Tokyo 20th district

Tokyo 20th District (東京都第20区, Tokyo-to dai-niju-ku) is an electoral district of the Japanese House of Representatives. The district was created in 1994 as part of the move to single-member districts that same year, and the district is currently represented by the Liberal Democratic Party's Seiji Kihara.

Tokyo 20th District
東京都第20区
Parliamentary constituency
for the Japanese House of Representatives
PrefectureTokyo
Proportional BlockTokyo
Electorate419,465 (as of 1 September 2022)[1]
Current constituency
Created1994
SeatsOne
PartyLDP
RepresentativeSeiji Kihara

Areas Covered

As of 13 January 2023, the areas covered by this district area as follows:[2][3]

Since its creation in 1994, the borders of this district have so far not been changed.

Elected Representatives
Representative Party Years Served Notes
Yuriko Ono NFP 1996-2000
Koichi Kato DPJ 2000-2005
Seiji Kihara LDP 2005-2009
Koichi Kato DPJ 2009-2012
Seiji Kihara LDP 2012- Incumbent

Election Results

‡ - Also ran in the Tokyo PR district

‡‡ - Also ran and won in the Tokyo PR district

2021[4]
Party Candidate Votes % ±%
Liberal Democratic Seiji Kihara‡ (Incumbent)
(Endorsed by Komeito) 		121,621 52.6 Increase2.7
Communist Toru Miyamoto‡ (Incumbent - Tokyo PR)
(Endorsed by the SDP)		 66,516 28.8 Increase2.0
Innovation Junichiro Maeda‡ 43,089 18.6 New
Registered electors 418,245
Turnout 237,438 56.8 Increase3.2
Liberal Democratic hold Swing Increase2.5
2017[5]
Party Candidate Votes % ±%
Liberal Democratic Seiji Kihara‡ (Incumbent)
(Endorsed by Komeito) 		107,686 49.9 Decrease2.2
Communist Toru Miyamoto‡ (Incumbent - Tokyo PR)
(Endorsed by the SDP)		 57,741 26.8 Increase2.5
Kibō no Tō Akira Shikano‡ 50,439 23.4 New
Registered electors 415,565
Turnout 222,909 53.6 Decrease0.9
Liberal Democratic hold Swing Decrease7.0
2014[6]
Party Candidate Votes % ±%
Liberal Democratic Seiji Kihara‡ (Incumbent)
(Endorsed by Komeito) 		110,273 52.1 Increase11.7
Democratic Mitsuaki Takeda‡
(Endorsed by the JIP)		 51,362 24.3 Decrease1.1
Communist Mariko Ikeda 49,902 23.6 Increase10.0
Registered electors 404,949
Turnout 220,576 54.5 Increase3.2
Liberal Democratic hold Swing Increase8.1
2012[7]
Party Candidate Votes % ±%
Liberal Democratic Seiji Kihara‡
(Endorsed by Komeito) 		98,070 40.4 Increase4.4
Democratic Koichi Kato‡ (Incumbent)
(Endorsed by the PNP)		 61,519 25.4 Decrease25.8
Restoration Kazusa Noda‡ 50,031 20.6 New
Communist Mariko Ikeda 33,092 13.6 Increase1.8
Registered electors 402,763
Turnout 254,264 63.1 Decrease5.0
Liberal Democratic gain from Democratic Swing Increase5.5
2009[8]
Party Candidate Votes % ±%
Democratic Koichi Kato‡ (Incumbent - Tokyo PR)
(Endorsed by the SDP) 		136,294 51.2 Increase2.7
Liberal Democratic Seiji Kihara‡ (Incumbent) 95,718 36.0 Decrease6.6
Communist Mariko Ikeda‡ 31,475 11.8 Decrease1.0
Happiness Realization Kazuyuki Abe 2,560 1.0 New
Registered electors 398,174
Turnout 271,157 68.1 Increase1.1
Democratic gain from Liberal Democratic Swing Increase5.1
2005[9]
Party Candidate Votes % ±%
Liberal Democratic Seiji Kihara‡ 112,634 44.6 Increase7.4
Democratic Toru Miyamoto‡‡ (Incumbent) 107,916 42.7 Decrease8.0
Communist Mariko Ikeda‡ 32,299 12.8 Increase0.7
Registered electors 388,041
Turnout 259,794 67.0 Increase6.9
Liberal Democratic gain from Democratic Swing Increase3.7
2003[10]
Party Candidate Votes % ±%
Democratic Koichi Kato‡ (Incumbent) 111,041 50.7 Increase11.2
Liberal Democratic Seiichiro Shimizu‡ 81,588 37.2 New
Communist Mariko Ikeda 26,434 12.1 Decrease3.1
Registered electors 380,991
Turnout 237,438 60.1 Decrease4.8
Democratic hold Swing Increase15.2
2000[11]
Party Candidate Votes % ±%
Democratic Koichi Kato‡ 93,236 39.5 Increase19.2
Komeito Yuriko Ono‡ 58,613 24.8 Increase2.0
Independent Seiichiro Shimizu 48,613 20.6 New
Communist Ikuo Suzuki 35,826 15.2 Decrease1.9
Registered electors 371,592
Turnout 241,052 64.9
Democratic gain from New Frontier Swing Increase9.6
1996[12]
Party Candidate Votes % ±%
New Frontier Yuriko Ono 55,559 27.0 New
Liberal Democratic Seiichiro Shimizu‡ 54,582 26.5 New
Democratic Shino Nakano‡ 41,705 20.3 New
Communist Nobuhiro Maesawa 35,150 17.1 New
Independent Naoko Asaki 13,957 6.8 New
New Socialist Etsuko Nagata 4,878 2.4 New
Registered electors 360,803
Turnout 210,925 58.5 N/A
New Frontier win (new seat)

References
  1. "令和4年9月1日現在選挙人名簿及び在外選挙人名簿登録者数" [Ministry of Internal Affairs and Communications - Number of registered voters as of 1 September 2022]. Ministry of Internal Affairs and Communications (in Japanese). Retrieved 2023-01-13.
  2. "法律第百四号（平六・一一・二五）". www.shugiin.go.jp. Japanese House of Representatives. 1994. Retrieved 2023-01-13.
  3. "東 京 都" [Tokyo] (PDF). Ministry of Internal Affairs and Communications (in Japanese). 2022. Retrieved 2023-01-13.
  4. "東京20区 - 第49回衆議院議員選挙" [Tokyo 20th District - 49th House of Representatives General Election]. go2senyko.com (in Japanese). Retrieved 2023-01-13.
  5. "東京20区 - 第48回衆議院議員選挙" [Tokyo 20th District - 48th House of Representatives General Election]. go2senyko.com (in Japanese). Retrieved 2023-01-13.
  6. "東京20区 - 第47回衆議院議員選挙" [Tokyo 20th District - 47th House of Representatives General Election]. go2senyko.com (in Japanese). Retrieved 2023-01-13.
  7. "東京20区 - 第46回衆議院議員選挙" [Tokyo 20th District - 46th House of Representatives General Election]. go2senyko.com (in Japanese). Retrieved 2023-01-13.
  8. "東京20区 - 第45回衆議院議員選挙" [Tokyo 20th District - 45th House of Representatives General Election]. go2senyko.com (in Japanese). Retrieved 2023-01-13.
  9. "東京20区 - 第44回衆議院議員選挙" [Tokyo 20th District - 44th House of Representatives General Election]. go2senyko.com (in Japanese). Retrieved 2023-01-13.
  10. "東京20区 - 第43回衆議院議員選挙" [Tokyo 20th District - 43rd House of Representatives General Election]. go2senyko.com (in Japanese). Retrieved 2023-01-13.
  11. "東京20区 - 第42回衆議院議員選挙" [Tokyo 20th District - 42nd House of Representatives General Election]. go2senyko.com (in Japanese). Retrieved 2023-01-13.
  12. "東京20区 - 第41回衆議院議員選挙" [Tokyo 20th District - 41st House of Representatives General Election]. go2senyko.com (in Japanese). Retrieved 2023-01-13.
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