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Iwate 1st district

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Japan House of Representatives constituency

Iwate 1st District
Parliamentary constituency
for the Japanese House of Representatives
Numbered map of Iwate Prefecture single-member districts
PrefectureIwate
Proportional DistrictTohoku
Electorate287,956 (Sept. 2024)
Current constituency
Created1994
SeatsOne
PartyCDP
RepresentativeTakeshi Shina (2007–)
Created fromIwate's 1st "medium-sized" district
MunicipalitiesThe city of Morioka, town of Shiwa and town of Yahaba

Iwate 1st district (岩手1区, Iwateikku) is a single-member constituency of the House of Representatives in the Diet of Japan. It is located in central Iwate and consists of the prefectural capital Morioka city and the two remaining towns in Shiwa district. Before 2017, it covered of the majority of the prefectural capital Morioka (the whole city without the former village of Tamayama) and Shiwa district. In 2012, 278,860 eligible voters were registered in the district.

Before the electoral reform of 1994, the area had been part of the multi-member Iwate 1st district that elected four Representatives by single non-transferable vote.

Iwate is the home of Ichirō Ozawa and like three of the prefecture's four post-reform districts, the 1st district had been represented by his parties from its creation to 2012: the New Frontier Party, the Liberal Party and the Democratic Party. In 2012, Ozawa and his followers split from the Democratic Party: 1st district representative Shina stayed with the Democrats, Ozawa's Tomorrow Party of Japan nominated Yōko Tasso, the wife of former representative and current Iwate governor Takuya Tasso; but Shina defended the district against Tasso and Liberal Democratic former prefectural assembly member Hinako Takahashi who won a proportional block seat.

List of representatives

Representative Party Dates Notes
Takuya Tasso NFP 1996–2000
LP 2000–2003
DPJ 2003–2007 Resigned. Elected Governor of Iwate Prefecture in 2007
Takeshi Shina DPJ 2007–2016
DP 2016–2017
Kibō no Tō 2017–2018
DPP 2018–2020
CDP 2020–

Election results

2024
Party Candidate Votes % ±%
CDP Takeshi Shina 94,409 61.5 Increase10.3
LDP Hiromasa Yonai 43,623 28.4 Decrease8.4
JCP Kyōko Yoshida 15,367 10.0 Decrease1.9
Registered electors 287,457
Turnout 54.37 Decrease4.44
CDP hold
2021
Party Candidate Votes % ±%
CDP Takeshi Shina 87,017 51.2 Decrease1.4
LDP Hinako Takahashi 62,666 36.9 Increase2.4
JCP Kyōko Yoshida 20,300 11.9 Decrease1.0
Registered electors 293,290
Turnout 58.81 Increase1.79
CDP hold
2017
Party Candidate Votes % ±%
Kibō no Tō Takeshi Shina 87,534 52.6
LDP Hinako Takahashi (elected in Tohoku PR block) 57,381 34.5 Increase3.1
JCP Kyōko Yoshida 21,549 12.9 Increase2.5
Registered electors 296,551
Turnout 57.02 Increase3.52
2014
Party Candidate Votes % ±%
Democratic Takeshi Shina (DC) 76,787 52.0 +17.3
LDP Hinako Takahashi (DC, won PR seat) 46,409 31.4 +4.1
JCP Kyōko Yoshida 15,374 10.4 new
Social Democratic Mitsumasa Hosokawa (DC, $) 9,052 6.1 new
2012
Party Candidate Votes % ±%
Democratic Takeshi Shina (endorsed by PNP, DC) 55,909 34.7
LDP Hinako Takahashi (DC, elected by PR) 44,002 27.3
Tomorrow Yōko Tasso (endorsed by NPD, DC) 41,706 25.9
Social Democratic Masahiro Isawa (DC, $) 9,922 6.2
JCP Shino Yahata ($) 9,473 5.9
2009
Party Candidate Votes % ±%
Democratic Takeshi Shina (endorsed by PNP) 116,425 60.2
LDP Hinako Takahashi (endorsed by Komeito) 50,585 26.2
Social Democratic Masahiro Isawa 13,048 6.8
JCP Kyōko Yoshida 12,187 6.3
Happiness Realization Kensaku Mori 1,047 0.5
Turnout 195,474 70.93
By-election, July 29, 2007
Party Candidate Votes % ±%
Democratic Takeshi Shina (endorsed by PNP) 102,987 61.7
LDP Masanori Tamazawa (endorsed by Komeito) 53,125 31.8
JCP Sadakiyo Segawa 10,821 6.5
Turnout 169,092 61.05
2005
Party Candidate Votes % ±%
Democratic Takuya Tasso 95,109 51.7
LDP Atsushi Oikawa 65,187 35.4
Social Democratic Mitsumasa Hosokawa 14,050 7.6
JCP Shin'ya Kanbe 9,659 5.2
Turnout 185,845 67.93
2003
Party Candidate Votes % ±%
Democratic Takuya Tasso 91,025 53.6
LDP Atsushi Oikawa 57,899 34.1
Social Democratic Yuriko Gotō 12,014 7.1
JCP Yōichi Naganuma 8,806 5.2
Turnout 171,880 63.34
2000
Party Candidate Votes % ±%
Liberal Takuya Tasso 97,835 43.0
LDP Tokuichirō Tamazawa 65,597 37.7
Social Democratic Yuriko Gotō 17,309 9.9
JCP Ryūgorō Satō 9,261 5.3
Democratic Kikuji Fujikura 6,964 4.0
1996
Party Candidate Votes % ±%
New Frontier Takuya Tasso 67,420 40.6
LDP Tokuichirō Tamazawa (elected by PR) 49,665 29.9
Independent Riki Nakamura 17,087 10.3
Social Democratic Kuniki Yamanaka 16,758 10.1
JCP Toshiko Sakuma 10,668 6.4
Democratic Yuriko Gotō 4,551 2.7
Turnout 168,434 65.63

References

  1. Ministry of Internal Affairs and Communications (MIC): (in Japanese)
  2. MIC: 2017 changes to House of Representatives electoral districts, Map and table of changes in Iwate (in Japanese)
  3. Ministry of Internal Affairs and Communications (MIC): 平成24年9月2日現在選挙人名簿及び在外選挙人名簿登録者数 (in Japanese)
  4. 小選挙区 岩手1区 (in Japanese). NHK. Retrieved January 8, 2025.
  5. 小選挙区 岩手[1区 (in Japanese). NHK. Retrieved January 8, 2025.
  6. 小選挙区 岩手[1区 (in Japanese). NHK. Retrieved January 8, 2025.
  7. 総選挙2014>開票結果 小選挙区 岩手. Yomiuri Shimbun (in Japanese). Retrieved October 8, 2017.
  8. 総選挙2012>開票結果 小選挙区 岩手. Yomiuri Shimbun (in Japanese). Retrieved October 8, 2017.
  9. 衆議院>第45回衆議院議員選挙>岩手県>岩手1区. ザ・選挙 (in Japanese). K.K. VoiceJapan. Retrieved January 8, 2025.
  10. 衆議院>第44回衆議院議員補欠選挙. ザ・選挙 (in Japanese). K.K. VoiceJapan. Retrieved May 7, 2011.
  11. 衆議院>第44回衆議院議員選挙>岩手県>岩手1区. ザ・選挙 (in Japanese). K.K. VoiceJapan. Retrieved January 8, 2025.
  12. 衆議院>第43回衆議院議員選挙>岩手県>岩手1区. ザ・選挙 (in Japanese). K.K. VoiceJapan. Retrieved January 8, 2025.
  13. 衆議院>第42回衆議院議員選挙>岩手県>岩手1区. ザ・選挙 (in Japanese). K.K. VoiceJapan. Retrieved January 8, 2025.
  14. 衆議院>第41回衆議院議員選挙>岩手県>岩手1区. ザ・選挙 (in Japanese). K.K. VoiceJapan. Retrieved January 8, 2025.
Iwate's electoral districts for the Diet of Japan
FPTP "small" districts (1996–present)
1
2
3
(4)
PR
part of the Tōhoku PR block (16→14→13→12 seats)
House of Councillors
At-large (4→3 Representatives, 2 Councillors)
SNTV "medium-sized" districts (1947–1993)
1
2 (8→7 Representatives, 2 Councillors)
Limited voting "large" districts (1946)
At-large (8 Representatives)
SNTV "medium-sized" districts (1928–1942)
1
2 (7 Representatives)
FPTP/SNTV "small" districts (1920–1924)
1
2
3
4
5
6
7 (7 Representatives)
SNTV "large" districts (1902–1917)
Morioka city
counties (gunbu) (6 Representatives)
FPTP/bloc voting "small" districts (1890–1898)
1
2
3
4
5 (5 Representatives)
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
Block
8 seats
Hokkaidō
1
2
3
4
5
6
7
8
9
10
11
12
Tōhoku
Block
12 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
Block
19 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
Block
23 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
Block
19 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
Block
10 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
Block
21 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
Block
28 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
Block
10 seats
Tottori
1
2
Shimane
1
2
Okayama
1
2
3
4
Hiroshima
1
2
3
4
5
6
Yamaguchi
1
2
3
Shikoku
Block
6 seats
Tokushima
1
2
Kagawa
1
2
3
Ehime
1
2
3
Kōchi
1
2
Kyūshū
Block
20 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
Eliminated districts
Eliminiated in 2002
Hokkaido 13
Yamagata 4
Shizuoka 9
Shimane 3
Oita 4
Eliminiated in 2013
Fukui 3
Yamanashi 3
Tokushima 3
Kochi 3
Saga 3
Eliminiated in 2017
Aomori 4
Iwate 4
Mie 5
Nara 4
Kumamoto 5
Kagoshima 5
Eliminiated in 2022
Miyagi 6
Fukushima 5
Niigata 6
Shiga 4
Wakayama 3
Okayama 5
Hiroshima 7
Yamaguchi 4
Ehime 4
Nagasaki 4

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