# Chiba 9th district

Chiba 9th district (千葉県第9区, Chiba-ken dai-kyuku or simply 千葉9区, Chiba-kyuku) is a single-member constituency of the House of Representatives in the national Diet of Japan located in Chiba Prefecture.

## Areas covered
### Since 2002

* Part of Chiba city
** Wakaba-ku
* Sakura
* Yachimata
* Yotsukaidō

### 1994 - 2002

* Sakura
* Yachimata
* Yotsukaidō
* Inba District

## List of representatives

| Election | Representative | Party |
| 1996 | Yukio Jitsukawa | New Frontier |
| 1996 | Yukio Jitsukawa | LDP |
| 2000 | Kenichi Mizuno | LDP |
| 2003 | Kenichi Mizuno | LDP |
| 2005 | Kenichi Mizuno | LDP |
| 2009 | Soichiro Okuno [ja] | Democratic |
| 2012 | Masatoshi Akimoto | LDP |
| 2014 | Masatoshi Akimoto | LDP |
| 2017 | Masatoshi Akimoto | LDP |
| 2021 | Soichiro Okuno [ja] | CDP |
| 2024 | Soichiro Okuno [ja] | CDP |

## Election Results
### 2024

2024 :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Soichiro Okuno [ja] (Incumbent) | 86,335 | 43.89 | 7.20 |
| | LDP | Hisato Tamiya | 65,963 | 33.53 | 15.38 |
| | Ishin | Takashi Tanuma [ja] | 33,034 | 16.79 | New |
| | JCP | Haruyuki Yamazaki | 11,385 | 5.79 | N/A |
| Majority | Majority | Majority | 20,372 | 10.36 | |
| Registered electors | Registered electors | Registered electors | 401,047 | | |
| Turnout | Turnout | Turnout | | 50.64 | 2.37 |
| | CDP hold | CDP hold | CDP hold | CDP hold |

### 2021

2021 :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Soichiro Okuno [ja] | 107,322 | 51.09 | New |
| | LDP | Masatoshi Akimoto (Incumbent) (Won PR seat) | 102,741 | 48.91 | 2.12 |
| Majority | Majority | Majority | 4,581 | 2.18 | |
| Registered electors | Registered electors | Registered electors | 407,331 | | |
| Turnout | Turnout | Turnout | | 53.01 | 3.53 |
| | CDP gain from LDP | CDP gain from LDP | CDP gain from LDP | CDP gain from LDP | CDP gain from LDP |

### 2017

2017 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Masatoshi Akimoto (Incumbent) | 92,180 | 46.79 | 3.85 |
| | Kibō no Tō | Soichiro Okuno [ja] (Won PR seat) | 76,332 | 38.75 | New |
| | JCP | Yasushiro Kamoshida | 28,488 | 14.46 | 4.13 |
| Majority | Majority | Majority | 15,848 | 8.04 | |
| Registered electors | Registered electors | Registered electors | 410,963 | | |
| Turnout | Turnout | Turnout | | 49.48 | 1.49 |
| | LDP hold | LDP hold | LDP hold | LDP hold |

### 2014

2014 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Masatoshi Akimoto (Incumbent) | 85,092 | 42.94 | 7.44 |
| | Democratic | Soichiro Okuno [ja] (Won PR seat) | 68,564 | 34.60 | 6.46 |
| | Future Generations | Yuzuru Nishida [ja] | 24,039 | 12.13 | New |
| | JCP | Yasushiro Kamoshida | 20,475 | 10.33 | 4.74 |
| Majority | Majority | Majority | 16,528 | 8.34 | |
| Registered electors | Registered electors | Registered electors | 402,951 | | |
| Turnout | Turnout | Turnout | | 50.97 | 6.90 |
| | LDP hold | LDP hold | LDP hold | LDP hold |

### 2012

2012 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Masatoshi Akimoto | 80,024 | 35.50 | 5.03 |
| | Democratic | Soichiro Okuno [ja] (Incumbent) (Won PR seat) | 63,422 | 28.14 | 26.41 |
| | Restoration | Yuzuru Nishida [ja] (Won PR seat) | 45,781 | 20.31 | New |
| | Tomorrow | Mitsue Kawakami [ja] | 16,616 | 7.37 | New |
| | JCP | Toshiyuki Kizaki | 12,601 | 5.59 | N/A |
| | Independent | Hiroshi Sudo [ja] | 6,955 | 3.09 | New |
| Majority | Majority | Majority | 16,602 | 7.36 | |
| Registered electors | Registered electors | Registered electors | 402,578 | | |
| Turnout | Turnout | Turnout | | 57.87 | 6.46 |
| | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic |

### 2009

2009 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Soichiro Okuno [ja] | 136,932 | 54.55 | 22.41 |
| | LDP | Kenichi Mizuno (Incumbent) | 101,734 | 40.53 | 16.40 |
| | Independent | Tatsuo Hatano | 7,651 | 3.05 | New |
| | Happiness Realization | Junko Ito | 4,707 | 1.87 | New |
| Majority | Majority | Majority | 35,198 | 14.02 | |
| Registered electors | Registered electors | Registered electors | 399,436 | | |
| Turnout | Turnout | Turnout | | 64.33 | 0.11 |
| | Democratic gain from LDP | Democratic gain from LDP | Democratic gain from LDP | Democratic gain from LDP | Democratic gain from LDP |

### 2005

2005 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Kenichi Mizuno (Incumbent) | 140,838 | 56.93 | 7.59 |
| | Democratic | Hiroshi Sudo [ja] | 79,514 | 32.14 | 10.44 |
| | JCP | Tadahira Ogura | 16,307 | 6.59 | 1.49 |
| | People's New | Hideo Nakahara | 10,746 | 4.34 | New |
| Majority | Majority | Majority | 61,324 | 24.79 | |
| Registered electors | Registered electors | Registered electors | 392,712 | | |
| Turnout | Turnout | Turnout | | 64.22 | 8.84 |
| | LDP hold | LDP hold | LDP hold | LDP hold |

### 2003

2003 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Kenichi Mizuno (Incumbent) | 103,199 | 49.34 | 6.40 |
| | Democratic | Hiroshi Sudo [ja] (Won PR seat) | 89,057 | 42.58 | 0.64 |
| | JCP | Yoshikatsu Ueda | 16,892 | 8.08 | 5.08 |
| Majority | Majority | Majority | 14,142 | 6.76 | |
| Registered electors | Registered electors | Registered electors | 390,110 | | |
| Turnout | Turnout | Turnout | | 55.38 | 3.61 |
| | LDP hold | LDP hold | LDP hold | LDP hold |

### 2000

2000 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Kenichi Mizuno | 103,381 | 42.94 | 8.44 |
| | Democratic | Hiroshi Sudo [ja] | 71,184 | 29.57 | New |
| | JCP | Kazuo Seki | 31,671 | 13.16 | 0.03 |
| | Liberal | Shin Ubukata | 29,777 | 12.37 | New |
| | Liberal League | Kiyoshi Furuhashi | 4,733 | 1.96 | New |
| Majority | Majority | Majority | 32,197 | 13.37 | |
| Registered electors | Registered electors | Registered electors | 428,734 | | |
| Turnout | Turnout | Turnout | | 58.99 | |
| | LDP hold | LDP hold | LDP hold | LDP hold |

### 1996

1996 :
| Party | Party | Candidate | Votes | % | ±% |
| | New Frontier | Yukio Jitsukawa | 79,539 | 36.26 | New |
| | LDP | Kenichi Mizuno | 75,667 | 34.50 | New |
| | Democratic | Yasutami Ota | 35,211 | 16.05 | New |
| | JCP | Kazuo Seki | 28,937 | 13.19 | New |
| Majority | Majority | Majority | 3,872 | 1.76 | |
| Registered electors | Registered electors | Registered electors | | | |
| Turnout | Turnout | Turnout | | | |
| | New Frontier win (new seat) | New Frontier win (new seat) | New Frontier win (new seat) | New Frontier win (new seat) |