# Tokyo 20th district

Tokyo 20th District (東京都第20区, Tokyo-to dai-niju-ku) is an electoral district of the Japanese House of Representatives. The district was created in 1994 as part of the move to single-member districts that same year, and the district is currently represented by the Liberal Democratic Party's Seiji Kihara.

## Areas covered

As of 13 January 2023, the areas covered by this district area as follows:
* Higashimurayama
* Higashiyamato
* Kiyose
* Higashikurume
* Musashimurayama
Since its creation in 1994, the borders of this district have so far not been changed.

## Elected representatives

| Representative | Party | Years served | Notes |
| Yuriko Ono | NFP | 1996-2000 | |
| Koichi Kato | DPJ | 2000-2005 | |
| Seiji Kihara | LDP | 2005-2009 | |
| Koichi Kato | DPJ | 2009-2012 | |
| Seiji Kihara | LDP | 2012- | Incumbent |

## Election results

‡ - Also ran in the Tokyo PR district
‡‡ - Also ran and won in the Tokyo PR district
2024 :
| Party | Party | Candidate |
| | Liberal Democratic | Seiji Kihara |
| | Communist | Toru Miyamoto |
| | Democratic For the People | Kentarō Oonishi |
| Registered electors | Registered electors | Registered electors |
| Turnout | Turnout | Turnout |
2021 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Seiji Kihara$^‡$ (incumbent) (endorsed by Komeito) | 121,621 | 52.6 | 2.7 |
| | Communist | Toru Miyamoto$^‡$ (incumbent - Tokyo PR) (endorsed by the SDP) | 66,516 | 28.8 | 2.0 |
| | Ishin | Junichiro Maeda$^‡$ | 43,089 | 18.6 | New |
| Registered electors | Registered electors | Registered electors | 418,245 | | |
| Turnout | Turnout | Turnout | 237,438 | 56.8 | 3.2 |
| | Liberal Democratic hold | Liberal Democratic hold | Swing | 2.5 | |
2017 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Seiji Kihara$^‡$ (incumbent) (endorsed by Komeito) | 107,686 | 49.9 | 2.2 |
| | Communist | Toru Miyamoto$^‡$ (incumbent - Tokyo PR) (endorsed by the SDP) | 57,741 | 26.8 | 2.5 |
| | Kibō no Tō | Akira Shikano$^‡$ | 50,439 | 23.4 | New |
| Registered electors | Registered electors | Registered electors | 415,565 | | |
| Turnout | Turnout | Turnout | 222,909 | 53.6 | 0.9 |
| | Liberal Democratic hold | Liberal Democratic hold | Swing | 7.0 | |
2014 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Seiji Kihara$^‡$ (incumbent) (endorsed by Komeito) | 110,273 | 52.1 | 11.7 |
| | Democratic | Mitsuaki Takeda$^‡$ (endorsed by the JIP) | 51,362 | 24.3 | 1.1 |
| | Communist | Mariko Ikeda | 49,902 | 23.6 | 10.0 |
| Registered electors | Registered electors | Registered electors | 404,949 | | |
| Turnout | Turnout | Turnout | 220,576 | 54.5 | 3.2 |
| | Liberal Democratic hold | Liberal Democratic hold | Swing | 8.1 | |
2012 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Seiji Kihara$^‡$ (endorsed by Komeito) | 98,070 | 40.4 | 4.4 |
| | Democratic | Koichi Kato$^‡$ (incumbent) (endorsed by the PNP) | 61,519 | 25.4 | 25.8 |
| | Restoration | Kazusa Noda$^‡$ | 50,031 | 20.6 | New |
| | Communist | Mariko Ikeda | 33,092 | 13.6 | 1.8 |
| Registered electors | Registered electors | Registered electors | 402,763 | | |
| Turnout | Turnout | Turnout | 254,264 | 63.1 | 5.0 |
| | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Swing | 5.5 | |
2009 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Koichi Kato$^‡$ (incumbent - Tokyo PR) (endorsed by the SDP) | 136,294 | 51.2 | 2.7 |
| | Liberal Democratic | Seiji Kihara$^‡$ (incumbent) | 95,718 | 36.0 | 6.6 |
| | Communist | Mariko Ikeda$^‡$ | 31,475 | 11.8 | 1.0 |
| | Happiness Realization | Kazuyuki Abe | 2,560 | 1.0 | New |
| Registered electors | Registered electors | Registered electors | 398,174 | | |
| Turnout | Turnout | Turnout | 271,157 | 68.1 | 1.1 |
| | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic | Swing | 5.1 | |
2005 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Seiji Kihara$^‡$ | 112,634 | 44.6 | 7.4 |
| | Democratic | Toru Miyamoto$^{‡‡}$ (incumbent) | 107,916 | 42.7 | 8.0 |
| | Communist | Mariko Ikeda$^‡$ | 32,299 | 12.8 | 0.7 |
| Registered electors | Registered electors | Registered electors | 388,041 | | |
| Turnout | Turnout | Turnout | 259,794 | 67.0 | 6.9 |
| | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Swing | 3.7 | |
2003 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Koichi Kato$^‡$ (incumbent) | 111,041 | 50.7 | 11.2 |
| | Liberal Democratic | Seiichiro Shimizu$^‡$ | 81,588 | 37.2 | New |
| | Communist | Mariko Ikeda | 26,434 | 12.1 | 3.1 |
| Registered electors | Registered electors | Registered electors | 380,991 | | |
| Turnout | Turnout | Turnout | 237,438 | 60.1 | 4.8 |
| | Democratic hold | Democratic hold | Swing | 15.2 | |
2000 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Koichi Kato$^‡$ | 93,236 | 39.5 | 19.2 |
| | Komeito | Yuriko Ono$^‡$ | 58,613 | 24.8 | 2.0 |
| | Independent | Seiichiro Shimizu | 48,613 | 20.6 | New |
| | Communist | Ikuo Suzuki | 35,826 | 15.2 | 1.9 |
| Registered electors | Registered electors | Registered electors | 371,592 | | |
| Turnout | Turnout | Turnout | 241,052 | 64.9 | |
| | Democratic gain from New Frontier | Democratic gain from New Frontier | Swing | 9.6 | |
1996 :
| Party | Party | Candidate | Votes | % | ±% |
| | New Frontier | Yuriko Ono | 55,559 | 27.0 | New |
| | Liberal Democratic | Seiichiro Shimizu$^‡$ | 54,582 | 26.5 | New |
| | Democratic | Shino Nakano$^‡$ | 41,705 | 20.3 | New |
| | Communist | Nobuhiro Maesawa | 35,150 | 17.1 | New |
| | Independent | Naoko Asaki | 13,957 | 6.8 | New |
| | New Socialist | Etsuko Nagata | 4,878 | 2.4 | New |
| Registered electors | Registered electors | Registered electors | 360,803 | | |
| Turnout | Turnout | Turnout | 210,925 | 58.5 | N/A |
| | New Frontier win (new seat) | New Frontier win (new seat) | New Frontier win (new seat) | New Frontier win (new seat) | New Frontier win (new seat) |