# Chiba at-large district

The Chiba at-large district (Japanese: 千葉県選挙区, Hepburn: Chiba-ken senkyoku) is a constituency that represents Chiba Prefecture in the House of Councillors in the Diet of Japan. It has six Councillors in the 242-member house.

## Outline

The constituency represents the entire population of Chiba Prefecture. The district elects six Councillors to six-year terms, two sets of three each at alternating elections held every three years. Prior to the 2007 election the district elected four Councilors in two sets of two. The district has 5,092,741 registered voters as of September 2015. The Councillors currently representing Chiba are:
* Kuniko Inoguchi (Liberal Democratic Party (LDP), first term; term ends in 2016)
* Hiroyuki Konishi (Democratic Party, first term; term ends in 2016)
* Kenichi Mizuno (Democratic Party, first term; term ends in 2016)
* Junichi Ishii (LDP, second term; term ends in 2019)
* Hiroyuki Nagahama (Democratic Party, second term; term ends in 2019)
* Toshiro Toyoda (LDP, first term; term ends in 2019)

## Elected Councillors

| Class of 1947 | Class of 1947 | Class of 1947 | election year | Class of 1950 (3-year term in 1947) | Class of 1950 (3-year term in 1947) | Class of 1950 (3-year term in 1947) |
| - | Akira Ono (Ind.) | Hisashi Yamazaki (Ind.) | 1947 | Yoshiaki Tamaya (Liberal) | Ichiro Asai (Democratic) | - |
| - | Akira Ono (Ind.) | Hisashi Yamazaki (Ind.) | 1950 | Kinsuke Kanō (Liberal) | Toshizō Tsuchiya (Liberal) | - |
| - | Akira Ono (Ind.) | Hisashi Yamazaki (Ind.) | 1950 by-election | Kinsuke Kanō (Liberal) | Fumie Kataoka (Social Democratic) | - |
| - | Kan Kase (Ind.) | Tamenosuke Kawaguchi (Liberal) | 1953 | Kinsuke Kanō (Liberal) | Fumie Kataoka (Social Democratic) | - |
| - | Kan Kase (Ind.) | Tamenosuke Kawaguchi (Liberal) | 1954 by-election | Shigejiro Inō (Liberal) | Fumie Kataoka (Social Democratic) | - |
| - | Kan Kase (Ind.) | Tamenosuke Kawaguchi (Liberal) | 1956 | Shigejirō Inō (LDP) | Fumie Kataoka (Social Democratic) | - |
| - | Kan Kase (Social Democratic) | Kyūtarō Ozawa (LDP) | 1959 | Shigejirō Inō (LDP) | Fumie Kataoka (Social Democratic) | - |
| - | Kan Kase (Social Democratic) | Kyūtarō Ozawa (LDP) | 1960 by-election | Yoshio Kijima (LDP) | Fumie Kataoka (Social Democratic) | - |
| - | Kan Kase (Social Democratic) | Kyūtarō Ozawa (LDP) | 1962 | Yoshio Kijima (LDP) | Akio Yanaoka (Social Democratic) | - |
| - | Kan Kase (Social Democratic) | Kyūtarō Ozawa (LDP) | 1965 | Yoshio Kijima (LDP) | Akio Yanaoka (Social Democratic) | - |
| - | Kan Kase (Social Democratic) | Gisaku Sugeno (LDP) | 1967 by-election | Yoshio Kijima (LDP) | Akio Yanaoka (Social Democratic) | - |
| - | Kan Kase (Social Democratic) | Gisaku Sugeno (LDP) | 1968 | Yoshio Kijima (LDP) | Ichitaro Watanabe (LDP) | - |
| - | Kan Kase (Social Democratic) | Gisaku Sugeno (LDP) | 1971 | Yoshio Kijima (LDP) | Ichitaro Watanabe (LDP) | - |
| - | Kan Kase (Social Democratic) | Gisaku Sugeno (LDP) | 1974 | Takayoshi Takahashi (LDP) | Misao Akagiri (Social Democratic) | - |
| - | Kan Kase (Social Democratic) | Gisaku Sugeno (LDP) | 1977 | Takayoshi Takahashi (LDP) | Misao Akagiri (Social Democratic) | - |
| - | Kan Kase (Social Democratic) | Gisaku Sugeno (LDP) | 1980 | Yutaka Inoue (LDP) | Misao Akagiri (Social Democratic) | - |
| - | Kan Kase (Social Democratic) | Sōichi Usui (LDP) | 1981 by-election | Yutaka Inoue (LDP) | Misao Akagiri (Social Democratic) | - |
| - | Yaeko Itohisa (Social Democratic) | Hiroyuki Kurata (LDP) | 1983 | Yutaka Inoue (LDP) | Misao Akagiri (Social Democratic) | - |
| - | Yaeko Itohisa (Social Democratic) | Hiroyuki Kurata (LDP) | 1986 | Yutaka Inoue (LDP) | Misao Akagiri (Social Democratic) | - |
| - | Yaeko Itohisa (Social Democratic) | Hiroyuki Kurata (LDP) | 1989 | Yutaka Inoue (LDP) | Misao Akagiri (Social Democratic) | - |
| - | Yaeko Itohisa (Social Democratic) | Hiroyuki Kurata (LDP) | 1992 | Yutaka Inoue (LDP) | Misao Akagiri (Social Democratic) | - |
| - | Ryōzō Iwase (New Frontier) | Hiroyuki Kurata (LDP) | 1995 | Yutaka Inoue (LDP) | Misao Akagiri (Social Democratic) | - |
| - | Ryōzō Iwase (New Frontier) | Hiroyuki Kurata (LDP) | 1998 | Yutaka Inoue (LDP) | Wakako Hironaka (Ind.) | - |
| - | Akira Imaizumi (DPJ) | Hiroyuki Kurata (LDP) | 2001 | Yutaka Inoue (LDP) | Wakako Hironaka (Ind.) | - |
| - | Akira Imaizumi (DPJ) | Hiroyuki Kurata (LDP) | 2002 by-election | Kazuyasu Shiina (LDP) | Wakako Hironaka (Ind.) | - |
| - | Akira Imaizumi (DPJ) | Hiroyuki Kurata (LDP) | 2004 | Kazuyasu Shiina (LDP) | Wakako Hironaka (DPJ) | - |
| Ken Kagaya (DPJ) | Hiroyuki Nagahama (DPJ) | Junichi Ishii (LDP) | 2007 | Kazuyasu Shiina (LDP) | Wakako Hironaka (DPJ) | - |
| Ken Kagaya (DPJ) | Hiroyuki Nagahama (DPJ) | Junichi Ishii (LDP) | 2010 | Hiroyuki Konishi (DPJ) | Kuniko Inoguchi (LDP) | Kenichi Mizuno (Your Party) |
| Junichi Ishii (LDP) | Toshirō Toyoda (LDP) | Hiroyuki Nagahama (DPJ) | 2013 | Hiroyuki Konishi (DPJ) | Kuniko Inoguchi (LDP) | Kenichi Mizuno (Your Party) |
| Junichi Ishii (LDP) | Toshirō Toyoda (LDP) | Hiroyuki Nagahama (DPJ) | 2016 | Kuniko Inoguchi (LDP) | Taichirō Motoe (LDP) | Hiroyuki Konishi (DPJ) |
| Junichi Ishii (LDP) | Hiroyuki Nagahama (CDP) | Toshirō Toyoda (LDP) | 2019 | Kuniko Inoguchi (LDP) | Taichirō Motoe (LDP) | Hiroyuki Konishi (DPJ) |
| Junichi Ishii (LDP) | Hiroyuki Nagahama (CDP) | Toshirō Toyoda (LDP) | 2022 | Shoichi Usui (LDP) | Kuniko Inoguchi (LDP) | Hiroyuki Konishi (CDP) |
* ↑ Later joined Ryokufūkai'"`UNIQ--ref-0000002A-QINU`"'
* ↑ Later joined Kaishintō'"`UNIQ--ref-0000002C-QINU`"'
* ↑ Died in office 5 December 1953'"`UNIQ--ref-0000002E-QINU`"'
* ↑ Died in office 6 November 1950'"`UNIQ--ref-00000030-QINU`"'
* ↑ Held 13 December 1950'"`UNIQ--ref-00000032-QINU`"'
* ↑ Joined the Leftist Socialist Party then the Social Democratic Party during his first term
* ↑ Held 20 January 1954'"`UNIQ--ref-00000035-QINU`"'
* ↑ Resigned 27 October 1960'"`UNIQ--ref-00000037-QINU`"'
* ↑ Died in office 18 September 1967'"`UNIQ--ref-00000039-QINU`"'
* ↑ Held 1 December 1960'"`UNIQ--ref-0000003B-QINU`"'
* ↑ Died in office 25 January 1981'"`UNIQ--ref-0000003D-QINU`"'
* ↑ Held 5 November 1967'"`UNIQ--ref-0000003F-QINU`"'
* ↑ Resigned 8 May 2002'"`UNIQ--ref-00000041-QINU`"'
* ↑ Held 8 March 1981'"`UNIQ--ref-00000043-QINU`"'
* ↑ Joined the DPJ after the election
* ↑ Held 27 October 2002'"`UNIQ--ref-00000046-QINU`"'

## Election results

2022 :
| Party | Party | Candidate | Votes | % |
| | LDP | Shoichi Usui (Endorsed by Komeito) | 656,952 | 25.85 |
| | LDP | Kuniko Inoguchi (Endorsed by Komeito) | 587,809 | 23.13 |
| | CDP | Hiroyuki Konishi (Endorsed by the SDP's Chiba branch) | 473,175 | 18.62 |
| | Ishin | Masato Sano | 251,416 | 9.89 |
| | JCP | Kazuko Saito | 194,475 | 7.65 |
| | Democratic Party for the People | Hirokazu Isobe | 161,648 | 6.36 |
| | Sanseitō | Ryota Shiina | 86,147 | 3.39 |
| | Anti-NHK | Noriko Nakamura | 28,295 | |
| | Happiness Realization | Hiroko Nanami | 22,834 | 0.9 |
| | Liberal Republican Party | Sakurako Uda | 18,791 | 0.74 |
| | New Party Kunimori | Mari Azusa | 18,329 | 0.72 |
| | Anti-NHK | Nobuhiro Watanabe | 17,511 | 0.69 |
| | Anti-NHK | Ryo Sudara | 13,016 | 0.51 |
| | Japan First | Megumi Kiuchi | 10,922 | 0.43 |
| Turnout | Turnout | Turnout | 2,705,602 | 50.01 |
| Total valid votes | Total valid votes | Total valid votes | 2,607,139# | 96.36 |
| Rejected ballots | Rejected ballots | Rejected ballots | 98,463 | 3.64 |
| | LDP hold | LDP hold | LDP hold | LDP hold |
| | LDP hold | LDP hold | LDP hold | LDP hold |
| | CDP gain from Democratic | CDP gain from Democratic | CDP gain from Democratic | CDP gain from Democratic |
2019 :
| Party | Party | Candidate | Votes | % |
| | LDP | Kuniko Inoguchi (Endorsed by Komeito) | 698,993 | 30.54 |
| | CDP | Hiroyuki Nagahama (Endorsed by the DPP and the SDP) | 661,224 | 28.89 |
| | LDP | Toshiro Toyoda (Endorsed by Komeito) | 436,182 | 19.06 |
| | JCP | Fumiko Asano | 359,854 | 15.72 |
| | Anti-NHK | Masayuki Hiratsuka | 89,941 | 3.93 |
| | Euthanasia Party | Masanori Kadota | 42,643 | 1.86 |
| Turnout | Turnout | Turnout | 2,374,919 | 45.28 |
| Total valid votes | Total valid votes | Total valid votes | 2,288,837 | 96.37 |
| Rejected ballots | Rejected ballots | Rejected ballots | 86,082 | 3.63 |
| | LDP hold | LDP hold | LDP hold | LDP hold |
| | CDP gain from LDP | CDP gain from LDP | CDP gain from LDP | CDP gain from LDP |
| | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic |
2016 :
| Party | Party | Candidate | Votes | % |
| | LDP | Kuniko Inoguchi | 760,093 | 29.15 |
| | LDP | Taichirō Motoe | 577,392 | 22.15 |
| | Democratic | Hiroyuki Konishi | 472,219 | 18.11 |
| | JCP | Fumiko Asano | 359,854 | 15.72 |
| | Democratic | Kenichi Mizuno | 314,670 | 12.07 |
| | Independent | Masao Takahashi | 57,329 | 2.20 |
| | Japanese Kokoro | Naritomo Katori | 50,098 | 1.92 |
| | Happiness Realization | Yuzo Furukawa | 23,777 | 0.91 |
| Registered electors | Registered electors | Registered electors | 5,201,477 | |
| Turnout | Turnout | Turnout | 2,705,602 | 52.02 |
| Total valid votes | Total valid votes | Total valid votes | 2,607,139 | 96.36 |
| Rejected ballots | Rejected ballots | Rejected ballots | 98,463 | 3.64 |
| | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic |
| | LDP hold | LDP hold | LDP hold | LDP hold |
| | Democratic gain from Your | Democratic gain from Your | Democratic gain from Your | Democratic gain from Your |
2013 :
| Party | Party | Candidate | Votes | % |
| | LDP | Junichi Ishii (endorsed by Komeito) | 680,706 | 28.5 |
| | LDP | Toshiro Toyoda (endorsed by Komeito) | 418,806 | 17.5 |
| | Democratic | Hiroyuki Nagahama | 388,529 | 16.3 |
| | Your | Masahiro Terada | 285,007 | 11.9 |
| | JCP | Satoshi Terao | 232,477 | 9.7 |
| | Restoration | Hiroki Hanazaki | 186,259 | 7.8 |
| | People's Life | Kazumi Ota | 148,240 | 6.2 |
| | Ishin Seito Shimpu | Yuichi Watanabe | 39,147 | 1.6 |
| | Happiness Realization | Hironori Matsushima | 9,227 | 0.4 |
| Turnout | Turnout | Turnout | | |
2010 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Hiroyuki Konishi (endorsed by People's New Party) | 35,632 | 20.2 |
| | LDP | Kuniko Inoguchi | 513,772 | 19.3 |
| | Your | Kenichi Mizuko | 476,259 | 17.9 |
| | Democratic | Ayumi Michi | 463,648 | 17.4 |
| | LDP | Kazuyasu Shiina | 395,746 | 14.9 |
| | JCP | Kazuko Saito | 163,803 | 6.2 |
| | New Renaissance | Hisashi Koga | 66,384 | 2.5 |
| | Sunrise | Satoshi Shimizu | 29,926 | 1.1 |
| | Happiness Realization | Masahiko Makino | 12,669 | 0.5 |
| Turnout | Turnout | Turnout | | |
2007 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Hiroyuki Nagahama | 666,241 | 25.2 |
| | LDP | Junichi Ishii (endorsed by Komeito) | 541,701 | 20.5 |
| | Democratic | Ken Kagaya | 477,402 | 18.1 |
| | LDP | Takaki Shirasuka (endorsed by Komeito) | 387,395 | 14.7 |
| | JCP | Fumiko Asano | 214,991 | 8.1 |
| | Independent | Susumu Honma | 130,364 | 4.9 |
| | Social Democratic | Kazumi Aoki | 124,113 | 4.7 |
| | People's New | Michiko Iwabuchi | 99,316 | 3.8 |
| Turnout | Turnout | Turnout | | |
2004 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wakako Hironaka | 1,187,663 | 49.1 |
| | LDP | Kazuyasu Shiina (endorsed by Komeito) | 944,231 | 39.0 |
| | JCP | Fumiko Asano | 288,072 | 11.9 |
| Turnout | Turnout | Turnout | | |
2002 By-Election :
| Party | Party | Candidate | Votes | % |
| | LDP | Kazuyasu Shiina | 509,688 | 45.1 |
| | Clean Chiba Political Roundtable | Yasuhito Wakai | 422,185 | 37.4 |
| | JCP | Fumiko Asano | 197,699 | 17.5 |
| Turnout | Turnout | Turnout | | 39.61 |