# Tokyo 12th district

Tokyo's 12th district is a single-member constituency of the House of Representatives, the lower house of the national Diet of Japan.

## List of Representatives

| Election | Representative | Party | Notes |
| 1996 | Eita Yashiro [ja] | Liberal Democratic | |
| 2000 | Eita Yashiro [ja] | Liberal Democratic | |
| 2003 | Akihiro Ota | Komeito | |
| 2005 | Akihiro Ota | Komeito | |
| 2009 | Ai Aoki | Democratic | |
| 2009 | Ai Aoki | People's Life First | |
| 2009 | Ai Aoki | Tomorrow | |
| 2012 | Akihiro Ota | Komeito | |
| 2014 | Akihiro Ota | Komeito | |
| 2017 | Akihiro Ota | Komeito | |
| 2021 | Mitsunari Okamoto | Komeito | Moved to the Tokyo 29th district |
| 2024 | Kei Takagi | Liberal Democratic | |

## Election results

2024 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Kei Takagi | 68,878 | 33.3 | |
| | Ishin | Tsukasa Abe [ja] (elected in Tokyo PR block) | 52,233 | 25.2 | 6.5 |
| | DPP | Toshiaki Ookuma | 44,524 | 21.5 | |
| | JCP | Seiko Tahara | 41,504 | 20.0 | 8.4 |
| Registered electors | Registered electors | Registered electors | 378,204 | | |
| Turnout | Turnout | Turnout | | 57.09 | 0.36 |
2021 :
| Party | Party | Candidate | Votes | % | ±% |
| | Komeito (endorsed by LDP) | Mitsunari Okamoto (PR seat incumbent) | 101,020 | 39.88 | |
| | Innovation | Tsukasa Abe (elected in Tokyo PR block) | 80,323 | 31.71 | New |
| | Communist | Saori Ikeuchi | 71,948 | 28.41 | |
| Majority | Majority | Majority | 20,697 | 8.17 | |
| Registered electors | Registered electors | Registered electors | 462,732 | | |
| Turnout | Turnout | Turnout | | 57.45 | 4.98 |
| | Komeito hold | Komeito hold | Komeito hold | Komeito hold |
2017 :
| Party | Party | Candidate | Votes | % | ±% |
| | Komeito (endorsed by LDP) | Akihiro Ota (incumbent) | 112,597 | 51.64 | |
| | Communist | Saori Ikeuchi (PR seat incumbent) | 83,544 | 38.32 | |
| | Assembly for Zero Parliamentary Compensation | Masaru Nakamura | 21,892 | 10.04 | New |
| Majority | Majority | Majority | 29,053 | 13.32 | |
| Registered electors | Registered electors | Registered electors | 460,263 | | |
| Turnout | Turnout | Turnout | | 52.47 | 3.35 |
| | Komeito hold | Komeito hold | Komeito hold | Komeito hold |
2014 :
| Party | Party | Candidate | Votes | % | ±% |
| | Komeito (endorsed by LDP) | Akihiro Ota (incumbent) | 88,499 | 41.64 | |
| | Communist | Saori Ikeuchi (won PR seat) | 44,721 | 21.04 | |
| | People's Life | Ai Aoki (PR seat incumbent) | 40,067 | 18.85 | New |
| | Future Generations | Toshio Tamogami | 39,233 | 18.46 | New |
| Majority | Majority | Majority | 43,778 | 20.60 | |
| Registered electors | Registered electors | Registered electors | 398,205 | | |
| Turnout | Turnout | Turnout | | 56.04 | 6.94 |
| | Komeito hold | Komeito hold | Komeito hold | Komeito hold |
2012 :
| Party | Party | Candidate | Votes | % | ±% |
| | Komeito (endorsed by LDP) | Akihiro Ota | 114,052 | 51.43 | |
| | Tomorrow (endorsed by Daichi) | Ai Aoki (incumbent) (won PR seat) | 56,432 | 25.45 | New |
| | Communist | Saori Ikeuchi | 41,934 | 18.91 | |
| | Happiness Realization | Masami Hattori | 9,359 | 4.22 | |
| Majority | Majority | Majority | 57,620 | 25.98 | |
| Registered electors | Registered electors | Registered electors | 394,907 | | |
| Turnout | Turnout | Turnout | | 62.98 | 6.08 |
| | Komeito gain from Tomorrow | Komeito gain from Tomorrow | Komeito gain from Tomorrow | Komeito gain from Tomorrow | Komeito gain from Tomorrow |
2009 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic (endorsed by PNP) | Ai Aoki | 118,753 | 45.20 | |
| | Komeito (endorsed by LDP) | Akihiro Ota (incumbent) | 108,679 | 41.37 | |
| | Communist | Saori Ikeuchi | 31,475 | 11.98 | |
| | Happiness Realization | Hideyuki Yokuni [ja] | 3,813 | 1.45 | New |
| Majority | Majority | Majority | 10,074 | 3.83 | |
| Registered electors | Registered electors | Registered electors | 393,158 | | |
| Turnout | Turnout | Turnout | | 69.06 | 1.26 |
| | Democratic gain from Komeito | Democratic gain from Komeito | Democratic gain from Komeito | Democratic gain from Komeito | Democratic gain from Komeito |
2005 :
| Party | Party | Candidate | Votes | % | ±% |
| | Komeito | Akihiro Ota (incumbent) | 109,636 | 43.18 | |
| | Democratic | Yukihisa Fujita (PR seat incumbent) | 73,943 | 29.12 | |
| | Independent | Eita Yashiro [ja] (PR seat incumbent) | 44,279 | 17.44 | New |
| | Communist | Ken Nonoyama | 26,068 | 10.27 | |
| Majority | Majority | Majority | 35,693 | 14.06 | |
| Turnout | Turnout | Turnout | | 67.80 | |
| | Komeito hold | Komeito hold | Komeito hold | Komeito hold |
2003 :
| Party | Party | Candidate | Votes | % | ±% |
| | Komeito | Akihiro Ota (PR seat incumbent) | 98,700 | 44.05 | New |
| | Democratic | Yukihisa Fujita (won PR seat) | 95,110 | 42.45 | |
| | Communist | Mitsuo Yamagishi | 30,251 | 13.50 | |
| Majority | Majority | Majority | 3,590 | 1.60 | |
| Turnout | Turnout | Turnout | | | |
| | Komeito gain from LDP | Komeito gain from LDP | Komeito gain from LDP | Komeito gain from LDP | Komeito gain from LDP |
2000 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Eita Yashiro [ja] (incumbent) | 90,208 | 40.73 | |
| | Democratic | Yukihisa Fujita (PR seat incumbent) | 64,913 | 29.31 | New |
| | Communist | Mitsuo Yamagishi | 45,482 | 20.53 | |
| | Liberal League | Shinichiro Kurimoto (Tokyo 3rd incumbent) | 20,902 | 9.44 | New |
| Majority | Majority | Majority | 25,295 | 11.42 | |
| Turnout | Turnout | Turnout | | | |
| | LDP hold | LDP hold | LDP hold | LDP hold |
1996 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Eita Yashiro [ja] | 61,461 | 28.41 | New |
| | New Frontier | Tamaki Sawa [ja] | 60,289 | 27.87 | New |
| | Communist | Kohei Īda | 45,858 | 21.20 | New |
| | Democratic | Muneharu Wada [ja] | 38,785 | 17.93 | New |
| | Independent | Kennei Yasuda | 5,501 | 2.54 | New |
| | New Socialist | Eiko Tomiyama | 4,456 | 2.06 | New |
| Majority | Majority | Majority | 1,172 | 0.54 | |
| Turnout | Turnout | Turnout | | | |
| | LDP win (new seat) | LDP win (new seat) | LDP win (new seat) | LDP win (new seat) |