Saitama at-large district
| Saitama at-large district | |
|---|---|
| 埼玉県選挙区 | |
| Parliamentary constituency for the House of Councillors | |
 | |
| Prefecture | Saitama |
| Electorate | 6,127,388 (as of July 2025)[1] |
| Current constituency | |
| Created | 1947 |
| Seats | 8 |
| Councillors | Class of 2028:
|
Saitama at-large district (埼玉県選挙区, Saitama-ken senkyoku) 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.[2] 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.[1] The Councillors currently representing Saitama are:[3]
- Masakazu Sekiguchi (Liberal Democratic Party (LDP), fifth term; term ends in 2028)[4]
- 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)[5]
- Makoto Nishida (Komeito, fourth term; term ends in 2028)[6]
- Mari Takagi (Constitutional Democratic Party of Japan (CDP), first term; term ends in 2028)[7]
- Toshiharu Furukawa (LDP, fourth term; term ends in 2031)[8]
- Kumiko Ehara (DPFP, first term; term ends in 2031)[9]
- Hiroto Kumagai (CDP, second term; term ends in 2031)[10]
- Tsutomu Ōtsu (Sanseitō, first term; term ends in 2031)[11]
Elected Councillors
| Class of 1947/1953/... | Election year | Class of 1950/1956/... | ||||||
|---|---|---|---|---|---|---|---|---|
| #1
(1947: #1. 6 Year Term) |
#2
(1947: #2, 6 Year Term) |
#3 | #4 | #1
(1947: #3, 3-year term) |
#2
(1947: #4, 3-year term) |
#3 | #4 | |
| Eizo Kobayashi (LP) |
Yataro Hiranuma (LP) |
1947 | Katsumasa Amada (JSP) |
Kazue Ishikawa (DP) |
||||
| 1950 | Yoshio Matsunaga (JSP)[note 1] |
Shokichi Uehara (LP) | ||||||
| Eizo Kobayashi (Yoshida LP) |
Katsumasa Amada (Right JSP) |
1953 | ||||||
| 1955 by el. | Ryusaku Endo (Ind.) | |||||||
| 1956 | Yuichi Osawa (LDP)[note 2] |
Shokichi Uehara (LDP) | ||||||
| Eizo Kobayashi (LDP) |
Katsumasa Amada (JSP)[note 3] |
1959 | ||||||
| 1960 by el. | Kanzo Oizumi (LDP) | |||||||
| 1962 | Shokichi Uehara (LDP) |
Hideyuki Seya
(JSP) | ||||||
| Katsuji Mori (JSP) |
Yoshio Tsuchiya (LDP) |
1965 | ||||||
| 1968 | ||||||||
| Yoshio Tsuchiya (LDP) |
Katsuji Mori (JSP) |
1971 | ||||||
| 1974 | Hideyuki Seya (JSP) |
Shokichi Uehara (LDP) | ||||||
| Juro Morita (NLC) |
1977 | |||||||
| 1980 | Ryoko Nao (LDP) |
Hideyuki Seya (JSP) | ||||||
| 1983 | ||||||||
| 1986 | Hideyuki Seya (JSP) |
Ryoko Nao (LDP) | ||||||
| Hajime Fukuda (JSP) |
Yoshio Tsuchiya (Ind.)[note 4] |
1989 | ||||||
| Taizo Sato (LDP) |
1991 by-el. | Noriyuki Sekine (LDP) | ||||||
| 1992 (including
by-el.) |
Noriyuki Sekine (LDP) |
Hideyuki Seya (JSP) | ||||||
| Hiroshi Takano (NFP) |
Sachiyo Abe (JCP) |
1995 | ||||||
| 1998 | Takujiro Hamada (Ind.)[note 5] |
Renzo Togashi (JCP) |
Toshio Fuji (DPJ) | |||||
| Taizo Sato (LDP) |
Hiroshi Takano (Komeito) |
Ryuji Yamane (DPJ) |
2001 | |||||
| 2003 by-el. | Masakazu Sekiguchi (LDP) | |||||||
| 2004 | Chiyako Shimada (DPJ) |
Masakazu Sekiguchi (LDP) |
Makoto Nishida (Komeito) | |||||
| Kuniko Koda (DPJ) |
Toshiharu Furukawa (LDP) |
2007 | ||||||
| 2010 | Masakazu Sekiguchi (LDP) |
Makoto Nishida (Komeito) |
Motohiro Ōno (DPJ) | |||||
| Toshiharu Furukawa (LDP) |
Katsuo Yakura (Komeito) |
Kuniko Koda (Your Party) |
2013 | |||||
| 2016 | Motohiro Ōno (DPJ)[note 6] |
Makoto Nishida (Komeito) | ||||||
| Hiroto Kumagai (CDP) |
Katsuo Yakura (Komeito) |
Gaku Ito (JCP) |
2019 | |||||
| 2019 by-el. | Kiyoshi Ueda (Ind.)[note 7] | |||||||
| 2022 | Mari Takagi (CDP) | |||||||
| Kumiko Ehara (DPFP) |
Tsutomu Ōtsu (Sanseitō) |
2025 | ||||||
Party affiliations as of election day.
- ↑ Died in 1955 while in office
- ↑ Resigned to run in 1960 Saitama gubernatorial election
- ↑ Died in 1965 while in office
- ↑ Resigned to run in 1992 Saitama gubernatorial election
- ↑ Resigned to run in 2003 Saitama gubernatorial election
- ↑ Resigned to run in 2019 Saitama gubernatorial election
- ↑ Joined Democratic Party For the People in September 2025[12]
Election results
Elections in the 2020s
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| LDP | Toshiharu Furukawa | 573,114 | 16.78 |  7.29 | |
| DPP | Kumiko Ehara | 535,706 | 15.69 | new | |
| CDP | Hiroto Kumagai | 480,330 | 14.06 | 0.65 | |
| Sanseitō | Tsutomu Ōtsu | 465,278 | 13.62 |  10.65 | |
| Komeito (LDP) | Katsuo Yakura | 441,613 | 12.93 | 2.85 | |
| JCP | Gaku Itō | 227,488 | 6.66 | 1.18 | |
| Reiwa | Nanae Sakurai | 198,936 | 5.82 | 1.79 | |
| Ishin | Miyumi Ryūno | 150,475 | 4.41 | 6.33 | |
| CPJ | Tetsunobu Ishihama | 129,130 | 3.78 | new | |
| Team Mirai | Kazuko Mutō | 83,957 | 2.46 | new | |
| Social Democratic | Tamaki Takai | 50,335 | 1.47 | ||
| Anti-NHK | Shinichi Yamada | 26,469 | 0.78 |  | |
| Shinseikai | Yūka Masuyama | 25,312 | 0.74 | new | |
| Independent | Yoshihide Saitō | 19,190 | 0.56 | new | |
| Reform Party | Daisaku Tsumura | 7,992 | 0.23 | new | |
| Turnout | 56.88 | 6.63 | |||
| Registered electors | 6,127,388 | 18,684 | |||
| Party total seats | Won | Total | Change | ||
| Liberal Democratic | 1 | 2 | | ||
| Constitutional Democratic | 1 | 2 | | ||
| Democratic Party For the People | 1 | 1 | 1 | ||
| Sanseitō | 1 | 1 | 1 | ||
| Kōmeitō | 0 | 1 | 1 | ||
| Independent | 0 | 1 | | ||
| Communist | 0 | 0 | 1 | ||
| Total | 4 | 8 | N/A | ||
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| LDP | Masakazu Sekiguchi | 727,232 | 24.1 | ||
| Independent | Kiyoshi Ueda (endorsed by DPFP) |
501,820 | 16.6 | ||
| Komeito | Makoto Nishida (endorsed by LDP) |
476,642 | 15.8 | ||
| CDP | Mari Takagi | 444,567 | 14.7 | ||
| Ishin | Takeyoshi Kaku | 324,476 | 10.7 | ||
| JCP | Saeko Umemura | 236,899 | 7.8 | ||
| Reiwa | Miyuka Nishi | 121,769 | 4.0 | ||
| Sanseito | Hitoshi Sakaue | 89,693 | 3.0 | ||
| Independent | Yasushi Takahashi | 22,613 | 0.7 | ||
| Anti-NHK | Yūsuke Kawai | 18,194 | 0.6 | ||
| Happiness Realization | Yūko Minato | 15,389 | 0.5 | ||
| Anti-NHK | Hiroshi Kobayashi | 13,966 | 0.5 | ||
| Anti-NHK | Naoki Miyagawa | 12,279 | 0.4 | ||
| Japan First | Sasami Horikiri | 8,588 | 0.3 | ||
| Anti-NHK | Takao Ike | 7,178 | 0.2 | ||
| Turnout | 50.25 | ||||
Elections in the 2010s
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Independent | Kiyoshi Ueda | 1,065,390 | 86.4 | ||
| Anti-NHK | Takashi Tachibana | 168,289 | 13.6 | ||
| Turnout | 20.81 | ||||
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| LDP | Toshiharu Furukawa | 786,479 | 28.2 | ||
| CDP | Hiroto Kumagai | 536,338 | 19.3 | ||
| Komeito | Katsuo Yakura (endorsed by LDP) |
532,302 | 19.1 | ||
| JCP | Gaku Itō | 359,297 | 12.9 | ||
| DPP | Chie Shishido | 244,399 | 8.8 | ||
| Ishin | Ryō Sawada | 204,075 | 7.3 | ||
| Anti-NHK | Erii Satō | 80,741 | 2.9 | ||
| Consideration the Euthanasia System | Ryōji Samejima | 21,153 | 0.8 | ||
| Happiness Realization | Ichirō Kojima | 19,515 | 0.7 | ||
| Turnout | 46.48 | ||||
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| LDP | Masakazu Sekiguchi | 898,827 | 29.2 | ||
| Democratic | Motohiro Ōno (endorsed by PLP) |
676,828 | 22.0 | ||
| Komeito | Makoto Nishida (endorsed by LDP) |
642,597 | 20.9 | ||
| JCP | Gaku Itō (endorsed by PLP) |
486,778 | 15.8 | ||
| Ishin | Ryō Sawada (endorsed by Genzei Nippon) |
228,472 | 7.4 | ||
| Japanese Kokoro | Tomoko Sasaki | 118,030 | 3.8 | ||
| Happiness Realization | Ichirō Kojima | 27,283 | 0.9 | ||
| Turnout | 51.94 | ||||
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| LDP | Toshiharu Furukawa | 1,000,725 | 34.05 | ||
| Komeito | Katsuo Yakura | 599,755 | 20.41 | ||
| Your | Kuniko Kōda | 485,559 | 16.52 | ||
| Democratic | Ryūji Yamane | 389,625 | 13.26 | ||
| JCP | Gaku Itō | 353,594 | 12.03 | ||
| Social Democratic | Yasumasa Kawakami | 65,749 | 2.24 | ||
| Happiness Realization | Miho Tanii | 22,345 | 0.76 | ||
| Association for Creating Saitama's Future | Teruhiko Mayanaga | 21,358 | 0.73 | ||
| Turnout | 51.21 | ||||
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| LDP | Masakazu Sekiguchi | 655,028 | 20.6 | ||
| Kōmeitō | Makoto Nishida | 594,678 | 18.7 | ||
| DPJ | Motohiro Ōno | 557,398 | 17.5 | ||
| DPJ | Chiyako Shimada | 544,381 | 17.1 | ||
| YP | Tsukasa Kobayashi | 416,663 | 13.1 | ||
| JCP | Gaku Itō | 207,957 | 6.5 | ||
| NRP | Kōji Nakagawa | 84,897 | 2.7 | ||
| SDP | Fumihiro Himori | 72,185 | 2.3 | ||
| Independent | Kōsei Hasegawa | 37,731 | 1.2 | ||
| HRP | Hirotoshi Inda | 9,536 | 0.3 | ||
| Turnout | 3,246,247 | 55.83 | |||
Elections in the 2000s
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| DPJ | Kuniko Kōda | 745,517 | 23.5 | ||
| LDP | Toshiharu Furukawa | 684,270 | 21.6 | ||
| DPJ | Ryūji Yamane | 665,063 | 21.0 | ||
| Kōmeitō | Hiroshi Takano | 623,723 | 19.7 | ||
| JCP | Sumiko Ayabe | 277,440 | 8.7 | ||
| SDP | Etsuko Matsuzawa | 104,403 | 3.3 | ||
| PNP | Tetsuo Sawada | 72,756 | 2.3 | ||
| Turnout | 3,227,638 | 56.35 | |||
References
- 1 2 3 埼玉選挙区 - 第27回参議院議員選挙 2025年（参議院議員通常選挙）2025年07月20日投票 | 選挙ドットコム [Saitama Electoral District - 27th House of Councillors Election 2025 (Regular Election for House of Councillors) Voting on July 20, 2025 | Senkyo.com]. 選挙ドットコム [Senkyo.com] (in Japanese). Ichini Inc. Retrieved 2026-03-06.
- ↑ 参議院議員選挙制度の変遷 [Evolution of the House of Councillors Electoral System] (in Japanese). House of Councillors. Retrieved 2026-04-04.
- ↑ 選挙区・比例代表別議員一覧：議員情報：参議院 [List of Representatives by Electoral District and Proportional Representation: Member Information: House of Councillors] (in Japanese). House of Councillors, The National Diet of Japan. 2026-02-16. Retrieved 2026-04-04.
- ↑ "Mr. SEKIGUCHI Masakazu". House of Councillors, The National Diet of Japan. Retrieved 2026-04-04.
- ↑ "Mr. UEDA Kiyoshi". House of Councillors, The National Diet of Japan. Retrieved 2026-04-04.
- ↑ "Mr. NISHIDA Makoto". House of Councillors, The National Diet of Japan. Retrieved 2026-04-04.
- ↑ "Ms. TAKAGI Mari". House of Councillors, The National Diet of Japan. Retrieved 2026-04-04.
- ↑ "Mr. FURUKAWA Toshiharu". House of Councillors, The National Diet of Japan. Retrieved 2026-04-04.
- ↑ "Ms. EHARA Kumiko". House of Councillors, The National Diet of Japan. Retrieved 2026-04-04.
- ↑ "Mr. KUMAGAI Hiroto". House of Councillors, The National Diet of Japan. Retrieved 2026-04-04.
- ↑ "Mr. OHTSU Tsutomu". House of Councillors, The National Diet of Japan. Retrieved 2026-04-04.
- ↑ 上田清司参議院議員が国民民主党に入党 | 新・国民民主党 - つくろう、新しい答え。 [House of Councillors member Kiyoshi Ueda joins the Democratic Party For the People | New Democratic Party for the People – Let's create new answers.] (in Japanese). Democratic Party For the People. 2025-09-16. Retrieved 2026-03-08.
- ↑ 埼玉 参議院選挙結果・開票速報 参院選2022 - NHK [Saitama: House of Councillors Election Results & Vote Count Updates — 2022 Upper House Election — NHK] (in Japanese). NHK. 2022-07-11. Retrieved 2026-04-09.
- ↑ 参議院議員補欠選挙（埼玉選挙区） [House of Councillors By-election (Saitama Electoral District)]. Senkyo.com (in Japanese). Ichini Inc. Retrieved 2026-04-10.
- ↑ 埼玉 選挙区 | 参院選 2019 | NHK選挙WEB [Saitama Electoral District | 2019 House of Councillors Election | NHK Election Web] (in Japanese). NHK. 2019-07-22. Retrieved 2026-04-09.
- ↑ 選挙区 埼玉|2016参院選 | 参議院選挙 | 選挙アーカイブス | NHK選挙WEB [Electoral District: Saitama | 2016 Upper House Election | House of Councillors Election | Election Archives | NHK Election WEB] (in Japanese). NHK. 2016-07-10. Retrieved 2026-04-10.
- ↑ 埼玉選挙区 - 第23回参議院議員選挙（参議院議員通常選挙）2013年07月21日投票 | 選挙ドットコム [Saitama Electoral District — The 23rd House of Councillors Election (Regular Election) | Voting Date: July 21, 2013 | Senkyo.com]. Senkyo.com (in Japanese). Ichini, Inc. Retrieved 2026-04-10.
- ↑ 参議院>第22回参議院議員選挙>埼玉選挙区. go2senkyo.com ザ･選挙 (in Japanese). Voice Japan. Retrieved 2012-02-02.
- ↑ 参議院>第21回参議院議員選挙>埼玉選挙区. go2senkyo.com ザ･選挙 (in Japanese). Voice Japan. Retrieved 2012-02-02.