# Tokyo 15th district

Tokyo 15th District (東京都第15区, Tokyo-to jugo-ku) is an electoral district of the Japanese House of Representatives. The district was established in 1994 as part of the change to single-member districts, and it is currently represented by Natsumi Sakai, member of the CDP.

## Areas covered
### Current district

As of 13 January 2023, the areas covered by this district are as follows:
* Kōtō, since the creation of the district

## Elected representatives

| Representative | Party | Years served | Notes |
| Koji Kakizawa | LDP | 1996–1999 | Redistricted from the former 15th district. Resigned his seat to run in the 1999 Tokyo gubernatorial election. |
| Ben Kimura | LDP | 1999–2000 | Lost re-election. |
| Koji Kakizawa | Ind. | 2000–2003 | Retired from politics. |
| Ben Kimura | LDP | 2003–2009 | Lost re-election. |
| Shozo Azuma | DPJ | 2009–2012 | |
| Shozo Azuma | PLF | 2012 | |
| Shozo Azuma | TPJ | 2012 | Lost re-election. |
| Mito Kakizawa | Your | 2012–2013 | |
| Mito Kakizawa | Ind. | 2013 | |
| Mito Kakizawa | Unity | 2013–2014 | |
| Mito Kakizawa | JIP | 2014–2016 | Re-elected in 2014. |
| Mito Kakizawa | DP | 2016–2017 | |
| Mito Kakizawa | Kibō | 2017 | Re-elected in the Tokyo PR block. |
| Tsukasa Akimoto | LDP | 2017–2021 | Resigned mid-term. |
| Mito Kakizawa | Ind. | 2021–2024 | Resigned mid-term. |
| Natsumi Sakai | CDP | 2024– | |

## Election results

‡ - Also ran in the Tokyo PR district election
‡‡ - Also ran and won in the Tokyo PR district election
2024 :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Natsumi Sakai | 66,791 | 27.5 | 1.5 |
| | Independent | Genki Sudo | 65,666 | 27.1 | 9.7 |
| | LDP | Kōki Oozora$^{‡‡}$ | 62,771 | 25.9 | |
| | Independent | Yui Kanazawa | 32,442 | 13.4 | |
| | JCP | Azuma Kozutsumi | 15,049 | 6.2 | |
| Turnout | Turnout | Turnout | | 57.58 | 16.88 |
| | CDP hold | CDP hold | CDP hold | CDP hold |
The 2024 by-election in the constituency was called following the arrest and a court ruling of the former LDP state minister Mito Kakizawa, who was arrested and found guilty on vote buying charges.
The voter turnout was 40.70%, 18.03% lower than the previous election's 58.73%, marking the constituency's lowest.
2024 by-election :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Natsumi Sakai (Supported by the JCP, SDP) | 49,476 | 29.0 | 4.2 |
| | Independent | Genki Sudo (Endorsed by Reiwa Shinsengumi) | 29,669 | 17.4 | New |
| | Ishin | Yui Kanazawa (Endorsed by FEFA) | 28,461 | 16.7 | 2.1 |
| | CPJ | Akari Iiyama | 24,264 | 14.2 | New |
| | Independent | Hirotada Ototake (Endorsed by FnK, DPP) | 19,655 | 11.5 | New |
| | Sanseitō | Rina Yoshikawa | 8,639 | 5.1 | New |
| | Independent | Tsukasa Akimoto | 8,061 | 4.7 | New |
| | Anti-NHK | Katsuya Fukunaga | 1,410 | 0.8 | New |
| | Tsubasa | Ryosuke Nemoto | 1,110 | 0.7 | New |
| Registered electors | Registered electors | Registered electors | 430,285 | | |
| Turnout | Turnout | Turnout | 175,126 | 40.7 | 17.0 |
| | CDP gain from Independent | CDP gain from Independent | Swing | | |
2021 :
| Party | Party | Candidate | Votes | % | ±% |
| | Independent | Mito Kakizawa (incumbent - Tokyo PR) (endorsed by the LDP) | 76,251 | 32.0 | New |
| | CDP | Masae Ido$^‡$ (endorsed by the SDP) | 58,978 | 24.8 | New |
| | Ishin | Yui Kanazawa$^‡$ | 44,882 | 18.8 | New |
| | Independent | Hiroshi Imamura (endorsed by the LDP) | 26,628 | 11.2 | New |
| | Independent | Takashi Ino | 17,514 | 7.4 | 0.3 |
| | Japan First | Makoto Sakurai | 9,449 | 4.0 | New |
| | Independent | Koji Yoshida | 4,608 | 1.9 | New |
| Registered electors | Registered electors | Registered electors | 424,125 | | |
| Turnout | Turnout | Turnout | 249,089 | 58.7 | 3.1 |
| | Independent gain from LDP | Independent gain from LDP | Swing | | |
2017 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Tsukasa Akimoto$^‡$ (incumbent - Tokyo PR) (endorsed by Komeito) | 101,155 | 45.6 | 5.6 |
| | Kibō no Tō | Mito Kakizawa$^{‡‡}$ (incumbent) | 70,325 | 31.7 | New |
| | JCP | Toshio Yoshida | 34,943 | 15.7 | 1.1 |
| | Independent | Takashi Ino | 15,667 | 7.4 | 2.9 |
| Registered electors | Registered electors | Registered electors | 412,336 | | |
| Turnout | Turnout | Turnout | 229,218 | 55.6 | 0.4 |
| | LDP gain from Ishin | LDP gain from Ishin | Swing | 7.3 | |
2014 :
| Party | Party | Candidate | Votes | % | ±% |
| | Ishin | Mito Kakizawa$^‡$ (incumbent) (endorsed by the JRP) | 88.507 | 41.3 | New |
| | LDP | Tsukasa Akimoto$^{‡‡}$ (incumbent - Tokyo PR) (endorsed by Komeito) | 85,714 | 40.0 | 9.0 |
| | JCP | Toshio Yoshida | 31,384 | 14.6 | 6.8 |
| | Independent | Takashi Ino | 8,759 | 4.1 | New |
| Registered electors | Registered electors | Registered electors | 395,474 | | |
| Turnout | Turnout | Turnout | 221,584 | 56.0 | 8.1 |
| | Ishin gain from Your | Ishin gain from Your | Swing | | |
2012 :
| Party | Party | Candidate | Votes | % | ±% |
| | Your | Mito Kakizawa$^‡$ (incumbent - Tokyo PR) (endorsed by the JRP) | 88,222 | 36.9 | 21.2 |
| | LDP | Tsukasa Akimoto$^{‡‡}$ (endorsed by Komeito) | 74,159 | 31.0 | 1.3 |
| | Democratic | Mieko Tanaka$^‡$ | 29,355 | 12.3 | 30.1 |
| | JCP | Toshio Yoshida | 18,667 | 7.8 | 1.1 |
| | Tomorrow | Shozo Azuma$^‡$ (incumbent) (endorsed by the NDP) | 15,667 | 7.4 | New |
| Registered electors | Registered electors | Registered electors | 386,411 | | |
| Turnout | Turnout | Turnout | 247,496 | 64.1 | 3.2 |
| | Your gain from Democratic | Your gain from Democratic | Swing | 10.6 | |
2009 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Shozo Azuma$^‡$ | 105,131 | 42.4 | 7.2 |
| | LDP | Ben Kimura$^‡$ (incumbent) (endorsed by Komeito) | 80,054 | 32.3 | 22.2 |
| | Your | Mito Kakizawa$^{‡‡}$ | 38.808 | 15.7 | New |
| | JCP | Toshio Yoshida | 22,176 | 8.9 | 1.6 |
| Registered electors | Registered electors | Registered electors | 375,924 | | |
| Turnout | Turnout | Turnout | 229,218 | 67.3 | 0.8 |
| | Democratic gain from LDP | Democratic gain from LDP | Swing | 6.7 | |
2005 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Ben Kimura$^‡$ (incumbent - Tokyo PR) (endorsed by Komeito) | 123,021 | 54.4 | 5.6 |
| | Democratic | Shozo Azuma$^‡$ (incumbent) | 79,621 | 35.2 | 5.2 |
| | JCP | Toshio Yoshida | 23,659 | 10.5 | 0.5 |
| Registered electors | Registered electors | Registered electors | 348,023 | | |
| Turnout | Turnout | Turnout | 231,331 | 66.5 | 6.1 |
| | LDP hold | LDP hold | Swing | 6.5 | |
2003 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Ben Kimura$^‡$ | 69,164 | 35.4 | 7.3 |
| | Democratic | Shozo Azuma$^‡$ (incumbent - Tokyo PR) | 58,616 | 30.0 | 15.3 |
| | Independent Society | Koji Kakizawa | 47,843 | 24.5 | New |
| | JCP | Haruta Atsuyuki | 19,610 | 10.0 | 5.6 |
| Registered electors | Registered electors | Registered electors | 332,572 | | |
| Turnout | Turnout | Turnout | 200,707 | 60.4 | 2.1 |
| | LDP gain from Independent | LDP gain from Independent | Swing | 15.1 | |
2000 :
| Party | Party | Candidate | Votes | % | ±% |
| | Independent | Koji Kakizawa | 54,298 | 28.8 | 5.6 |
| | LDP | Ben Kimura$^‡$ (incumbent) | 52,892 | 28.1 | 22.9 |
| | JCP | Haruta Atsuyuki | 29,412 | 15.6 | 2.9 |
| | Democratic | Tatsuharu Mawatari$^‡$ | 27,654 | 14.7 | 15.8 |
| | Liberal | Shozo Azuma$^{‡‡}$ | 22,800 | 12.1 | New |
| | Independent | Kaoru Kondo | 1,302 | 0.7 | New |
| Registered electors | Registered electors | Registered electors | 309,356 | | |
| Turnout | Turnout | Turnout | 193,348 | 62.5 | |
| | Independent gain from LDP | Independent gain from LDP | Swing | N/A | |
1999 by-election :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Ben Kimura | 89,605 | 51.0 | 14.6 |
| | Democratic | Kazuko Yoshida | 53,490 | 30.5 | New |
| | JCP | Muneharu Fusa | 32,541 | 18.5 | 0.8 |
| Registered electors | Registered electors | Registered electors | | | |
| Turnout | Turnout | Turnout | | | |
| | LDP hold | LDP hold | Swing | 7.3 | |
1996 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Koji Kakizawa$^‡$ (incumbent - former Tokyo 6th) | 61,701 | 36.4 | New |
| | New Frontier | Akira Kuroyanagi | 46,969 | 27.7 | New |
| | JCP | Muneharu Fusa | 29,901 | 17.7 | New |
| | Democratic | Noboru Osawa | 28,181 | 16.6 | New |
| | Independent | Yoshihisa Kitaura | 2,629 | 1.6 | New |
| Registered electors | Registered electors | Registered electors | 293,912 | | |
| Turnout | Turnout | Turnout | 173,731 | 59.1 | New |
| | LDP win (new seat) | LDP win (new seat) | LDP win (new seat) | LDP win (new seat) | LDP win (new seat) |