Tokyo 18th district

is a constituency of the House of Representatives in the Diet of Japan. It is located in Western Tokyo and consists of the cities of Musashino, Koganei and, since 2022 Nishitokyo. Musashino and Koganei have been a part of the district from its creation, but between 2002 and 2022 it also included Fuchū, and before 2002 it included Mitaka. Before the electoral reform of 1994, the area had been part of Tokyo 7th district, where four representatives were elected by Single non-transferable vote (SNTV).

From its creation to 2012, the district was represented by former Prime Minister and popular Democratic Party co-founder Naoto Kan. In the election of 2005 it was the only constituency the opposition could defend in Tokyo against the landslide for Junichiro Koizumi's ruling coalition. In 2003, then party chairman Kan beat former Minister of Labour Kunio Hatoyama, the younger brother of Democratic Party leader Yukio Hatoyama by a margin of more than 50,000 votes.

In the election of 2009, Masatada Tsuchiya was the candidate for the ruling LDP. Tsuchiya who failed to unseat Kan in 2005 was a representative for the Tokyo proportional representation block where he ranked second on the LDP's list 2005. In 2009 he failed to secure reelection in the Tokyo block. Kan was elected president of the then ruling Democratic Party again in 2010 shortly before the 2010 House of Councillors election; but his cabinet resigned after only 15 months. In the 2012 House of Representatives election, Kan lost Tokyo 18th district to Masatada Tsuchiya by more than 10,000 votes; ranking third on the Democratic proportional list in Tokyo (sekihairitsu 87.9%), he gained the last of the three Democratic seats in the Tokyo proportional block behind Banri Kaieda and Jin Matsubara.

Kan joined the Constitutional Democratic Party of Japan before the 2017 general election and regained the seat. Tsuchiya lost his seat even with his high sekihairitsu as he did not run for the proportional block. In 2021 Kan was challenged by a former DPJ lawmaker, Akihisa Nagashima, who had joined the LDP. Kan managed to hold his seat in a tight race that received national attention.

List of representatives

Representative	Party		Dates	Notes
Naoto Kan	bgcolor=Template:Party color |	DPJ	1996–2012	Re-elected in the Tokyo PR block
Masatada Tsuchiya	bgcolor=Template:Party color |	LDP	2012–2017
Naoto Kan	bgcolor=Template:Party color |	CDP	2017–2024
Kaoru Fukuda	bgcolor=Template:Party color |	LDP	2024-	Incumbent

Election results

2024

Party		Candidate	Votes	%	±%
		Kaoru Fukuda	Template:Replace	42.34
		Reiko Matsushita (elected by PR)	96,820	41.41
		Yukiko Tokunaga	19,496	8.34
		Makoto Higuchi	18,512	7.92
Majority			2,182	0.93
Turnout			233,830	60.13
	gain from

2021

Party		Candidate	Votes	%	±%
		Naoto Kan	Template:Replace	47.12
		Akihisa Nagashima (elected by PR)	115,881	44.72
		Masami Koyasu	21,151	8.16
Majority			6,210	2.40
Turnout				59.86
	hold		Swing	0.98

2017

Party		Candidate	Votes	%	±%
		Naoto Kan	96,713	40.73
		Masatada Tsuchiya	95,667	40.29
		Atsushi Tokita	45,081	18.98
Majority			1,046	0.44
Turnout				55.83
	gain from		Swing	Increase3.72

2014

Party		Candidate	Votes	%	±%
		Masatada Tsuchiya	106,143	45.81
		Naoto Kan (elected by PR)	89,877	38.79
		Ryo Yuuki	35,699	15.41
Majority			16,266	7.02
Turnout				57.43
	hold		Swing	Increase1.57

2012

Party		Candidate	Votes	%	±%
		Masatada Tsuchiya	84,078	32.22
		Naoto Kan (elected by PR)	73,942	28.33
		Katsuhito Yokokume	44,828	17.18
		Katsuya Igarashi	28,837	11.05
		Yasuyuki Sugimura	15,873	6.08
		Takayoshi Yanagi	13,419	5.14
Majority			10,136	3.89
Turnout				65.02
	gain from		Swing	Increase15.61

2009

Party		Candidate	Votes	%	±%
		Naoto Kan	163,446	59.46
		Masatada Tsuchiya	88,325	32.13
		Tamiji Koizumi	21,004	7.64
		Michie Tanabe	2,087	0.76
Majority			75,121	27.33
Turnout			274,862	68.24
	hold		Swing	Increase12.22

File:Tokyo hrdist map 2005.PNG

In 2005, the ruling coalition of LDP (red) and Kōmeitō (green) swept Tokyo's single-member districts. The opposition DPJ (blue) was reduced to one district, down from 12 in 2003.

2005

Party		Candidate	Votes	%	±%
		Naoto Kan	126,716	46.77
		Masatada Tsuchiya (elected by PR)	118,879	43.88
		Tōru Miyamoto	21,542	7.95
Turnout			270,949	68.04

2003

Party		Candidate	Votes	%	±%
		Naoto Kan	139,195	57.36
		Kunio Hatoyama (elected by PR)	83,337	34.34
		Motonari Kobayama	16,010	6.60
Turnout			242,652	62.38

2000

Party		Candidate	Votes	%	±%
		Naoto Kan	114,750
		Hisanori Kataoka	49,740
		Sadahiko Toda	21,900
		Takashi Kanamori	16,467
		Yū Kaneko	1,521

1996

Party		Candidate	Votes	%	±%
		Naoto Kan	116,910
		Takashi Kanamori	24,245
		Chikara Ōkubo	23,566
		Sadahiko Toda	22,488

References

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