Aichi 12th district

Aichi 12th district
Aichi 12th district
Parliamentary constituency; for the Japanese House of Representatives
	Numbered map of Aichi Prefecture single-member districts
Prefecture	Aichi
Proportional District	Tōkai
Electorate	444,148
Current constituency
Created	1994
Seats	One
Party	CDP
Representative	Kazuhiko Shigetoku
Municipalities	Okazaki and Nishio.

Aichi 12th district (愛知県第12区, Aichi-ken dai-ju-niku or simply 愛知12区, Aichi ju-niku) is a single-member constituency of the House of Representatives in the national Diet of Japan located in Aichi Prefecture.

Areas covered

List of representatives

Election	Representative
1996^[6]	Seiken Sugiura	Liberal Democratic
2000^[7]
2003^[8]
2005^[9]
2009^[10]	Yasuhiro Nakane	Democratic
2012^[11]	Shuhei Aoyama	Liberal Democratic
2014^[12]	Kazuhiko Shigetoku	Innovation
		Independent
		Vision of Reform
		Democratic
2017^[13]		Independent
2021^[14]		CDP

Election results

2024 • 2021 • 2017 • 2014 • 2012 • 2009 • 2005 • 2003 • 2000 • 1996

2024

2024^[15]
Party		Candidate	Votes	%	±%
	CDP	Kazuhiko Shigetoku	126,940	50.46	2.21
	Liberal Democratic	Shuhei Aoyama	86,025	34.19	13.14
	Innovation	Hiroto Nakagawa	28,429	11.32
	Communist	Hisakazu Seki	10,118	4.02	New
Majority			40,915	16.27	10.93
Registered electors			442,431
Turnout			251,572	58.05	3.92
	CDP hold

2021

2021^[14]
Party		Candidate	Votes	%	±%
	CDP	Kazuhiko Shigetoku (incumbent)	142,536	52.67	New
	Liberal Democratic (endorsed by Komeito)	Shuhei Aoyama (PR seat incumbent) (won PR seat)	128,083	47.33
Majority			14,453	5.34
Registered electors			444,780
Turnout				61.97	0.25
	CDP hold

2017

2017^[13]
Party		Candidate	Votes	%	±%
	Independent	Kazuhiko Shigetoku (incumbent)	149,587	55.65	New
	Liberal Democratic (endorsed by Komeito)	Shuhei Aoyama (PR seat incumbent)	104,811	39.00
	Communist	Isao Miyaji	14,378	5.35
Majority			44,776	16.65
Registered electors			444,298
Turnout				61.72	0.82
	Independent hold

Aoyama was additionally elected by Tokai proportional representation block following Sei Ōmi's resignation(running in a Anjō mayoral election).

2014

2014^[12]
Party		Candidate	Votes	%	±%
	Innovation	Kazuhiko Shigetoku (PR seat incumbent)	131,618	48.49	New
	Liberal Democratic (endorsed by Komeito)	Shuhei Aoyama (incumbent) (won PR seat)	118,165	43.54
	Communist	Jiro Makino	21,637	7.97
Majority			13,453	4.95
Registered electors			458,221
Turnout				60.90	2.95
	Ishin gain from LDP

2012

2012^[11]
Party		Candidate	Votes	%	±%
	Liberal Democratic (endorsed by Komeito)	Shuhei Aoyama	91,816	32.34
	Democratic (endorsed by PNP)	Yasuhiro Nakane (incumbent) (won PR seat)	82,363	29.01
	Restoration (endorsed by Your)	Kazuhiko Shigetoku (won PR seat)	69,198	24.37	New
	Tomorrow (endorsed by Daichi)	Yuzuru Tsuzuki (PR seat incumbent)	30,850	10.87	New
	Communist	Haruji Wakayama	9,687	3.41
Majority			9,453	3.33
Registered electors			454,656
Turnout				63.85	10.22
	LDP gain from Democratic

2009

2009^[10]
Party		Candidate	Votes	%	±%
	Democratic	Yasuhiro Nakane	180,972	55.36
	Liberal Democratic	Seiken Sugiura (incumbent)	122,198	37.38
	Communist	Hiroko Hatta	20,551	6.29
	Happiness Realization	Yoshiki Gokan	3,171	0.97	New
Majority			58,774	17.98
Registered electors			448,205
Turnout				74.07	2.99
	Democratic gain from LDP

2005

2005^[9]
Party		Candidate	Votes	%	±%
	Liberal Democratic	Seiken Sugiura (incumbent)	159,256	52.62
	Democratic	Yasuhiro Nakane (PR seat incumbent)	128,681	42.52
	Communist	Noboru Hagiwara	14,708	4.86
Majority			30,575	10.10
Registered electors			432,843
Turnout				71.08	6.44
	LDP hold

2003

2003^[8]
Party		Candidate	Votes	%
	Liberal Democratic	Seiken Sugiura (incumbent)	135,622	50.38
	Democratic	Yasuhiro Nakane (won PR seat)	117,411	43.61
	Communist	Noriko Nomura	16,191	6.01
Majority			18,211	6.77
Registered electors			424,973
Turnout				64.64
	LDP hold

2000

2000^[7]
Party		Candidate	Votes	%	±%
	Liberal Democratic	Seiken Sugiura (incumbent)	117,475	45.56
	Democratic	Yasuhiro Nakane	81,826	31.73	New
	Liberal	Yuzuru Tsuzuki (won PR seat)	33,052	12.82	New
	Communist	Noriko Nomura	21,581	8.37
	Liberal League	Takashi Kawashima	2,517	0.98	New
	Independent	Akira Fukuda	1,422	0.55	New
Majority			35,649	13.83
Turnout
	LDP hold

1996

1996^[6]
Party		Candidate	Votes	%	±%
	Liberal Democratic	Seiken Sugiura	133,257	55.16	New
	New Frontier	Minoru Kawashima	79,950	33.10	New
	Communist	Masumi Yamada	28,358	11.74	New
Majority			53,307	22.06
Turnout
	LDP win (new seat)

References

^ Ministry of Internal Affairs and Communications (MIC): [1] (in Japanese)
^ "衆議院トップページ >立法情報 >制定法律情報 >第193回国会　制定法律の一覧 >衆議院議員選挙区画定審議会設置法及び公職選挙法の一部を改正する法律の一部を改正する法律法律第五十八号（平二九・六・一六）". House of Representatives of Japan. 1994-11-25. Retrieved 2021-10-02.
^ "愛知県" (PDF). Ministry of Internal Affairs and Communications. Retrieved 2023-01-09.
^ "衆議院トップページ >立法情報 >制定法律情報 >第183回国会　制定法律の一覧 >衆議院小選挙区選出議員の選挙区間における人口較差を緊急に是正するための公職選挙法及び衆議院議員選挙区画定審議会設置法の一部を改正する法律の一部を改正する法律法律第六十八号（平二五・六・二八）". House of Representatives of Japan. 2013-06-28. Retrieved 2021-10-02.
^ "衆議院トップページ >立法情報 >制定法律情報 >第131回国会　制定法律の一覧 >法律第百四号（平六・一一・二五）". House of Representatives of Japan. 1994-11-25. Retrieved 2021-10-02.
^ ^a ^b "第41回衆議院議員選挙 - 愛知12区". Senkyo.com (in Japanese). Retrieved 2023-10-29.
^ ^a ^b "第42回衆議院議員選挙 - 愛知12区". Senkyo.com (in Japanese). Retrieved 2023-10-29.
^ ^a ^b "第43回衆議院議員選挙 - 愛知12区". Senkyo.com (in Japanese). Retrieved 2023-10-29.
^ ^a ^b "第44回衆議院議員選挙 - 愛知12区". the Asahi Shinbun (in Japanese). Retrieved 2023-10-29.
^ ^a ^b "第45回衆議院議員選挙 - 愛知12区". the Asahi Shinbun (in Japanese). Retrieved 2023-10-29.
^ ^a ^b "開票結果小選挙区愛知". Yomiuri Shimbun (in Japanese). Retrieved 2023-10-29.
^ ^a ^b "2014衆院選:衆議院選挙:選挙アーカイブス:NHK選挙WEB". NHK (in Japanese). Retrieved 2023-10-29.
^ ^a ^b "2017衆院選:衆議院選挙:選挙アーカイブス:NHK選挙WEB". Yomiuri Shimbun (in Japanese). Retrieved 2023-10-08.
^ ^a ^b "2021年衆議院総選挙　愛知12区". NHK (in Japanese). Retrieved 2023-10-08.
^ 日本放送協会. "衆議院選挙2024 埼玉(川越・越谷など)開票速報・選挙結果 NHK". www.nhk.or.jp (in Japanese). Retrieved 2025-03-31.

[1] Ministry of Internal Affairs and Communications (MIC): [1] (in Japanese)

[2] "衆議院トップページ >立法情報 >制定法律情報 >第193回国会　制定法律の一覧 >衆議院議員選挙区画定審議会設置法及び公職選挙法の一部を改正する法律の一部を改正する法律法律第五十八号（平二九・六・一六）". House of Representatives of Japan. 1994-11-25. Retrieved 2021-10-02.

[3] "愛知県" (PDF). Ministry of Internal Affairs and Communications. Retrieved 2023-01-09.

[4] "衆議院トップページ >立法情報 >制定法律情報 >第183回国会　制定法律の一覧 >衆議院小選挙区選出議員の選挙区間における人口較差を緊急に是正するための公職選挙法及び衆議院議員選挙区画定審議会設置法の一部を改正する法律の一部を改正する法律法律第六十八号（平二五・六・二八）". House of Representatives of Japan. 2013-06-28. Retrieved 2021-10-02.

[5] "衆議院トップページ >立法情報 >制定法律情報 >第131回国会　制定法律の一覧 >法律第百四号（平六・一一・二五）". House of Representatives of Japan. 1994-11-25. Retrieved 2021-10-02.

[elect96-6] "第41回衆議院議員選挙 - 愛知12区". Senkyo.com (in Japanese). Retrieved 2023-10-29.

[elect00-7] "第42回衆議院議員選挙 - 愛知12区". Senkyo.com (in Japanese). Retrieved 2023-10-29.

[elect03-8] "第43回衆議院議員選挙 - 愛知12区". Senkyo.com (in Japanese). Retrieved 2023-10-29.

[elect05-9] "第44回衆議院議員選挙 - 愛知12区". the Asahi Shinbun (in Japanese). Retrieved 2023-10-29.

[elect09-10] "第45回衆議院議員選挙 - 愛知12区". the Asahi Shinbun (in Japanese). Retrieved 2023-10-29.

[elect12-11] "開票結果小選挙区愛知". Yomiuri Shimbun (in Japanese). Retrieved 2023-10-29.

[elect14-12] "2014衆院選:衆議院選挙:選挙アーカイブス:NHK選挙WEB". NHK (in Japanese). Retrieved 2023-10-29.

[elect17-13] "2017衆院選:衆議院選挙:選挙アーカイブス:NHK選挙WEB". Yomiuri Shimbun (in Japanese). Retrieved 2023-10-08.

[elect21-14] "2021年衆議院総選挙　愛知12区". NHK (in Japanese). Retrieved 2023-10-08.

[15] 日本放送協会. "衆議院選挙2024 埼玉(川越・越谷など)開票速報・選挙結果 NHK". www.nhk.or.jp (in Japanese). Retrieved 2025-03-31.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

[10]

[11]

[12]

[13]

[14]

[15]

Aichi's electoral districts for the Diet of Japan
FPTP "small" districts (1996–present) 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 PR part of the Tōkai PR block (21 seats) House of Councillors At-large (15→16 Representatives, 6→8 Councillors)
SNTV "medium-sized" districts (1947–1993) 1 2 3 4 5 6 (19→22 Representatives, 6 Councillors)
Limited voting "large" districts (1946) 1 2 (18 Representatives)
SNTV "medium-sized" districts (1928–1942) 1 2 3 4 5 (17 Representatives)
FPTP/SNTV "small" districts (1920–1924) 1 2 3 4 5 6 7 8 9 10 11 12 13 (17 Representatives)
SNTV "large" districts (1902–1917) Nagoya city counties (gunbu) (13 Representatives)
FPTP/bloc voting "small" districts (1890–1898) 1 2 3 4 5 6 7 8 9 10 11 (11 Representatives)

First-past-the-post (FPTP) districts and proportional representation (PR) "blocks" for the Japanese House of Representatives of the National Diet (1996–present)
Speaker of the House of Representatives of Japan: Fukushiro Nukaga, Ibaraki 2nd Vice Speaker of the House of Representatives of Japan: Banri Kaieda, Tokyo PR
Hokkaidō	Block 8 seats Hokkaidō 1 2 3 4 5 6 7 8 9 10 11 12
Tōhoku	Block 12 seats Aomori 1 2 3 Iwate 1 2 3 Miyagi 1 2 3 4 5 Akita 1 2 3 Yamagata 1 2 3 Fukushima 1 2 3 4
Kita- (North) Kantō	Block 19 seats Ibaraki 1 2 3 4 5 6 7 Tochigi 1 2 3 4 5 Gunma 1 2 3 4 5 Saitama 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Minami- (South) Kantō	Block 23 seats Chiba 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Kanagawa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Yamanashi 1 2
Tokyo	Block 19 seats Tokyo 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Hokuriku-Shin'etsu	Block 10 seats Niigata 1 2 3 4 5 Toyama 1 2 3 Ishikawa 1 2 3 Fukui 1 2 Nagano 1 2 3 4 5
Tōkai	Block 21 seats Gifu 1 2 3 4 5 Shizuoka 1 2 3 4 5 6 7 8 Aichi 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 Mie 1 2 3 4
Kinki	Block 28 seats Shiga 1 2 3 Kyoto 1 2 3 4 5 6 Osaka 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Hyōgo 1 2 3 4 5 6 7 8 9 10 11 12 Nara 1 2 3 Wakayama 1 2
Chūgoku	Block 10 seats Tottori 1 2 Shimane 1 2 Okayama 1 2 3 4 Hiroshima 1 2 3 4 5 6 Yamaguchi 1 2 3
Shikoku	Block 6 seats Tokushima 1 2 Kagawa 1 2 3 Ehime 1 2 3 Kōchi 1 2
Kyūshū	Block 20 seats Fukuoka 1 2 3 4 5 6 7 8 9 10 11 Saga 1 2 Nagasaki 1 2 3 Kumamoto 1 2 3 4 Ōita 1 2 3 Miyazaki 1 2 3 Kagoshima 1 2 3 4 Okinawa 1 2 3 4
Former districts	Abolished in 2002 Hokkaido 13 Yamagata 4 Shizuoka 9 Shimane 3 Oita 4 Abolished in 2013 Fukui 3 Yamanashi 3 Tokushima 3 Kochi 3 Saga 3 Abolished in 2017 Aomori 4 Iwate 4 Mie 5 Nara 4 Kumamoto 5 Kagoshima 5 Abolished in 2022 Miyagi 6 Fukushima 5 Niigata 6 Shiga 4 Wakayama 3 Okayama 5 Hiroshima 7 Yamaguchi 4 Ehime 4 Nagasaki 4