# Tokyo 1st district

Tokyo 1st district (東京都第1区, Tōkyō-to dai-ikku or 東京1区, Tōkyō ikku) is a constituency of the House of Representatives in the Diet of Japan (national legislature). It is located in eastern mainland Tokyo and covers central parts of the former city of Tokyo. The district consists of the wards of Chiyoda (which includes the central government buildings) and Shinjuku. As of 2016, 514,974 eligible voters were registered in the district. Before redistricting in 2022, the district included a part of Minato ward which is now in the 7th district.
Before the electoral reform of 1994, the area had been part of Tokyo 1st district where three Representatives had been elected by single non-transferable vote.
The two main candidates contesting the district until 2009, Banri Kaieda (DPJ, Hatoyama group) and Kaoru Yosano (formerly LDP, without faction), had represented the old multi-member 1st district of Tokyo. In 2012, Yosano retired, and LDP newcomer Miki Yamada narrowly beat Kaieda, who was re-elected to a proportional seat leading the Democratic list in Tokyo with a sekihairitsu of 98.6%. Kaieda regained the seat in the 2017 election. The seat has been alternately won by Kaieda and Yamada since then.

## List of representatives

| Representative | Party | Dates | Notes |
| Kaoru Yosano | LDP | 1996–2000 | Lost. Failed re-election in the Tokyo PR block |
| Banri Kaieda | DPJ | 2000–2005 | Lost. Failed re-election in the Tokyo block |
| Kaoru Yosano | LDP | 2005–2009 | Lost. Re-elected in the Tokyo block |
| Banri Kaieda | DPJ | 2009–2012 | Lost. Re-elected in the Tokyo block |
| Miki Yamada | LDP | 2012–2017 | Lost. Re-elected in the Tokyo block |
| Banri Kaieda | CDP | 2017–2021 | Lost. Re-elected in the Tokyo block |
| Miki Yamada | LDP | 2021–2024 | |
| Banri Kaieda | CDP | 2024– | |

## Election results

2024 :
| Party | Party | Candidate | Votes | % | ±% |
| | Constitutional Democratic | Banri Kaieda | 56,979 | 32.01 | 3.42 |
| | Liberal Democratic | Miki Yamada | 55,040 | 30.92 | 8.09 |
| | Ishin | Shun Otokita | 29,002 | 16.29 | 7.41 |
| | Independent | Saori Satō | 12,255 | 6.88 | New |
| | Communist | Ken Nakano | 11,889 | 6.68 | New |
| | Sanseitō | Shōko Sakurai | 10,636 | 5.98 | New |
| | Anti-NHK | Hiroshi Takaki | 951 | 0.53 | New |
| | Independent | Hiroshi Arakaki | 716 | 0.40 | New |
| | Minor party | Nobuo Shindō | 530 | 0.30 | New |
| Turnout | Turnout | Turnout | | 55.60 | 0.67 |
| | Constitutional Democratic gain from Liberal Democratic | Constitutional Democratic gain from Liberal Democratic | Swing | 2.34 | |
2021 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic (Komeito) | Miki Yamada | 99,133 | 39.01 | 0.4 |
| | Constitutional Democratic | Banri Kaieda (elected by PR) | 90,043 | 35.43 | 5.3 |
| | Ishin | Taisuke Ono (elected by PR) | 60,230 | 23.70 | |
| | Independent | Hisae Naitō | 4,715 | 1.86 | |
| Turnout | Turnout | Turnout | | 56.27 | 2.23 |
| | Liberal Democratic gain from Constitutional Democratic | Liberal Democratic gain from Constitutional Democratic | Swing | 2.5 | |
2017 :
| Party | Party | Candidate | Votes | % | ±% |
| | Constitutional Democratic (JCP, SDP) | Banri Kaieda | 96,255 | 40.7 | 5.1 |
| | Liberal Democratic (Komeito) | Miki Yamada (elected by PR) | 93,234 | 39.4 | 3.3 |
| | Kibō no Tō | Kaoru Matsuzawa | 40,376 | 17.1 | New |
| | Happiness Realization | Miki Haraguchi | 3,806 | 1.6 | New |
| | Shōko Inumaru & Republican Party | Mitsuka Inumaru | 1,570 | 0.7 | New |
| | WECP | Mitsuo Matayoshi | 1,307 | 0.6 | +0.0 |
| Turnout | Turnout | Turnout | | 54.04 | 1.00 |
| | Constitutional Democratic gain from Liberal Democratic | Constitutional Democratic gain from Liberal Democratic | Swing | +4.4 | |
2014 :
| Party | Candidate | Votes | % | ±% |
| Liberal Democratic (Kōmeitō) | Miki Yamada | 107,015 | 42.7 | +13.4 |
| Democratic | Banri Kaieda | 89,232 | 35.6 | +6.7 |
| Communist | Naoki Tomita | 32,830 | 13.1 | +6.4 |
| Future Generations | Tōru Watanabe | 18,128 | 7.2 | new |
| Independent | Takanobu Nosaka | 2,209 | 0.9 | new |
| WECP | Mitsuo Matayoshi | 1,416 | 0.6 | +0.2 |
2012 :
| Party | Candidate | Votes | % |
| Liberal Democratic (Kōmeitō) | Miki Yamada | 82,013 | 29.3 |
| Democratic (People's New) | Banri Kaieda (elected by PR) | 80,879 | 28.9 |
| Restoration | Yoshitaka Katō | 48,083 | 17.2 |
| Your | Tarō Kosai | 31,554 | 11.3 |
| Communist | Naoki Tomita | 18,763 | 6.7 |
| Tomorrow (NP-Daichi) | Tetsuo Nozawa | 14,875 | 5.3 |
| Happiness Realization | Nozomi Itō | 1,999 | 0.7 |
| WECP | Mitsuo Matayoshi | 1,011 | 0.4 |
| Independent | Noriaki Kameyama | 614 | 0.2 |
2009 :
| Party | Party | Candidate | Votes | % |
| | Democratic (People's New) | Banri Kaieda | 141,742 | |
| | Liberal Democratic (Kōmeitō) | Kaoru Yosano (elected by PR) | 130,030 | |
| | Communist | Naoki Tomita | 19,288 | |
| | Happiness Realization | Junko Tanaka | 2,718 | |
| | Independent | Tetsuo Nozawa | 1,418 | |
| | Independent | Takekuni Kurosawa | 1,300 | |
| | Smile | Mac Akasaka (Makoto Tonami) | 987 | |
| | WECP | Jesus Matayoshi (Mitsuo Matayoshi) | 718 | |
| | Independent | Yoshinobu Maeda | 652 | |
| Turnout | Turnout | Turnout | 303,595 | 65.58 |
2005 :
| Party | Party | Candidate | Votes | % |
| | Liberal Democratic | Kaoru Yosano | 149,894 | |
| | Democratic | Banri Kaieda | 101,396 | |
| | Communist | Yasunobu Horie | 21,794 | |
| | WECP | Mitsuo Matayoshi | 1,557 | |
| Turnout | Turnout | Turnout | 278,974 | 65.25 |
2003 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Banri Kaieda | 105,222 | |
| | Liberal Democratic | Kaoru Yosano (elected by PR) | 103,785 | |
| | Communist | Fuminori Satō | 20,640 | |
| | Independent | Makiko Hamada | 5,572 | |
| | WECP | Mitsuo Matayoshi | 698 | |
| Turnout | Turnout | Turnout | 241,201 | 58.32 |
2000 :
| Party | Candidate | Votes |
| Democratic | Banri Kaieda | 93,173 |
| Liberal Democratic | Kaoru Yosano | 90,540 |
| Communist | Junko Ōtsuka | 36,525 |
| Liberal League | Yūsaku Hino | 3,118 |
| Independent | Jin Marukawa | 2,492 |
1996 :
| Party | Party | Candidate | Votes | % |
| | Liberal Democratic | Kaoru Yosano | 82,098 | |
| | Democratic | Banri Kaieda (elected by PR) | 63,661 | |
| | Communist | Junko Ōtsuka | 36,308 | |
| | New Frontier | Taizō Shibano | 27,424 | |
| Turnout | Turnout | Turnout | 215,312 | 55.99 |