Southern Kanto proportional representation block

Southern Kanto Proportional Representation Block
Southern Kanto Proportional Representation Block
Parliamentary constituency; for the Japanese House of Representatives
	Map of House of Representatives proportional blocks, with the Southern Kanto block highlighted
Prefectures	Chiba, Kanagawa, and Yamanashi
Electorate	13,605,378 (2026)
Current constituency
Created	1994
Number of members	23

The Southern Kantō proportional representation block (Hirei [daihyō] Minami-Kantō burokku (比例[代表]南関東ブロック)) is one of eleven proportional representation (PR) "blocks", multi-member constituencies for the House of Representatives in the Diet of Japan. It consists of Southern parts of the Kantō region covering Chiba, Kanagawa and Yamanashi prefectures. Following the introduction of proportional voting it initially elected 23 representatives in the 1996 general election, then 21 after the total number of PR seats had been reduced from 200 to 180. After reapportionment in 2002 the number was increased to 22 representatives and again to 23 in 2022.

Results timeline

Vote share

Party		1996	2000	2003	2005	2009	2012	2014	2017	2021	2024	2026
	LDP	28.99	24.74	34.62	42.40	25.99	26.43	33.96	34.28	34.94	25.40	35.56
	NFP	26.55
	DPJ^[a]	21.21	27.68	39.98	29.47	42.99	17.31	17.61
	JCP	14.04	11.53	7.39	6.85	7.00	5.86	11.90	8.01	7.21	6.10	4.24
	SDP	6.43	9.56	4.26	5.37	4.30	1.93	1.94	1.27	1.68	1.53	1.24
	Komeito		12.43	13.75	12.17	10.03	10.61	12.81	11.46	11.47	10.17
	LP		11.98
	Nippon				3.74	0.93
	Your					7.04	12.45
	PNP					1.20
	Ishin^[b]						18.89	15.41	3.92	11.65	7.47	6.25
	TPJ						6.25
	PLP							2.57
	CDP								23.46	22.28	23.70
	KnT								17.23
	DPFP									5.19	12.64	10.63
	Reiwa									4.08	6.59	2.73
	Sanseitō										3.72	7.16
	CPJ										2.66	2.49
	CRA											19.21
	Mirai											9.20
Others		2.78^[c]	2.08^[d]			0.51^[e]	0.27^[f]	3.81^[g]	0.38^[h]	1.50^[i]		1.29^[j]

Turnout			59.47	57.60	66.29	67.26	59.53	53.13	51.62	55.48	53.72	55.07

Seat distribution

Election	Distribution	Seats
1996		23
2000		21
2003		22
2005		22
2009		22
2012		22
2014		22
2017		22
2021		22
2024		23
2026		23

List of representatives

Note: Party affiliations as of election day.

1996–	2000–	2003–	2005–	2009–	2012–
Kazuo Shii
Masahiro Nakaji	Takeshi Ōmori	Tomoko Abe			Tomoko Abe
Takeshi Ōmori	Tomoko Abe	Hiroyuki Nagahama	Hiroyuki Nagahama resigned 2007, replaced by Hirohisa Fujii	Kazuya Mimura	Yūichi Gotō
Shigeru Itō	Yōko Hara	Motohisa Ikeda	Hitoshi Gotō	Ken'ichi Kaneko	Sōichirō Okuno
Shun Hayama	Kimiaki Matsuzaki	Yasuhiko Wakai	Hirofumi Ryū	Atsushi Chūgo	Yasuhiko Wakai
Sakihito Ozawa	Shun Hayama	Naohiko Katō	Hisayasu Nagata resigned 2006, replaced by Motohisa Ikeda	Kōichirō Katsumata	Yukio Ubukata
Tetsuo Kitamura	Hitoshi Gotō	Ken'ichirō Satō	Tetsundo Iwakuni	Katsuhito Yokokume	Yōichirō Aoyagi
Ken'ichirō Satō	Akira Ōide	Hiroshi Sudō	Akira Uchiyama	Makoto Yamazaki	Katsuhito Nakajima
Yukio Ubukata	Nobuhiko Sutō	Akira Ōide	Kaname Tajima	Hirohisa Fujii	Tsuyoshi Shiina
Hitoshi Yonetsu	Eiji Nagai	Keikō Hakariya	Shigeyuki Tomita	Tomohiko Mizuno	Sakihito Ozawa
Yūichi Ichikawa	Takeshi Hidaka	Ai Aoki	Noriko Furuya	Mitsuji Ishida	Manabu Matsuda
Nobuo Kawakami	Ryūshi Tsuchida	Nobuo Kawakami	Kazufumi Taniguchi	Tsuyoshi Saitō	Takashi Tanuma
Isamu Ueda	Yūichi Ichikawa	Shigeyuki Tomita	Yōichirō Esaki	Shino Aihara	Yuzuru Nishida
Shigeyuki Tomita	Nobuo Kawakami	Noriko Furuya	Jirō Ono	Keiichirō Asao	Tamotsu Shiiki
Kenzō Yoneda	Isamu Ueda	Shōzaburō Nakamura	Mikio Fujita	Shigeyuki Tomita
Kimiaki Matsuzaki	Yasukazu Hamada	Yōichirō Esaki	Kōtarō Nagasaki	Noriko Furuya
Kazuya Ishibashi died 1999, replaced by Ken'ichi Mizuno	Hiromichi Watanabe	Hirokazu Matsuno	Masaaki Akaike	Akira Amari	Shin'ichi Nakatani
Shōzaburō Nakamura	Kenzō Yoneda	Tsuneo Suzuki	Mineyuki Fukuda	Motoo Hayashi	Hiroaki Kadoyama
Sadao Ioku	Yukio Jitsukawa	Ikuzō Sakurai	Nobuhiro Ōmiya	Jun Matsumoto	Noriko Horiuchi
Akira Amari	Taei Nakamoto	Yoshitaka Sakurada	Keisuke Suzuki	Ken Saitō	Norihiko Nakayama
Hachirō Okonogi	Yoshitaka Sakurada	Hiromichi Watanabe	Taizō Sugimura	Kazunori Tanaka	Tomohiro Yamamoto
Kunio Tanabe	–	Daishirō Yamagiwa	Toshio Ukishima	Hirokazu Matsuno	Mineyuki Fukuda
Kazunori Tanaka	–	–

Election results

2026

2026 results in the Southern Kanto PR block
Party		Votes	Swing	%	Seats	+/–
	Liberal Democratic Party (LDP)	2,637,938	35.56	10.16	4^[k]	3
	Centrist Reform Alliance (CRA)^[l]	1,424,763	19.21	14.66	7	1
	Democratic Party For the People (DPFP)	788,564	10.63	2.01	3	0
	Team Mirai	682,469	9.20	New	3	New
	Sanseitō	531,288	7.16	3.44	2	1
	Japan Innovation Party (Ishin)	463,287	6.25	1.22	2	0
	Japanese Communist Party (JCP)	314,224	4.24	1.86	1	0
	Reiwa Shinsengumi (Reiwa)	202,655	2.73	3.86	1	0
	Conservative Party of Japan (CPJ)	184,802	2.49	0.17	0	0
	Tax Cuts Japan and Yukoku Alliance (Genyu)	95,646	1.29	New	0	New
	Social Democratic Party (SDP)	91,827	1.24	0.29	0	0
Total		7,417,463	100.00		23

Invalid votes		75,629	1.01
Turnout		7,493,092	55.07	1.35
Registered voters		13,605,378

2024

2024 results in the Southern Kanto PR block
Party		Votes	Swing	%	Seats	+/–
	Liberal Democratic Party (LDP)	1,822,230	25.40	9.54	7	2
	Constitutional Democratic Party of Japan (CDP)	1,700,535	23.70	1.43	6	1
	Democratic Party For the People (DPFP)	907,124	12.64	7.46	3	2
	Komeito	729,980	10.17	1.30	2	0
	Japan Innovation Party (Ishin)	536,161	7.47	4.18	2	1
	Reiwa Shinsengumi (Reiwa)	472,519	6.59	2.50	1	0
	Japanese Communist Party (JCP)	437,724	6.10	1.11	1	0
	Sanseitō	267,145	3.72	New	1	New
	Conservative Party of Japan (CPJ)	191,169	2.66	New	0	New
	Social Democratic Party (SDP)	109,959	1.53	0.15	0	0
Total		7,174,546	100.00		23	1

Invalid votes		149,772	2.04
Turnout		7,324,318	53.72	1.76
Registered voters		13,635,476

2021

2021 results in the Southern Kanto PR block
Party		Votes	Swing	%	Seats	+/–
	Liberal Democratic Party (LDP)	2,590,787	34.94	0.66	9	1
	Constitutional Democratic Party of Japan (CDP)	1,651,562	22.28	1.18	5	0
	Japan Innovation Party (Ishin)	863,897	11.65	7.73	3	2
	Komeito	850,667	11.47	0.02	2	0
	Japanese Communist Party (JCP)	534,493	7.21	0.80	1	1
	Democratic Party For the People (DPFP)	384,482	5.19	New	1	New
	Reiwa Shinsengumi (Reiwa)	302,675	4.08	New	1	New
	Social Democratic Party (SDP)	124,447	1.68	0.41	0	0
	NHK Party	111,298	1.50	New	0	New
Total		7,414,308	100.00		22

Invalid votes		161,827	2.14
Turnout		7,576,135	55.48	3.86
Registered voters		13,655,876

2017

2017 results in the Southern Kanto PR block
Party		Votes	Swing	%	Seats	+/–
	Liberal Democratic Party (LDP)	2,356,614	34.28	0.32	8	0
	Constitutional Democratic Party of Japan (CDP)	1,612,425	23.46	New	5	New
	Kibō no Tō	1,184,103	17.23	New	4	New
	Komeito	787,461	11.46	1.35	2	1
	Japanese Communist Party (JCP)	550,404	8.01	3.89	2	1
	Japan Innovation Party (Ishin)	269,274	3.92	New	1	New
	Social Democratic Party (SDP)	87,517	1.27	0.67	0	0
	Happiness Realization Party (HRP)	26,331	0.38	0.03	0	0
Total		6,874,129	100.00		22

Invalid votes		114,815	1.64
Turnout		6,988,944	51.62	1.52
Registered voters		13,539,564

2014

2014 results in the Southern Kanto PR block
Party		Votes	Swing	%	Seats	+/–
	Liberal Democratic Party (LDP)	2,321,609	33.96	7.53	8	2
	Democratic Party of Japan (DPJ)	1,203,572	17.61	0.29	4	0
	Japan Innovation Party (JIP)	1,053,221	15.41	3.48	4	1
	Komeito	875,712	12.81	2.20	3	1
	Japanese Communist Party (JCP)	813,634	11.90	6.04	3	2
	Party for Future Generations	236,596	3.46	New	0	New
	People's Life Party (PLP)	175,431	2.57	New	0	New
	Social Democratic Party (SDP)	132,542	1.94	0.01	0	0
	Happiness Realization Party (HRP)	24,052	0.35	0.08	0	0
Total		6,836,369	100.00		22

Invalid votes		152,136	2.18
Turnout		6,988,505	53.13	6.40
Registered voters		13,152,606

2012

2012 results in the Southern Kanto PR block
Party		Votes	Swing	%	Seats	+/–
	Liberal Democratic Party (LDP)	2,020,043	26.43	0.45	6	0
	Japan Restoration Party (JRP)	1,443,270	18.89	New	5	New
	Democratic Party of Japan (DPJ)	1,323,048	17.31	25.68	4	7
	Your Party	951,294	12.45	5.40	3	2
	Komeito	810,936	10.61	0.58	2	0
	Tomorrow Party of Japan (TPJ)	477,309	6.25	New	1	New
	Japanese Communist Party (JCP)	447,890	5.86	1.14	1	0
	Social Democratic Party (SDP)	147,191	1.93	2.38	0	1
	Happiness Realization Party (HRP)	20,987	0.27	0.24	0	0
Total		7,641,968	100.00		22

Invalid votes		153,917	1.97
Turnout		7,795,885	59.53	7.73
Registered voters		13,095,467

2009

2009 results in the Southern Kanto PR block
Party		Votes	Swing	%	Seats	+/–
	Democratic Party of Japan (DPJ)	3,695,159	42.99	13.53	11	4
	Liberal Democratic Party (LDP)	2,233,560	25.99	16.41	6	4
	Komeito	862,427	10.03	2.13	2	1
	Your Party	605,358	7.04	New	1	New
	Japanese Communist Party (JCP)	601,299	7.00	0.15	1	0
	Social Democratic Party (SDP)	369,754	4.30	1.07	1	0
	People's New Party (PNP)	102,992	1.20	New	0	New
	New Party Nippon (Nippon)	79,792	0.93	2.81	0	0
	Happiness Realization Party (HRP)	44,162	0.51	New	0	New
Total		8,594,503	100.00		22

Invalid votes		154,200	1.76
Turnout		8,748,703	67.26	0.97
Registered voters		13,007,629

2005

2005 results in the Southern Kanto PR block
Party		Votes	Swing	%	Seats	+/–
	Liberal Democratic Party (LDP)	3,510,617	42.40	7.78	10	2
	Democratic Party of Japan (DPJ)	2,439,549	29.47	10.51	7	2
	Komeito	1,007,504	12.17	1.58	3	0
	Japanese Communist Party (JCP)	566,945	6.85	0.54	1	0
	Social Democratic Party (SDP)	444,753	5.37	1.11	1	0
	New Party Nippon (Nippon)	309,851	3.74	New	0	New
Total		8,279,219	100.00		22

Invalid votes		141,716	1.68
Turnout		8,420,935	66.29	8.69
Registered voters		12,702,953

2003

2003 results in the Southern Kanto PR block
Party		Votes	Swing	%	Seats	+/–
	Democratic Party of Japan (DPJ)	2,819,165	39.98	12.29	9	3
	Liberal Democratic Party (LDP)	2,441,590	34.62	9.88	8	2
	Komeito	969,464	13.75	1.32	3	0
	Japanese Communist Party (JCP)	521,309	7.39	4.14	1	1
	Social Democratic Party (SDP)	300,599	4.26	5.30	1	1
Total		7,052,127	100.00		22	1

Invalid votes		173,597	2.40
Turnout		7,225,724	57.60	1.87
Registered voters		12,545,306

2000

2000 results in the Southern Kanto PR block
Party		Votes	Swing	%	Seats	+/–
	Democratic Party of Japan (DPJ)	1,940,792	27.68	6.48	6	1
	Liberal Democratic Party (LDP)	1,734,297	24.74	4.25	6	1
	Komeito	871,150	12.43	New	3	New
	Liberal Party (LP)	839,845	11.98	New	2	New
	Japanese Communist Party (JCP)	808,453	11.53	2.51	2	1
	Social Democratic Party (SDP)	670,141	9.56	3.13	2	1
	Liberal League (LL)	145,858	2.08	0.94	0	0
Total		7,010,536	100.00		21	2

Invalid votes		226,843	3.13
Turnout		7,237,379	59.47
Registered voters		12,170,170

1996

1996 results in the Southern Kanto PR block
Party		Votes	%	Seats
	Liberal Democratic Party (LDP)	1,820,846	28.99	7
	New Frontier Party (NFP)	1,667,552	26.55	7
	Democratic Party (DP)	1,331,850	21.21	5
	Japanese Communist Party (JCP)	881,751	14.04	3
	Social Democratic Party (SDP)	403,875	6.43	1
	New Socialist Party (NSP)	102,906	1.64	0
	Liberal League (LL)	71,756	1.14	0
Total		6,280,536	100.00	23

References

The Senkyo: Results of general and by-elections for the House of Representatives since 1890
Yomiuri Shimbun: Southern Kantō results 2005, 2009, 2012

Notes

↑ 1996 DP
↑ 2012 JRP, 2014 JIP
↑ NSP 1.64, LL 1.14
↑ LL 2.08
↑ HRP 0.51
↑ HRP 0.27
↑ Generations 3.46, HRP 0.35
↑ HRP 0.38
↑ NHK 1.50
↑ Genyu 1.29
↑ Six of ten seats forfeited due to lack of candidates
↑ Swings compared to CDP and Komeito

[1] 1996 DP

[2] 2012 JRP, 2014 JIP

[3] NSP 1.64, LL 1.14

[4] LL 2.08

[5] HRP 0.51

[6] HRP 0.27

[7] Generations 3.46, HRP 0.35

[8] HRP 0.38

[9] NHK 1.50

[10] Genyu 1.29

[11] Six of ten seats forfeited due to lack of candidates

[CRA-12] Swings compared to CDP and Komeito

[a]

[b]

[c]

[d]

[e]

[f]

[g]

[h]

[i]

[j]

[k]

[l]

v t e 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: Eisuke Mori, Chiba 11th Vice Speaker of the House of Representatives of Japan: Keiichi Ishii, Northern Kanto 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 12 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