Hokkaido 10th district

Hokkaido 10th District
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)
Current constituency
Seats	One
Party	CDP
Representative	Hiroshi Kamiya
Created from	Portions of the former 2nd and 4th districts
Subprefecture	Sorachi and Rumoi (plus portions of Kamikawa and Sōya)

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.

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 retained the seat in subsequent elections until 2024.

List of representatives

Representative		Dates	Notes
Tadamasa Kodaira	DPJ	1996 – 2012	Also lost in the PR block
Hisashi Inatsu	KM	2012 – 2024
Hiroshi Kamiya	CDP	2024 –

Recent results

2024
Party		Candidate	Votes	%	±%
	CDP	Hiroshi Kamiya (PR seat incumbent)	78,362	50.77	4.70
	Komeito	Hisashi Inatsu (incumbent)	75,990	49.23	4.70
Majority			2,352	1.54
Registered electors			267,329
Turnout				59.90	4.90
	CDP gain from Komeito

2021^[2]
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^[3]
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^[4]
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^[5]
	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^[6]
	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^[7]
	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

^ "北海道10区". go2senkyo. initial.inc. Retrieved 17 November 2021.
^ 開票速報小選挙区：北海道 - 2021衆議 (in Japanese). NHK. Retrieved 18 November 2021.
^ "go2senkyo.com" (in Japanese). Retrieved 2017-11-02.
^ "go2senkyo.com" (in Japanese). Retrieved 2016-05-24.
^ "go2senkyo.com" (in Japanese). Retrieved 2016-05-24.
^ "go2senkyo.com" (in Japanese). Retrieved 2016-05-24.
^ "go2senkyo.com" (in Japanese). Retrieved 2016-05-24.

[1] "北海道10区". go2senkyo. initial.inc. Retrieved 17 November 2021.

[2] 開票速報小選挙区：北海道 - 2021衆議 (in Japanese). NHK. Retrieved 18 November 2021.

[3] "go2senkyo.com" (in Japanese). Retrieved 2017-11-02.

[4] "go2senkyo.com" (in Japanese). Retrieved 2016-05-24.

[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.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

v t e Hokkaidō's electoral districts for the Diet of Japan
FPTP "small" districts (1996–present) 1 2 3 4 5 6 7 8 9 10 11 12 (13) PR Hokkaidō PR block House of Councillors At-large (13→12 Representatives (PR block: 9→8), 4→6 Councillors)
SNTV "medium-sized" districts (1947–1993) 1 2 3 4 5 (22→23 Representatives, 8→4 Councillors)
Limited voting "large" districts (1946) 1 2 (23 Representatives)
SNTV "medium-sized" districts (1928–1942) 1 2 3 4 5 (20 Representatives)
FPTP/SNTV "small" districts (1920–1924) 1 2 3 4 5 6 7 8 9 10 11 12 (16 Representatives)
SNTV "large" districts era (1902–1917), in Hokkaidō FPTP single-member districts Sapporo city (ku) Hakodate city (ku) Otaru city (ku) subprefectures 1 subprefectures 2 subprefectures 3 (3→6 Representatives)

v t e First-past-the-post (FPTP) districts and proportional representation (PR) "blocks" for the Japanese House of Representatives of the National Diet (1996–present)
Speaker of the House of Representatives of Japan: Fukushiro Nukaga, Ibaraki 2nd Vice Speaker of the House of Representatives of Japan: Banri Kaieda, Tokyo PR
Hokkaidō (8 block seats, 12 district seats)	Hokkaidō 1 2 3 4 5 6 7 8 9 10 11 12
Tōhoku (12 block seats, 21 district seats)	Aomori 1 2 3 Iwate 1 2 3 Miyagi 1 2 3 4 5 Akita 1 2 3 Yamagata 1 2 3 Fukushima 1 2 3 4
Kita- (North) Kantō (19 block seats, 33 district seats)	Ibaraki 1 2 3 4 5 6 7 Tochigi 1 2 3 4 5 Gunma 1 2 3 4 5 Saitama 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Minami- (South) Kantō (23 block seats, 36 district seats)	Chiba 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Kanagawa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Yamanashi 1 2
Tokyo (19 block seats, 30 district seats)	Tokyo 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Hokuriku-Shin'etsu (10 block seats, 18 district seats)	Niigata 1 2 3 4 5 Toyama 1 2 3 Ishikawa 1 2 3 Fukui 1 2 Nagano 1 2 3 4 5
Tōkai (21 block seats, 33 district seats)	Gifu 1 2 3 4 5 Shizuoka 1 2 3 4 5 6 7 8 Aichi 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Mie 1 2 3 4
Kinki (28 block seats, 45 district seats)	Shiga 1 2 3 Kyoto 1 2 3 4 5 6 Osaka 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Hyōgo 1 2 3 4 5 6 7 8 9 10 11 12 Nara 1 2 3 Wakayama 1 2
Chūgoku (10 block seats, 17 district seats)	Tottori 1 2 Shimane 1 2 Okayama 1 2 3 4 Hiroshima 1 2 3 4 5 6 Yamaguchi 1 2 3
Shikoku (6 block seats, 10 district seats)	Tokushima 1 2 Kagawa 1 2 3 Ehime 1 2 3 Kōchi 1 2
Kyūshū (20 block seats, 34 district seats)	Fukuoka 1 2 3 4 5 6 7 8 9 10 11 Saga 1 2 Nagasaki 1 2 3 Kumamoto 1 2 3 4 Ōita 1 2 3 Miyazaki 1 2 3 Kagoshima 1 2 3 4 Okinawa 1 2 3 4
Districts eliminated in the 2002 reapportionments	Hokkaido 13 Yamagata 4 Shizuoka 9 Shimane 3 Oita 4
Districts eliminated in the 2013 reapportionments	Fukui 3 Yamanashi 3 Tokushima 3 Kochi 3 Saga 3
Districts eliminated in the 2017 reapportionments	Aomori 4 Iwate 4 Mie 5 Nara 4 Kumamoto 5 Kagoshima 5
Districts eliminated in the 2022 reapportionments	Miyagi 6 Fukushima 5 Niigata 6 Shiga 4 Wakayama 3 Okayama 5 Hiroshima 7 Yamaguchi 4 Ehime 4 Nagasaki 4