Tokyo 16th district

Tokyo 16th District (東京都第16区, Tokyo-to dai-juroku-ku) is an electoral district of the Japanese House of Representatives. The district was created in 1994 as a part of the move towards single-member districts. In 2024 the district was won by the Liberal Democratic member Yōhei Ōnishi, son of Hideo Ōnishi. who was Representative 2012 – 2024.

Tokyo 16th District
東京都第16区
Parliamentary constituency for the Japanese House of Representatives
Prefecture	Tokyo
Proportional Block	Tokyo
Electorate	391,972 (as of September 2022)[1]
Current constituency
Created	1994
Seats	One
Party	LDP
Representative	Yōhei Ōnishi

Areas covered

Current district

As of 16 January 2023, the areas covered by this district are as follows:^[2][3]

• Edogawa
  • Chuo 1-3, Matsue 1-7, Osugi 1-5, Nishi-Ichinoe 1-4, Haruecho 4, Ichinoe 1-8, Nishimizue 4, Edogawa 4, Matsumoto 1-2
  • Kasai, Tobu and Shishibone

As part of the 2022 redistricting, the former town of Komatsugawa was transferred to the 14th district.

Areas 2017–2022

From the second redistricting in 2017 until the third redistricting in 2022, the areas covered by this district were as follows:^[4][5]

• Edogawa (Koiwa, excluding Kamiishiki 1-3, Honisshiki 1-3, and Okinomiya)
  • Chuo 1-4, Matsushima 1-4, Matsue 1-7, Higashikomatsugawa 1-4, Nishikomatsugawa, Osugi 1-5, Nishi Ichinoe 1-4, Haruecho 4, Ichinoe 1-8, Nishimizue 4, Edogawa 4, Matsumoto 1-2
  • Within the Komatsugawa, Kasai, Tobu and Shishibone areas

As part of the 2017 redistricting, the former towns of Kamiishiki, Motoishiki and Okinomiya were all moved to the 17th district.^[4]

Areas 2013–2017

From the first redistricting in 2013 until the second redistricting in 2017, the areas covered by this district were as follows:^[6]

• Edogawa
  • Central Office (excluding Kami-Ishiki 3)
    • Chuo 1-4, Matsushima 1-4, Matsue 1-7, Higashikomatsugawa 1-4, Nishikomatsugawa, Osugi 1-5, Nishi Ichinoe 1-4, Haruecho 4, Ichinoe (1, 8), Nishimizue 4, Edogawa 4, Matsumoto 1-2, Kamiisshiki 1-2, Honisshiki 1-3, Okinomiyacho
  • Komatsugawa, Kasai, Tobu and Shishibone areas

As part of the 2013 redistricting, the area of Kamiishiki 3 was transferred to the 17th district.^[6]

Areas from before 2013

From the creation of the district in 1994 until the first redistricting in 2013, the areas covered by this district were as follows:^[7]

• Edogawa
  • Central Office
  • Komatsugawa, Kasai, Tobu and Shishibone areas

Elected representatives

Representative	Party		Years served	Notes
Yoshinobu Shimamura		LDP	1996 – 2000	Failed to get re-elected in the 2000 general election,[8] won back the seat in the 2003 general election.[9]
Yoshio Udagawa		Independent	2000 – 2003	Failed to get re-elected in the 2003 general election.[9]
Yoshinobu Shimamura		LDP	2003 – 2009	Not re-elected in the 2009 general election[10]
Akihiro Hatsushika		DPJ	2009 – 2012	Not re-elected in the 2012 general election.[11] Elected to the Tokyo PR district in the 2014 and 2017 general elections.[12][13]
Hideo Ōnishi		LDP	2012 – 2024
Yōhei Ōnishi		LDP	2024 –

Election results

‡ - Also ran in the Tokyo PR district

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

2024^[14]

Party		Candidate	Votes	%	±%
	LDP	Yōhei Ōnishi‡	71,728	37.3	1.4
	CDP	Katsuyuki Shibata‡‡	60,714	31.6	1.8
	Ishin	Hirosato Nakatsugawa [jp]‡	28,538	14.9	2.2
	Sanseitō	Masatoshi Arita	16,636	8.7
	JCP	Sakae Miyamoto	14,464	7.5	4.2
Registered electors			390,804
Turnout				51.38	0.20
	LDP hold

2021^[15]

Party		Candidate	Votes	%	±%
	LDP	Hideo Ōnishi (incumbent) (endorsed by Komeito)	88,758	38.7	2.2
	CDP	Motoko Mizuno‡	68,397	29.8	4.8
	Ishin	Hirosato Nakatsugawa‡	39,290	17.1	New
	JCP	Ota Ayaka	26,819	11.7	New
	Anti-NHK	Ken Tanaka‡	6,264	2.7	New
Registered electors			465,115
Majority			20,361	8.9	2.6
Turnout			239,906	51.6	4.1
	LDP hold		Swing	3.8

2017^[13]

Party		Candidate	Votes	%	±%
	LDP	Hideo Onishi‡ (incumbent) (endorsed by Komeito)	84,457	40.9	5.3
	CDP	Akihiro Hatsushika‡‡	71,405	34.6	New
	Kibō no Tō	Kenji Tamura‡	50,568	24.5	New
Registered electors			462,216
Majority			13,052	6.3	13.4
Turnout			219,506	47.5	1.6
	LDP hold		Swing	6.8

2014^[12]

Party		Candidate	Votes	%	±%
	LDP	Hideo Onishi‡ (incumbent) (endorsed by Komeito)	98,536	46.3	8.3
	Ishin	Akihiro Hatsushika‡‡ (endorsed by the DPJ)	56,701	26.6	New
	JCP	Asako Ota‡	36,976	17.4	11.3
	Japanese Kokoro	Yoshiaki Ishii‡	11,484	5.4	New
	Independent	Takashi Okamoto	9,334	4.4	New
Registered electors			455,218
Majority			41,835	19.7	0.3
Turnout			223,330	49.1	8.4
	LDP hold		Swing	6.1

2012^[11]

Party		Candidate	Votes	%	±%
	LDP	Hideo Onishi‡ (incumbent)	95,222	38.0	3.9
	Restoration	Hirosato Nakatsugawa‡ (incumbent - Tokyo PR)	46,537	18.6	New
	Your	Reiko Ueda‡	43,719	17.3	New
	Tomorrow	Akihiro Hatsushika‡ (incumbent) (endorsed by the NDP)	27,525	11.0	New
	Democratic	Katsuyoshi Konno‡ (endorsed by the PNP)	22,741	9.1	38.3
	JCP	Kayoko Shimacho	15,145	6.1	2.5
Registered electors			452,248
Majority			48,685	19.4	New
Turnout			260,133	57.5	4.4
	LDP gain from Democratic		Swing	9.5

2009^[10]

Party		Candidate	Votes	%	±%
	Democratic	Akihiro Hatsushika‡	128,400	47.4	14.3
	LDP	Yoshinobu Shimamura (incumbent)	113,634	41.9	15.1
	JCP	Kyoichi Kawai	23,385	8.6	1.3
	Happiness Realization	Ichiro Kojima	5,763	2.1	New
Registered electors			450,445
Majority			14,766	5.5	New
Turnout			279,006	61.9	1.5
	Democratic gain from LDP		Swing	8.2

2005^[16]

Party		Candidate	Votes	%	±%
	LDP	Yoshinobu Shimamura‡	145,439	57.0	21.7
	Democratic	Hirosato Nakatsugawa‡ (incumbent - Tokyo PR)	84,564	33.1	2.1
	JCP	Yasunori Abe	25,328	9.9	2.0
Registered electors			439,858
Majority			60,875	23.9	19.4
Turnout			265,498	60.4	6.1
	LDP hold		Swing	13.3

2003^[9]

Party		Candidate	Votes	%	±%
	LDP	Yoshinobu Shimamura‡	80,015	35.3	4.9
	Democratic	Hirosato Nakatsugawa‡‡ (incumbent - Tokyo PR)	70,189	31.0	6.3
	Independent Society	Yoshi Udagawa	58,250	25.7	New
	JCP	Yasunori Abe‡	17,985	7.9	5.7
Registered electors			432,954
Majority			9,826	4.3	New
Turnout			234,964	54.3	2.1
	LDP gain from Independent		Swing	6.7

2000^[8]

Party		Candidate	Votes	%	±%
	Independent	Yoshio Udagawa	72,825	32.1	New
	LDP	Yoshinobu Shimamura‡ (incumbent)	69,543	30.6	8.4
	Democratic	Hirosato Nakatsugawa‡‡	53,897	23.7	New
	JCP	Yasunori Abe	30,772	13.6	0.4
Registered electors			417,198
Majority			3,282	1.5	New
Turnout			235,133	56.4	4.8
	Independent gain from LDP		Swing	N/A

1996^[17]

Party		Candidate	Votes	%	±%
	LDP	Yoshinobu Shimamura‡ (incumbent - former Tokyo 10th District)	77,753	39.0	New
	New Frontier	Naoko Sato	64,942	32.6	New
	Democratic	Kazuo Inoue‡	28,805	14.4	New
	JCP	Yasunori Abe	27,923	14.0	New
Registered electors			396,286
Majority			12,811	6.4	New
Turnout			204,444	51.6	New
	LDP win (new seat)