Hokkaido 10th district

Hokkaidō 10th district (北海道[第]10区) is a single-member electoral district for the House of Representatives, the lower house of the National Diet of Japan.

Hokkaido 10th District
Parliamentary constituency for the Japanese House of Representatives
Numbered map of Hokkaido Prefecture single-member districts
Prefecture	Hokkaido
Proportional District	Hokkaido
Electorate	284,648 (2021)[1]
Current constituency
Seats	One
Party	Komeito[2]
Representative	Hisashi Inatsu
Created from	Portions of the former 2nd and 4th districts
Subprefecture	Sorachi and Rumoi (plus portions of Kamikawa and Sōya)

The district is located in the prefecture (-dō) of Hokkaidō and represents the municipalities within Hokkaido's Sorachi and Rumoi subprefectures, as well as the towns of Horokanai (formerly within Sorachi, now a part of Kamikawa Subprefecture) and Horonobe (formerly within Rumoi, now a part of Sōya Subprefecture).

History

The district was created in 1994 when the current system of single-member districts was introduced and first contested in the 1996 general election. It was formed from portions of the former 2nd and 4th districts that had existed under the multi-member system since 1947. In 1996 the seat was won by Democratic Party of Japan member Tadamasa Kodaira, who had been one of the representatives of the former 4th district since 1990. Kodaira retained the seat at the following four elections, until his loss to Komeito candidate Hisashi Inatsu at the 2012 general election. Inatsu has retained the seat in subsequent elections.

List of representatives

Representative	Party		Dates	Notes
Tadamasa Kodaira		DPJ	1996 – 2012	Also lost in the PR block
Hisashi Inatsu		KM	2012 –

Recent results

2024

Party		Candidate	Votes	%	±%
	Komeito	Hisashi Inatsu (incumbent) (endorsed by the Liberal Democratic Party and New Party Daichi)
	CDP	Hiroshi Kamiya
Turnout

2021^[3]

Party		Candidate	Votes	%	±%
	Komeito	Hisashi Inatsu (incumbent) (endorsed by the Liberal Democratic Party and New Party Daichi)	96,843	53.93	3.8
	CDP	Hiroshi Kamiya (elected via PR)	82,718	46.07	3.8
Majority				7.8	7.6
Turnout				64.80	1.36
	Komeito hold		Swing	3.8

2017^[4]

Party		Candidate	Votes	%	±%
	Komeito	Hisashi Inatsu (incumbent) (endorsed by the Liberal Democratic Party and New Party Daichi)	96,795	50.1	1.6
	CDP	Hiroshi Kamiya (elected via PR)	96,282	49.9	10.1
Majority			513	0.2	8.5
Turnout				65.16	6.31
	Komeito hold		Swing	4.3

2014^[5]

Party		Candidate	Votes	%	±%
	Komeito	Hisashi Inatsu (incumbent) (endorsed by the Liberal Democratic Party)	86,722	48.5
	Democratic	Hiroshi Kamiya	71,219	39.8
	JCP	Kenji Kimura	20,803	11.6
Turnout				58.85

2012^[6]

Party		Candidate	Votes	%	±%
	Komeito	Hisashi Inatsu (PR block incumbent) (endorsed by the Liberal Democratic Party)	107,937	47.5
	Democratic	Tadamasa Kodaira (incumbent) (endorsed by the People's New Party)	62,998	30.9
	NP-Daichi	Takahiro Asano [ja] (PR block incumbent) (endorsed by the Tomorrow Party of Japan)	39,918	19.5
	JCP	Kenji Kimura	13,320	6.5

2009^[7]

Party		Candidate	Votes	%	±%
	Democratic	Tadamasa Kodaira (incumbent)	159,473	62.5
	LDP	Yukari Iijima (PR block incumbent)	89,287	35.1
	Happiness Realization	Makoto Obayashi	6,114	2.4

2005^[8]

Party		Candidate	Votes	%	±%
	Democratic	Tadamasa Kodaira (incumbent)	109,422	62.5
	Independent	Takafumi Yamashita [ja] (PR block incumbent)	78,604	29.4
	LDP	Yukari Iijima (elected to PR block)	62,100	2.4
	JCP	Tateo Tani	17,617	6.6

References

1. "北海道10区". go2senkyo. initial.inc. Retrieved 17 November 2021.
2. "Composition of the House" (in Japanese).
3. 開票速報 小選挙区：北海道 - 2021衆議 (in Japanese). NHK. Retrieved 18 November 2021.
4. "go2senkyo.com" (in Japanese). Retrieved 2017-11-02.
5. "go2senkyo.com" (in Japanese). Retrieved 2016-05-24.
6. "go2senkyo.com" (in Japanese). Retrieved 2016-05-24.
7. "go2senkyo.com" (in Japanese). Retrieved 2016-05-24.
8. "go2senkyo.com" (in Japanese). Retrieved 2016-05-24.