Tokyo 15th district

Tokyo 15th District(東京都第15区, Tokyo-to jugo-ku) is an electoral district of the Japanese House of Representatives. The district was established in 1994 as part of the change to single-member districts.

Areas covered

Current district

As of 13 January 2023, the areas covered by this district are as follows:

Kōtō, since the creation of the district

Elected representatives

Representative	Party	Years served	Notes
Koji Kakizawa		LDP	1996–1999	Redistricted from the former 15th district. Resigned his seat to run in the 1999 Tokyo gubernatorial election.
Ben Kimura		LDP	1999–2000	Lost re-election.
Koji Kakizawa		Ind.	2000–2003	Retired from politics.
Ben Kimura		LDP	2003–2009	Lost re-election.
Shozo Azuma		DPJ	2009–2012
	PLF	2012
	TPJ	2012	Lost re-election.
Mito Kakizawa		Your	2012–2013
	Ind.	2013
	Unity	2013–2014
	JIP	2014–2016	Re-elected in 2014.
	DP	2016–2017
	Kibō	2017	Re-elected in the Tokyo PR block.
Tsukasa Akimoto		LDP	2017–2021	Resigned mid-term.
Mito Kakizawa		Ind.	2021–2024	Resigned mid-term.
Natsumi Sakai		CDP	2024–2026	Lost re-election.
Kōki Ōzora		LDP	2026–

Election results

‡ - Also ran in the Tokyo PR district election

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

2026
Party	Candidate	Votes	%	±%
	LDP	Kōki Ōzora	109,489	42.5	16.6
	Centrist Reform	Natsumi Sakai	70,991	27.5
	DPP	Saaya Fukami	28,674	11.1	New
	Ishin	Yurika Mitsugi	26,546	10.3	New
	Sanseitō	Kana Suzuki	14,770	5.7	New
	Genzei–Yukoku	Toshiaki Yoshino	7,296	2.8	New
Turnout	257,766	60.88	3.30
Registered electors	432,742
	LDP gain from Centrist Reform	Swing	8.3

2024
Party	Candidate	Votes	%	±%
	CDP	Natsumi Sakai	66,791	27.5	1.5
	Independent	Genki Sudo	65,666	27.1	9.7
	LDP	Kōki Ōzora‡‡	62,771	25.9
	Independent	Yui Kanazawa	32,442	13.4
	JCP	Azuma Kozutsumi	15,049	6.2
Turnout		57.58	16.88
	CDP hold

The 2024 by-election in the constituency was called following the arrest and a court ruling of the former LDP state minister Mito Kakizawa, who was arrested and found guilty on vote buying charges.

The voter turnout was 40.70%, 18.03% lower than the previous election's 58.73%, marking the constituency's lowest.

2024 by-election
Party	Candidate	Votes	%	±%
	CDP	Natsumi Sakai (Supported by the JCP, SDP)	49,476	29.0	4.2
	Independent	Genki Sudo (Endorsed by Reiwa Shinsengumi)	29,669	17.4	New
	Ishin	Yui Kanazawa (Endorsed by FEFA)	28,461	16.7	2.1
	CPJ	Akari Iiyama	24,264	14.2	New
	Independent	Hirotada Ototake (Endorsed by FnK, DPP)	19,655	11.5	New
	Sanseitō	Rina Yoshikawa	8,639	5.1	New
	Independent	Tsukasa Akimoto	8,061	4.7	New
	Anti-NHK	Katsuya Fukunaga	1,410	0.8	New
	Tsubasa	Ryosuke Nemoto	1,110	0.7	New
Registered electors	430,285
Turnout	175,126	40.7	18.0
	CDP gain from Independent

2021
Party	Candidate	Votes	%	±%
	Independent	Mito Kakizawa (incumbent - Tokyo PR) (endorsed by the LDP)	76,251	32.0	*New*
	CDP	Masae Ido‡ (endorsed by the SDP)	58,978	24.8	New
	Ishin	Yui Kanazawa‡	44,882	18.8	New
	Independent	Hiroshi Imamura (endorsed by the LDP)	26,628	11.2	New
	Independent	Takashi Ino	17,514	7.4	0.3
	Japan First	Makoto Sakurai	9,449	4.0	New
	Independent	Koji Yoshida	4,608	1.9	New
Registered electors	424,125
Turnout	249,089	58.7	3.1
	Independent gain from LDP

2017
Party	Candidate	Votes	%	±%
	LDP	Tsukasa Akimoto‡ (incumbent - Tokyo PR) (endorsed by Komeito)	101,155	45.6	5.6
	Kibō no Tō	Mito Kakizawa‡‡ (incumbent)	70,325	31.7	New
	JCP	Toshio Yoshida	34,943	15.7	1.1
	Independent	Takashi Ino	15,667	7.4	2.9
Registered electors	412,336
Turnout	229,218	55.6	0.4
	LDP gain from Ishin	Swing	7.3

2014
Party	Candidate	Votes	%	±%
	Ishin	Mito Kakizawa‡ (incumbent) (endorsed by the JRP)	88.507	41.3	*New*
	LDP	Tsukasa Akimoto‡‡ (incumbent - Tokyo PR) (endorsed by Komeito)	85,714	40.0	9.0
	JCP	Toshio Yoshida	31,384	14.6	6.8
	Independent	Takashi Ino	8,759	4.1	New
Registered electors	395,474
Turnout	221,584	56.0	8.1
	Ishin gain from Your	Swing

2012
Party	Candidate	Votes	%	±%
	Your	Mito Kakizawa‡ (incumbent - Tokyo PR) (endorsed by the JRP)	88,222	36.9	21.2
	LDP	Tsukasa Akimoto‡‡ (endorsed by Komeito)	74,159	31.0	1.3
	Democratic	Mieko Tanaka‡	29,355	12.3	30.1
	JCP	Toshio Yoshida	18,667	7.8	1.1
	Tomorrow	Shozo Azuma‡ (incumbent) (endorsed by the NDP)	15,667	7.4	New
Registered electors	386,411
Turnout	247,496	64.1	3.2
	Your gain from Democratic	Swing	10.6

2009
Party	Candidate	Votes	%	±%
	Democratic	Shozo Azuma‡	105,131	42.4	7.2
	LDP	Ben Kimura‡ (incumbent) (endorsed by Komeito)	80,054	32.3	22.2
	Your	Mito Kakizawa‡‡	38.808	15.7	New
	JCP	Toshio Yoshida	22,176	8.9	1.6
Registered electors	375,924
Turnout	229,218	67.3	0.8
	Democratic gain from LDP	Swing	6.7

2005
Party	Candidate	Votes	%	±%
	LDP	Ben Kimura‡ (incumbent - Tokyo PR) (endorsed by Komeito)	123,021	54.4	5.6
	Democratic	Shozo Azuma‡ (incumbent)	79,621	35.2	5.2
	JCP	Toshio Yoshida	23,659	10.5	0.5
Registered electors	348,023
Turnout	231,331	66.5	6.1
	LDP hold	Swing	6.5

2003
Party	Candidate	Votes	%	±%
	LDP	Ben Kimura‡	69,164	35.4	7.3
	Democratic	Shozo Azuma‡ (incumbent - Tokyo PR)	58,616	30.0	15.3
	Independent Society	Koji Kakizawa	47,843	24.5	New
	JCP	Haruta Atsuyuki	19,610	10.0	5.6
Registered electors	332,572
Turnout	200,707	60.4	2.1
	LDP gain from Independent	Swing	15.1

2000
Party	Candidate	Votes	%	±%
	Independent	Koji Kakizawa	54,298	28.8	5.6
	LDP	Ben Kimura‡ (incumbent)	52,892	28.1	22.9
	JCP	Haruta Atsuyuki	29,412	15.6	2.9
	Democratic	Tatsuharu Mawatari‡	27,654	14.7	15.8
	Liberal	Shozo Azuma‡‡	22,800	12.1	New
	Independent	Kaoru Kondo	1,302	0.7	New
Registered electors	309,356
Turnout	193,348	62.5
	Independent gain from LDP	Swing	N/A

1999 by-election
Party	Candidate	Votes	%	±%
	LDP	Ben Kimura	89,605	51.0	14.6
	Democratic	Kazuko Yoshida	53,490	30.5	New
	JCP	Muneharu Fusa	32,541	18.5	0.8
Registered electors
Turnout
	LDP hold	Swing	7.3

1996
Party	Candidate	Votes	%	±%
	LDP	Koji Kakizawa‡ (incumbent - former Tokyo 6th)	61,701	36.4	*New*
	New Frontier	Akira Kuroyanagi	46,969	27.7	New
	JCP	Muneharu Fusa	29,901	17.7	New
	Democratic	Noboru Osawa	28,181	16.6	New
	Independent	Yoshihisa Kitaura	2,629	1.6	New
Registered electors	293,912
Turnout	173,731	59.1	New
	LDP win (new seat)