Saitama 4th district

Saitama 4th district (埼玉県第4区, Saitama-ken dai-yonku or simply 埼玉4区, Saitama-ken yonku) is a single-member constituency of the House of Representatives in the national Diet of Japan located in Saitama Prefecture.

Saitama 4th district
Parliamentary constituency for the Japanese House of Representatives
Numbered map of Saitama Prefecture single-member districts
Prefecture	Saitama
Proportional District	Northern Kanto
Electorate	389,389[1]
Current constituency
Created	1994
Seats	One
Party	Liberal Democratic
Representative	Yasushi Hosaka
Municipalities	Asaka, Niiza, Shiki, and Wakō.

Areas covered

since 2002

• Asaka
• Niiza
• Shiki
• Wakō

^[2][3]

1994-2002

• Asaka
• Niiza
• Shiki
• Wakō
• Toda

^[4]

List of representatives

Election	Representative	Party		Notes
1996[5]	Kiyoshi Ueda		New Frontier
			From Five
			Good Governance
2000[6]			Democratic
2003[7]	Hideo Jinpu		Democratic
2005[8]	Chuko Hayakawa		Liberal Democratic
2009[9]	Hideo Jinpu		Democratic
2012[10]	Mayuko Toyota		Liberal Democratic
2014[11]
			Independent
2017[12]	Yasushi Hosaka		Liberal Democratic
2021[13]
2024[14]

Election results

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

2024

2024^[14]

Party		Candidate	Votes	%	±%
	LDP	Yasushi Hosaka (incumbent)	82,125	41,8	10.5
	DPP	Mitsuhiro Kishida (won PR seat)	52,728	26.8	3.4
	Ishin	Yasuyuki Watanabe	34,048	17.3
	JCP	Kaoru Kudō	27,763	14.1	2.9
Registered electors			389,142
Turnout				52,05	2.44
	LDP hold

2021

2021^[13]

Party		Candidate	Votes	%	±%
	Liberal Democratic (endorsed by Komeito)	Yasushi Hosaka (incumbent)	107,135	52.26
	DPP	Katsuhiko Asano	47,863	23.35	New
	Communist	Kaoru Kudo	34,897	17.02
	Independent	Nobuhiko Endō	11,733	5.72	New
	Independent	Hiroki Ogasawara	3,358	1.64	N/A
Majority			59,272	28.91
Registered electors			386,796
Turnout				54.49	0.43
	LDP hold

2017

2017^[12]

Party		Candidate	Votes	%	±%
	Liberal Democratic (endorsed by Komeito)	Yasushi Hosaka	74,287	37.41
	Kibō no Tō	Yoshinori Yoshida	50,165	25.27	New
	Communist	Hideyoshi Asaka	29,125	14.67
	Innovation	Hitoshi Aoyagi [ja]	23,362	11.77	New
	Independent	Mayuko Toyota (incumbent)	21,614	10.89	New
Majority			24,122	12.14
Registered electors			376,437
Turnout				54.06	0.72
	LDP gain from Independent

2014

2014^[11]

Party		Candidate	Votes	%	±%
	Liberal Democratic (endorsed by Komeito)	Mayuko Toyota (incumbent)	88,730	48.11
	Democratic	Hideo Jinpu	62,062	33.65
	Communist	Haruko Sakurai	33,646	18.24
Majority			26,668	14.46
Registered electors			360,274
Turnout				53.34	4.69
	LDP hold

2012

2012^[10]

Party		Candidate	Votes	%	±%
	Liberal Democratic (endorsed by Komeito)	Mayuko Toyota	71,061	35.94
	Democratic (endorsed by PNP)	Hideo Jinpu (incumbent)	53,366	26.99
	Restoration	Hitoshi Aoyagi [ja]	46,303	23.42	New
	Communist	Haruko Sakurai	23,360	11.82
	Independent	Hiroki Ogasawara	3,617	1.83	New
Majority			17,695	8.95
Registered electors			355,100
Turnout				58.03	7.86
	LDP gain from Democratic

2009

2009^[9]

Party		Candidate	Votes	%	±%
	Democratic	Hideo Jinpu (PR seat incumbent)	121,137	54.25
	Liberal Democratic	Chuko Hayakawa (incumbent)	74,889	33.54
	Communist	Haruko Sakurai	23,966	10.73
	Happiness Realization	Takemitsu Mizuno	3,311	1.48	New
Majority			46,248	20.71
Registered electors			346,769
Turnout				65.89	0.94
	Democratic gain from LDP

2005

2005^[8]

Party		Candidate	Votes	%	±%
	Liberal Democratic	Chuko Hayakawa (PR seat incumbent)	103,366	48.78
	Democratic	Hideo Jinpu (incumbent) (won PR seat)	86,229	40.69
	Communist	Haruko Sakurai	22,322	10.53
Majority			17,137	8.09
Registered electors			333,735
Turnout				64.95	11.35
	LDP gain from Democratic

2003

2003^[7]

Party		Candidate	Votes	%	±%
	Democratic	Hideo Jinpu	81,367	48.00
	Liberal Democratic	Chuko Hayakawa (won PR seat)	69,625	41.07
	Communist	Sumiko Ayabe	18,527	10.93
Majority			11,742	6.93
Turnout				53.60	2.49
	Democratic hold

2000

2000^[6]

Party		Candidate	Votes	%	±%
	Democratic	Kiyoshi Ueda (incumbent)	106,131	49.30	New
	Liberal Democratic	Chuko Hayakawa	70,062	32.55
	Communist	Sumiko Ayabe	39,069	18.15
Majority			36,069	16.75
Turnout				56.09	5.36
	Democratic hold

1996

1996^[5]

Party		Candidate	Votes	%	±%
	New Frontier	Kiyoshi Ueda	72,420	39.25	New
	Liberal Democratic	Chuko Hayakawa	46,869	25.40	New
	Communist	Sumiko Ayabe	33,670	18.25	New
	Democratic	Satoshi Ishizuka	28,401	15.39	New
	Liberal League	Ryusuke Hayakawa	3,140	1.70	New
Majority			25,551	13.85
Turnout				50.73
	New Frontier win (new seat)