Tokyo 10th district

Tokyo 10th district is a constituency of the House of Representatives in the Diet of Japan (national legislature). As of 2012, 351,821 eligible voters were registered in the district.[1] It covers northwestern parts of the former city of Tokyo. Originally it consisted of the ward of Toshima and parts of Nerima, but after redistricting in 2017 it comprises parts of four wards, Toshima, Nerima, Nakano and Shinjuku.

Tokyo 10th District
Parliamentary constituency
for the Japanese House of Representatives
Numbered map of inner Tokyo single-member districts
PrefectureTokyo
Proportional DistrictTokyo
Electorate351,821 (2012)
Current constituency
Created1994
SeatsOne
PartyLDP
RepresentativeHayato Suzuki
Created fromTokyo 5th district
WardsParts of Toshima, Nerima, Nakano and Shinjuku

Before the electoral reform of 1994, the area had been part of Tokyo 5th district where three Representatives had been elected by single non-transferable vote. Until her successful gubernatorial bid in 2016, Liberal Democrat Yuriko Koike had represented the district. Koike, formerly a representative for Hyōgo 6th district, had taken over Tokyo 10th district in 2005 as one of Jun’ichirō Koizumi's "female assassins" to take out postal privatization rebel Kōki Kobayashi. In the landslide election of 2009, she lost the district to Takako Ebata (DPJ, Ozawa group), one of the so-called "Ozawa girls" (小沢ガールズ, Ozawa gāruzu), a group of female first-time candidates handpicked by DPJ ex-chairman Ichirō Ozawa.

The current representative, elected in the 2017 general election, is Hayato Suzuki.

List of representatives
Representative Party Dates Notes
Kōki Kobayashi LDP 1996–2005 postal privatization rebel in 2005, joined New Party Nippon
Yuriko Koike LDP 2005–2009 Re-elected in the Tokyo PR block, minister of state in the 2nd and 3rd Koizumi Cabinets and the 1st Abe Cabinet
Takako Ebata DPJ 2009–2012 Failed re-election in the Tokyo block
Yuriko Koike LDP 2012–2016 Forfeited seat on July 14, 2016 when she became a candidate in the gubernatorial election[2]
Vacant (July – October 2016)
Masaru Wakasa LDP 2016–2017 Submitted his resignation from the LDP ahead of the 2017 Tokyo prefectural election to support Koike's new party. The LDP accepted his exit on July 3, 2017.[3]
Kibō 2017
Hayato Suzuki LDP 2017-

Election results
2021[4]
Party Candidate Votes % ±%
Liberal Democratic Hayato Suzuki (supported by Kōmeitō) 115,122 43.80 Increase6.43
CDP Yōsuke Suzuki (elected by PR) 107,920 41.06 Increase12.29
Innovation Takashi Fujikawa 30,574 11.63
Independent Tōru Koyama 4,684 1.78 Increase0.92
New Party for Japanese Kokoro Yūji Sawaguchi 4,552 1.73
Turnout 56.50 Increase3.55
Liberal Democratic hold Swing Decrease2.4
2017[5]
Party Candidate Votes % ±%
Liberal Democratic Hayato Suzuki (supported by Kōmeitō) 91,146 37.4 N/A
CDP Yōsuke Suzuki 70,168 28.8 N/A
Kibō no Tō Masaru Wakasa 57,901 23.7 -36.6
Communist Yoshinobu Kishi 20,828 8.5 N/A
Independent Tōru Koyama 2,107 0.9 N/A
Happiness Realization Toshimitsu Yoshii 1,744 0.7 -1.5
2016[6]
Party Candidate Votes % ±%
LDP (K) Masaru Wakasa 75,755 60.3 new
DP (Seikatsusha Net, SDP) Yōsuke Suzuki 47,141 37.5 new
HRP Toshimitsu Yoshii 2,824 2.2 new
Turnout 127,965 37.85 -18.71
2014[7]
Party Candidate Votes % ±%
LDP (K) Yuriko Koike 93,610 50.7 -3.0
DPJ Takako Ebata 44,123 23.9 +0.5
JCP Hideko Kon 28,453 15.4 +4.5
PLP Ryō Tagaya 9,663 5.2 -6.8
PFG Chizuko Kamitani 8,688 4.7 new
2012[8]
Party Candidate Votes % ±%
LDP (NK) Yuriko Koike 108,983 53.7 +10.4
DPJ (PNP) Takako Ebata 47,493 23.4 -23.8
TPJ (NPD) Ryō Tagaya 24,414 12.0 +12.0
JCP Hideko Kon 22,044 10.9 +1.5
2009[9]
Party Candidate Votes % ±%
DPJ (PNP support) Takako Ebata 105,512 47.2 +24.2
LDP (Kōmeitō support) Yuriko Koike (elected by PR) 96,739 43.3 -6.8
JCP Toshie Yamamoto 21,092 9.4 +1.2
Turnout 227,220 65.66
2005[10]
Party Candidate Votes % ±%
Liberal Democratic Yuriko Koike 109,764 50.1 +4.9
Democratic Muneaki Samejima 50,536 23.0 -19.7
New Party Nippon Kōki Kobayashi 41,089 18.7 +18.7
Communist Toshie Yamamoto 17,929 8.2 -2.5
Turnout 222,096 66.55
2003[11]
Party Candidate Votes % ±%
Liberal Democratic Kōki Kobayashi 81,979 45.2 +6.4
Democratic Muneaki Samejima (elected by PR) 77,417 42.7 +7.8
Communist Toshie Yamamoto 19,338 10.7 -5.6
Japan Nation Party Sakae Shirai 2,706 1.4 +1.4
Turnout 187,204 56.27
2000[12]
Party Candidate Votes % ±%
Liberal Democratic Kōki Kobayashi 71,318 38.8 -8.1
Democratic Muneaki Samejima (elected by PR) 64,272 34.9 +34.9
Communist Toshie Yamamoto 29,907 16.3 +0.4
LP Hiromasa Hotta 18,509 10.1 +10.1
1996[13]
Party Candidate Votes % ±%
Liberal Democratic Kōki Kobayashi 52,787 30.7
New Frontier Muneaki Samejima 45,536 26.4
Democratic Akira Nagatsuma 33,480 19.4
Communist Ken Nakano 27,230 15.8
Social Democratic Hideki Tanaka 8,394 4.9
Independent Akito Kamojima 4,745 2.8
Turnout 176,190 55.59

References
  1. Ministry of Internal Affairs and Communications (MIC): 平成21年9月2日現在における選挙人名簿及び在外選挙人名簿登録者数の概要 (in Japanese)
  2. Sankei News, July 14, 2016: 小池百合子氏、都知事選出馬で議員失職　１０月に衆院補選
  3. The Japan News, July 4, 2017: LDP accepts Koike leaving party Archived 2017-07-05 at the Wayback Machine
  4. 開票速報 小選挙区：東京 - 2021衆議 (in Japanese). NHK. Retrieved 8 December 2021.
  5. "開票結果　小選挙区　東京". sp.yomiuri.co.jp (in Japanese). Yomiuri Shimbun. 2017. Archived from the original on October 23, 2017. Retrieved 21 May 2023.
  6. Tokyo Metropolitan Government, election commission: Turnout and result of the October 23, 2016 election of a member of the House of Representatives (in Japanese)
  7. 総選挙2014>開票結果 小選挙区 東京. Yomiuri Shimbun (in Japanese). Retrieved 2016-08-01.
  8. 総選挙2012>開票結果 小選挙区 東京. Yomiuri Shimbun (in Japanese). Retrieved 2013-02-27.
  9. 衆議院>第45回衆議院議員選挙>東京都>東京10区. ザ･選挙 (in Japanese). JANJAN. Retrieved 2009-09-09.
  10. 衆議院>第44回衆議院議員選挙>東京都>東京10区. ザ･選挙 (in Japanese). JANJAN. Retrieved 2010-09-09.
  11. 衆議院>第43回衆議院議員選挙>東京都>東京10区. ザ･選挙 (in Japanese). JANJAN. Retrieved 2010-09-09.
  12. 衆議院>第42回衆議院議員選挙>東京都>東京10区. ザ･選挙 (in Japanese). JANJAN. Retrieved 2010-09-09.
  13. 衆議院>第41回衆議院議員選挙>東京都>東京10区. ザ･選挙 (in Japanese). JANJAN. Archived from the original on 2009-08-17. Retrieved 2010-09-09.

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