# Tokyo 6th district

Tokyo 6th district is a constituency of the House of Representatives in the Diet of Japan (national legislature). It is located in Tokyo, and consists of a part of Setagaya, one of Tokyo's 23 special wards. With 2.18 times as many voters as Tokushima's 1st district, it had the lowest electoral weight throughout Japan in the election of 2005. In 2007 the Supreme Court dismissed a claim that the election in this and other Tokyo districts was unconstitutional and thus invalid. As of September 2012, 486,353 eligible voters were registered in the district, giving them the third lowest electoral weight in the country.
Before the electoral reform of 1994, Setagaya was part of Tokyo 3rd district, a three-member single non-transferable vote (SNTV) constituency. The post-reform single-member constituencies were used in the 1996 election for the first time.
Since its creation, the urban district had been dominated by opposition candidates until the landslide "postal privatization" election of 2005 when Liberal Democratic candidate Takao Ochi was able to defeat Democratic incumbent Yōko Komiyama by a slim margin. Komiyama was reelected via the Tokyo proportional representation block and ran again in Tokyo 6th district in the election of 2009. In 2012, Ochi received only less than a third of the vote but retook the district as the opposition to the LDP splintered. After Democratic representative Kōki Ishii had been stabbed to death in 2002 by a rightwing activist, a by-election was held on April 27, 2003.

## List of representatives

| Representative | Party | Dates | Notes |
| Tetsundo Iwakuni | NFP | 1996–2000 | |
| Kōki Ishii | DPJ | 2000–2002 | |
| Yōko Komiyama | DPJ | 2003–2005 | Re-elected in the Tokyo PR block |
| Takao Ochi | LDP | 2005–2009 | Failed re-election in the Tokyo block |
| Yōko Komiyama | DPJ | 2009–2012 | Failed re-election in the Tokyo block |
| Takao Ochi | LDP | 2012–2017 | Failed re-election in the Tokyo block |
| Takayuki Ochiai | CDP | 2017- | Incumbent |

## Election results

2024 :
| Party | Party | Candidate | ±% |
| | CDP | Takayuki Ochiai | |
| | LDP | Miwa Tsuchiya | |
| | Ishin | Kenichi Kawamura | |
| | Sanseitō | Masanori Mochizuki | New |
| Turnout | Turnout | Turnout | |
2021 :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Takayuki Ochiai | 110,169 | 40.1 | 0.7 |
| | LDP | Takao Ochi (elected by PR) | 105,186 | 38.3 | 1.7 |
| | Ishin | Rie Usui | 59,490 | 21.6 | New |
| Turnout | Turnout | Turnout | 274,845 | 60.36 | 4.9 |
| | CDP hold | CDP hold | CDP hold | CDP hold |
2017 :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Takayuki Ochiai | 100,400 | 40.8 | |
| | LDP | Takao Ochi (elected by PR) | 98,422 | 40.0 | 4.1 |
| | Kibō no Tō | Emiko Uematsu | 42,862 | 17.4 | |
| | Happiness Realization | Maki Nakaoka | 4,307 | 1.8 | |
| Turnout | Turnout | Turnout | | 55.4 | 0.0 |
| | CDP gain from LDP | CDP gain from LDP | CDP gain from LDP | CDP gain from LDP | CDP gain from LDP |
2014 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Takao Ochi | 110,872 | 44.1 | 11.2 |
| | Ishin | Takayuki Ochiai (elected by PR) | 88,915 | 35.4 | |
| | JCP | Takeshi Kishi | 51,595 | 20.5 | 12.2 |
| Turnout | Turnout | Turnout | | 55.4 | 7.9 |
| | LDP hold | LDP hold | LDP hold | LDP hold |
2012 :
| Party | Candidate | Votes | % |
| LDP (Kōmeitō) | Takao Ochi | 98,112 | 32.9 |
| DPJ (PNP) | Yōko Komiyama | 70,126 | 23.5 |
| JRP | Tomofumi Hanawa | 52,734 | 17.7 |
| YP | Takayuki Ochiai | 52,325 | 17.6 |
| JCP | Naoki Satō | 24,725 | 8.3 |
2009 :
| Party | Party | Candidate | Votes | % |
| | DPJ | Yōko Komiyama | 174,367.916 | |
| | LDP | Takao Ochi | 102,944.000 | |
| | JCP | Naoki Satō | 27,105.000 | |
| | Happiness Realization Party | Yōko Nakaoka | 4,986.083 | |
| Turnout | Turnout | Turnout | 316,412 | 65.67 |
2005 :
| Party | Party | Candidate | Votes | % |
| | LDP | Takao Ochi | 136,750 | 45.21 |
| | DPJ | Yōko Komiyama | 130,283 | 43.07 |
| | JCP | Miyoko Tanaka | 28,252 | 9.34 |
| Turnout | Turnout | Turnout | 302,484 | 65.03 |
2003 :
| Party | Party | Candidate | Votes | % |
| | DPJ | Yōko Komiyama | 131,715 | 50.71 |
| | LDP | Takao Ochi | 78,650 | 30.28 |
| | SDP | Nobuto Hosaka | 23,320 | 8.98 |
| | JCP | Miyoko Tanaka | 18,625 | 7.17 |
| Turnout | Turnout | Turnout | 259,727 | 56.54 |
2003 by-election :
| Party | Party | Candidate | Votes | % |
| | DPJ | Yōko Komiyama | 99,600 | 53.59 |
| | LDP | Michio Ochi | 57,783 | 31.09 |
| | JCP | Miyoko Tanaka | 20,486 | 11.02 |
| Turnout | Turnout | Turnout | 185,842 | 40.63 |
2000 :
| Party | Party | Candidate | Votes | % |
| | DPJ | Kōki Ishii | 93,919 | 36.16 |
| | LDP | Michio Ochi | 55,821 | 21.49 |
| | SDP | Nobuto Hosaka | 38,167 | 14.70 |
| | Liberal Party | Yoshio Suzuki | 30,914 | 12.28 |
| | JCP | Osamu Minase | 26,130 | 10.38 |
| | Liberal League | Rieko Saitō | 6,765 | 2,69 |
| Turnout | Turnout | Turnout | 251,716 | 58.26 |
1996 :
| Party | Party | Candidate | Votes | % |
| | NFP | Tetsundo Iwakuni | 82,106 | 34.46 |
| | LDP | Michio Ochi | 62,518 | 26.24 |
| | DPJ | Kōki Ishii | 52,014 | 21.83 |
| | JCP | Osamu Minase | 29,636 | 12.39 |
| | SDP | Hiroshi Ōmura | 10,384 | 4.36 |
| | Independent | Masaharu Kitazato | 1,590 | 0.67 |
| Turnout | Turnout | Turnout | 238,248 | |