# Tokyo 4th district

Tokyo 4th district (東京都第4区 Tōkyō-to dai 4-ku) is a single-member constituency of the House of Representatives, the lower house of the national Diet of Japan. It is located in southern Tokyo city and consists of much of Ōta Ward (Kamata, Ōmori, Haneda.) The seat is held by Masaaki Taira, a member of the Liberal Democratic Party since 2012.
As of September 2022, 425,428 voters were registered in the district.

## List of Representatives

| Representatives | Party | Dates | Notes |
| Shoukei Arai | Independent | 1996–1998 | Redistricted from the former 2nd district. Died in office. |
| Kensaku Morita | LDP | 1998–2000 | |
| Kensaku Morita | Independent | 2000 | Re-elected in 2000. |
| Kensaku Morita | LDP | 2000–2003 | Did not run for re-election. |
| Kazuyoshi Nakanishi | LDP | 2003–2005 | Resigned mid-term. |
| Masaaki Taira | LDP | 2005–2009 | Re-elected in the Tokyo PR block. |
| Fujita Norihiko | DPJ | 2009–2012 | Lost re-election. |
| Masaaki Taira | LDP | 2012– present | Re-elected in 2014, 2017, 2021. |

## Election Results

2024 :
| Party | Party | Candidate |
| | Liberal Democratic | Masaaki Taira |
| | Democratic For the People | Masae Ido |
| | Ishin | Masatoshi Ishikawa |
| | Communist | Tomoyuki Tanigawa |
| | Sanseitō | Yūta Shiodera |
| Turnout | Turnout | Turnout |
2021 Japanese general election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Masaaki Taira (Incumbent) (Endorsed by Komeito) | 128,708 | 51.5 | 0.7 |
| | Communist | Tomoyuki Tanigawa | 62,286 | 24.9 | 13.6 |
| | Ishin | Hayashi Tomoko | 58,891 | 23.6 | New |
| Turnout | Turnout | Turnout | 474,029 | 54.4 | 3.7 |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
2017 Japanese general election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Masaaki Taira (Incumbent) (Endorsed by Komeito) | 115,239 | 50.8 | 0.5 |
| | Constitutional Democratic | Masae Ido | 53,480 | 23.3 | New |
| | Kibō no Tō | Michiyo Namba | 35,352 | 15.4 | New |
| | Communist | Kohei Aoyama | 26,037 | 11.3 | 6.6 |
| Turnout | Turnout | Turnout | 466,486 | 50.7 | 1.5 |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
2014 Japanese general election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Masaaki Taira (Incumbent) (Endorsed by Komeito) | 109,377 | 50.3 | 10.9 |
| | Democratic | Fujita Norihiko (Endorsed by Japan Innovation Party) | 48,861 | 22.5 | 5.2 |
| | Communist | Junpei Yamamoto | 38,925 | 17.9 | 8.1 |
| | Japanese Kokoro | Hirekazu Inubushi | 20,108 | 18.4 | New |
| Turnout | Turnout | Turnout | 432,784 | 52.3 | 7.7 |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
2012 Japanese general election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Masaaki Taira (Endorsed by Komeito) | 96,810 | 39.4 | 1.9 |
| | Restoration | Hirekazu Inubushi | 44,999 | 18.3 | New |
| | Democratic | Fujita Norihiko (Incumbent) (Endorsed by People's New Party) | 42,424 | 17.3 | 20.3 |
| | Your | Masashi Hirose | 34,902 | 14.2 | New |
| | Communist | Junpei Yamamoto | 24,167 | 9.8 | 0.9 |
| | Euthanasia party | Hidemitsu Sano | 2,603 | 1.1 | New |
| Turnout | Turnout | Turnout | 427,018 | 60.0 | 4.2 |
| | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic |
2009 Japanese general election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Fujita Norihiko | 100,067 | 37.5 | 3.8 |
| | Liberal Democratic | Masaaki Taira (Incumbent) (Endorsed by Komeito) | 93,583 | 35.1 | 11.6 |
| | Independent | Noboru Usami | 46,107 | 17.3 | New |
| | Communist | Kaname Shibuya | 23,622 | 8.9 | 0.9 |
| | Happiness Realization | Kikue Shimokawa | 3,323 | 1.3 | New |
| Turnout | Turnout | Turnout | 426,496 | 64.2 | 0.3 |
| | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic |
2005 Japanese general election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Masaaki Taira (Incumbent) | 119,812 | 46.7 | 5.3 |
| | Democratic | Usami Noboru | 86,354 | 33.7 | 1.9 |
| | Communist | Fuminori Sato | 25,077 | 9.8 | 1.1 |
| | Independent | Kazuyoshi Nakanishi | 19,955 | 7.8 | New |
| | Independent | Sato Hiromi | 5,313 | 2.1 | New |
| Turnout | Turnout | Turnout | N/A | 63.9 | 4.0 |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
2003 Japanese general election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Kazuyoshi Nakanishi | 90,693 | 41.4 | 3.0 |
| | Democratic | Usami Noboru | 77,953 | 35.6 | 15.0 |
| | New Conservative | Eriko Yamatani | 26,707 | 12.2 | New |
| | Communist | Tomio Yamaguchi | 23,942 | 10.9 | 4.2 |
| Turnout | Turnout | Turnout | N/A | 59.9 | 2.6 |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
2000 Japanese general election :
| Party | Party | Candidate | Votes | % | ±% |
| | Independent | Kensaku Morita (Incumbent) | 92,711 | 38.4 | 4.0 |
| | Komeito | Otohiko Endo | 59,487 | 24.7 | New |
| | Democratic | Usami Noboru | 49,662 | 20.6 | New |
| | Communist | Michinobu Tokutome | 36,498 | 15.1 | 9.0 |
| | Liberal League | Miyuki Mitsuda | 2,925 | 3.2 | New |
| Turnout | Turnout | Turnout | N/A | 62.5 | 2.8 |
| | Independent hold | Independent hold | Independent hold | Independent hold | Independent hold |
1998 House of Representatives By-Election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Kensaku Morita | 50,242 | 34.4 | 11.7 |
| | Independent | Jin Matsubara | 35,521 | 24.3 | New |
| | Communist | Michinobu Tokutome | 35,150 | 24.1 | 9.3 |
| | Independent | Tetsu Ueda | 18,305 | 12.5 | New |
| | Liberal | Hiroyasu Satake | 6,254 | 4.3 | New |
| | Independent | Setsuo Yamaguchi | 662 | 0.6 | New |
| Turnout | Turnout | Turnout | N/A | N/A | N/A |
| | Liberal Democratic gain from Independent | Liberal Democratic gain from Independent | Liberal Democratic gain from Independent | Liberal Democratic gain from Independent | Liberal Democratic gain from Independent |
1996 Japanese general election :
| Party | Party | Candidate | Votes | % | ±% |
| | Independent | Shoukei Arai | 78,805 | 38.2 | New |
| | Liberal Democratic | Keigo Ouchi | 46,840 | 22.7 | New |
| | Communist | Mitsuo Kobana | 30,522 | 14.8 | New |
| | Democratic | Akiko Nakata | 23,260 | 11.3 | New |
| | Independent | Tetsu Ueda | 21,319 | 10.3 | New |
| | Independent | Osamu Kono | 3,367 | 1.6 | New |
| | New Socialist | Naemi Kurosawa | 2,418 | 1.2 | New |
| Turnout | Turnout | Turnout | N/A | 59.7 | New |
| | Independent win (new seat) | Independent win (new seat) | Independent win (new seat) | Independent win (new seat) | Independent win (new seat) |