Hideyuki Seya(JSP)19831986Hideyuki Seya(JSP)Ryoko Nao(LDP)Hajime Fukuda(JSP)Yoshio Tsuchiya(Ind.)1989Taizo Sato(LDP)1991 by-el.Noriyuki Sekine(LDP)1992 (including by-el.)Noriyuki Sekine(LDP)Hideyuki Seya(JSP)Hiroshi Takano(NFP)Sachiyo Abe(JCP)19951998Takujiro Hamada(Ind.)Renzo Togashi(JCP)Toshio Fuji(DPJ)Taizo Sato(LDP)Hiroshi Takano(Komeito)Ryuji Yamane(DPJ)20012003 by-el.Masakazu Sekiguchi(LDP)2004Chiyako Shimada(DPJ)Masakazu Sekiguchi(LDP)Makoto Nishida(Komeito)Kuniko Koda(DPJ)Toshiharu Furukawa(LDP)20072010Masakazu Sekiguchi(LDP)Makoto Nishida(Komeito)Motohiro Ōno(DPJ)Toshiharu Furukawa(LDP)Katsuo Yakura(Komeito)Kuniko Koda (Your Party)20132016Motohiro Ōno(DPJ)Makoto Nishida(Komeito)Hiroto Kumagai(CDP)Katsuo Yakura(Komeito)Gaku Ito(JCP)20192019 by-el.Kiyoshi Ueda(Ind.)2022Mari Takagi(CDP)Kumiko Ehara(DPFP)Tsutomu Ōtsu(Sanseitō)2025 Party affiliations as of election day.

Election results

Elections in the 2020s

|colspan=2|Communist |align=right|0 |align=right|0 |align=right|1 |- |- style="background-color:#E9E9E9" ! colspan="3" style="text-align:right;" |Total |align=right|4 |align=right|8 |align=right|N/A

Elections in the 2010s

Elections in the 2000s

References

Saitama at-large district

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