# Aichi 12th district

Aichi 12th district (愛知県第12区, Aichi-ken dai-ju-niku or simply 愛知12区, Aichi ju-niku) is a single-member constituency of the House of Representatives in the national Diet of Japan located in Aichi Prefecture.

## Areas covered
### since 2017

* Okazaki
* Nishio

### 2013 - 2017

* Okazaki
* Nishio
* Nukata District

### 1994 - 2013

* Okazaki
* Nishio
* Nukata District
* Hazu District

## List of representatives

| Election | Representative | Party |
| 1996 | Seiken Sugiura | Liberal Democratic |
| 2000 | Seiken Sugiura | Liberal Democratic |
| 2003 | Seiken Sugiura | Liberal Democratic |
| 2005 | Seiken Sugiura | Liberal Democratic |
| 2009 | Yasuhiro Nakane [ja] | Democratic |
| 2012 | Shuhei Aoyama | Liberal Democratic |
| 2014 | Kazuhiko Shigetoku | Innovation |
| 2014 | Kazuhiko Shigetoku | Independent |
| 2014 | Kazuhiko Shigetoku | Vision of Reform |
| 2014 | Kazuhiko Shigetoku | Democratic |
| 2017 | Kazuhiko Shigetoku | Independent |
| 2021 | Kazuhiko Shigetoku | CDP |

## Election results
### 2021

2021 :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Kazuhiko Shigetoku (incumbent) | 142,536 | 52.67 | New |
| | Liberal Democratic (endorsed by Komeito) | Shuhei Aoyama (PR seat incumbent) (won PR seat) | 128,083 | 47.33 | |
| Majority | Majority | Majority | 14,453 | 5.34 | |
| Registered electors | Registered electors | Registered electors | 444,780 | | |
| Turnout | Turnout | Turnout | | 61.97 | 0.25 |
| | CDP hold | CDP hold | CDP hold | CDP hold |

### 2017

2017 :
| Party | Party | Candidate | Votes | % | ±% |
| | Independent | Kazuhiko Shigetoku (incumbent) | 149,587 | 55.65 | New |
| | Liberal Democratic (endorsed by Komeito) | Shuhei Aoyama (PR seat incumbent) | 104,811 | 39.00 | |
| | Communist | Isao Miyaji | 14,378 | 5.35 | |
| Majority | Majority | Majority | 44,776 | 16.65 | |
| Registered electors | Registered electors | Registered electors | 444,298 | | |
| Turnout | Turnout | Turnout | | 61.72 | 0.82 |
| | Independent hold | Independent hold | Independent hold | Independent hold |
* Aoyama was additionally elected by Tokai proportional representation block following Sei Ōmi [ja]'s resignation(running in a Anjō mayoral election).

### 2014

2014 :
| Party | Party | Candidate | Votes | % | ±% |
| | Innovation | Kazuhiko Shigetoku (PR seat incumbent) | 131,618 | 48.49 | New |
| | Liberal Democratic (endorsed by Komeito) | Shuhei Aoyama (incumbent) (won PR seat) | 118,165 | 43.54 | |
| | Communist | Jiro Makino | 21,637 | 7.97 | |
| Majority | Majority | Majority | 13,453 | 4.95 | |
| Registered electors | Registered electors | Registered electors | 458,221 | | |
| Turnout | Turnout | Turnout | | 60.90 | 2.95 |
| | Ishin gain from LDP | Ishin gain from LDP | Ishin gain from LDP | Ishin gain from LDP | Ishin gain from LDP |

### 2012

2012 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic (endorsed by Komeito) | Shuhei Aoyama | 91,816 | 32.34 | |
| | Democratic (endorsed by PNP) | Yasuhiro Nakane [ja] (incumbent) (won PR seat) | 82,363 | 29.01 | |
| | Restoration (endorsed by Your) | Kazuhiko Shigetoku (won PR seat) | 69,198 | 24.37 | New |
| | Tomorrow (endorsed by Daichi) | Yuzuru Tsuzuki [ja] (PR seat incumbent) | 30,850 | 10.87 | New |
| | Communist | Haruji Wakayama | 9,687 | 3.41 | |
| Majority | Majority | Majority | 9,453 | 3.33 | |
| Registered electors | Registered electors | Registered electors | 454,656 | | |
| Turnout | Turnout | Turnout | | 63.85 | 10.22 |
| | 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 | Yasuhiro Nakane [ja] | 180,972 | 55.36 | |
| | Liberal Democratic | Seiken Sugiura (incumbent) | 122,198 | 37.38 | |
| | Communist | Hiroko Hatta | 20,551 | 6.29 | |
| | Happiness Realization | Yoshiki Gokan | 3,171 | 0.97 | New |
| Majority | Majority | Majority | 58,774 | 17.98 | |
| Registered electors | Registered electors | Registered electors | 448,205 | | |
| Turnout | Turnout | Turnout | | 74.07 | 2.99 |
| | 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 | % | ±% |
| | Liberal Democratic | Seiken Sugiura (incumbent) | 159,256 | 52.62 | |
| | Democratic | Yasuhiro Nakane [ja] (PR seat incumbent) | 128,681 | 42.52 | |
| | Communist | Noboru Hagiwara | 14,708 | 4.86 | |
| Majority | Majority | Majority | 30,575 | 10.10 | |
| Registered electors | Registered electors | Registered electors | 432,843 | | |
| Turnout | Turnout | Turnout | | 71.08 | 6.44 |
| | LDP hold | LDP hold | LDP hold | LDP hold |

### 2003

2003 :
| Party | Party | Candidate | Votes | % |
| | Liberal Democratic | Seiken Sugiura (incumbent) | 135,622 | 50.38 |
| | Democratic | Yasuhiro Nakane [ja] (won PR seat) | 117,411 | 43.61 |
| | Communist | Noriko Nomura | 16,191 | 6.01 |
| Majority | Majority | Majority | 18,211 | 6.77 |
| Registered electors | Registered electors | Registered electors | 424,973 | |
| Turnout | Turnout | Turnout | | 64.64 |
| | LDP hold | LDP hold | LDP hold | LDP hold |

### 2000

2000 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Seiken Sugiura (incumbent) | 117,475 | 45.56 | |
| | Democratic | Yasuhiro Nakane [ja] | 81,826 | 31.73 | New |
| | Liberal | Yuzuru Tsuzuki [ja] (won PR seat) | 33,052 | 12.82 | New |
| | Communist | Noriko Nomura | 21,581 | 8.37 | |
| | Liberal League | Takashi Kawashima | 2,517 | 0.98 | New |
| | Independent | Akira Fukuda | 1,422 | 0.55 | New |
| Majority | Majority | Majority | 35,649 | 13.83 | |
| Turnout | Turnout | Turnout | | | |
| | LDP hold | LDP hold | LDP hold | LDP hold |

### 1996

1996 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Seiken Sugiura | 133,257 | 55.16 | New |
| | New Frontier | Minoru Kawashima [ja] | 79,950 | 33.10 | New |
| | Communist | Masumi Yamada | 28,358 | 11.74 | New |
| Majority | Majority | Majority | 53,307 | 22.06 | |
| Turnout | Turnout | Turnout | | | |
| | LDP win (new seat) | LDP win (new seat) | LDP win (new seat) | LDP win (new seat) |