Shikoku proportional representation block

The Shikoku proportional representation block (Hirei [daihyō] Shikoku burokku (比例[代表]四国ブロック)) is one of eleven proportional representation (PR) "blocks", multi-member constituencies for the House of Representatives in the Diet of Japan. It consists of Shikoku region covering Tokushima, Kagawa, Ehime and Kōchi Prefectures. Following the introduction of proportional voting it elected seven representatives in the 1996 general election. When the total number of PR seats was reduced from 200 to 180, the Shikoku PR block shrunk to six seats.

Summary of results

With a district magnitude of six, Shikoku is the smallest PR block. The vote share necessary to obtain a seat is usually well above ten percent. In three elections after the consolidation of the LDP-DPJ-party system by the merger of the LP into the DPJ in 2001, only the top three parties were able to win seats in Shikoku. In 2012, the LDP recorded its worst result since the introduction of proportional party list voting and the DPJ vote share crashed by more than 25 percentage points, the newly created Japan Restoration Party managed to gain two proportional seats in Shikoku.

general election LDPDPJ KōmeitōJCP SDPNFP ('96)/LP ('00) JRP ('12)/JIP ('14)Others
Votes%SeatsVotes%Seats Votes%SeatsVotes%Seats Votes%SeatsVotes%Seats Votes%SeatsVotes%Seats
1996 785,58941.63245,32313.81 –227,01412.11 132,8687.10455,26924.22 –39,0672.10
2000 700,71936.03402,45720.71 266,79113.71213,72911.01 196,27710.10162,7008.40 –5,3160.30
2003 708,05138.23587,82831.72 309,16016.71148,9538.00 98,2435.30– ––
2005 821,74638.33711,92733.22 317,57514.81175,9948.20 119,0895.50– ––
2009 719,59432.02973,03843.23 293,20413.01150,1716.70 94,5584.20– –19,5070.90
2012 567,19330.72296,91416.01 276,90715.01106,9765.80 42,7622.30– 394,39321.32165,0918.80
2014 547,18534.93326,80320.81 247,77615.81158,84810.10 33,2572.10– 200,88212.8155,2773.10

Party names are abbreviated as follows: (Romanisation of Japanese name in brackets):

List of representatives

Note: Party affiliations as of election day.

YearsElected Representatives
1996 Naoaki Haruna Masanori Gotō Kazuyoshi EndōShōzō Nishimura Ihei Ochi
died 2000, replaced by
Akira Shichijō		Mamoru NishidaHajime Morita
2000 Naoaki Haruna Masanori Gotō Kazuyoshi Endō Mamoru NishidaHajime MoritaAkira Shichijō –
2003 Miho TakaiMasanori Gotō Noritoshi Ishida Hajime MoritaYoshirō OkamotoAkira Shichijō
2005 Junya OgawaMasanori Gotō
resigned 2005, replaced by
Miho Takai		 Noritoshi Ishida Akira ShichijōYoshirō OkamotoKatsuko Nishimoto
2009 Hirobumi NikiTakako NagaeHideyuki Takahashi Noritoshi Ishida Takuya HiraiShun'ichi Yamaguchi
2012 Junya Ogawa Fumiki Sakurauchi Arata Nishioka Noritoshi Ishida Takakazu Seto Yasuji Izuhara
2014 Junya Ogawa Hiroyuki Yokoyama Noritoshi Ishida Teru Fukui Takakazu Seto Mamoru Fukuyama

Election results

2014 general election

Following on from the LDP landslide win at the 2012 general election, in which the party won 12 of the 13 electorates in Shikoku plus two of the six seats from the PR list,[1] the LDP maintained their dominant position in the region by retaining all 10 of their electorates[2] (two electorates were abolished to address voter malapportionment) and gaining a seat on the PR list from the dissolved Japan Restoration Party (JRP).

The JRP, which won 2 seats with 21.3% of the vote at the 2012 general election,[1] had split in May 2014, with former members subsequently forming the Japan Innovation Party and Party for Future Generations. Of the two JRP members previously elected from the Shikoku PR list, Fumiki Sakurauchi joined the Party for Future Generations and contested the PR block in 2014, while Arata Nishioka contested the Ehime 2nd district as an independent; both candidates lost.

Former Ehime Prefectural Assembly member Hiroyuki Yokoyama[3] was able to gain a seat for the Japan Innovation Party, while the Democratic Party of Japan (DPJ) and Komeito representatives were able to retain their seats.[2]

Elected candidates
Party Representative Party
rank		 Term #
LDP Teru Fukui 1 6th
DPJ Junya Ogawa 1 4th
LDP Mamoru Fukuyama 2 2nd
Komeito Noritoshi Ishida 1 7th
Innovation Hiroyuki Yokoyama 1 1st
LDP Takakazu Seto 3 2nd

2014 Japanese general election
House of Representatives
<< 2012 —

Enrolled voters 3,259,284[4]
Votes cast 1,619,862[4] Turnout 49.70[5] -8.29[5]
Informal votes 49834 Informal 3.08
Summary of votes by party
Party Seats Gains Losses Net
gain/loss		 Seats % Votes % Votes +/-
  Liberal Democratic 3 1 1 50.0 34.9 547,185 4.2
  Democratic 1 16.67 20.8 326,803 4.8
  Komeito 1 16.67 15.8 247,776 0.8
  Innovation 1 1 1 16.67 12.8 200,882 12.8
  Communist 0 0.0 10.1 158,848 4.3
  Future Generations 0 1 0.0 2.8 44,515 2.8
  Social Democratic 0 0.0 2.1 33,257 0.2
  Happiness Realization 0 0.00 0.7 10,762 0.3
Total 6 Turnout 1,570,028 -8.29%

2012 general election
Main article: 2012 Shikoku proportional representation block election

The ruling DPJ lost two of the three seats held in the district, as their vote was reduced to 16.0%, down from 43.2% in the 2009 election. This matched the heavy losses the party suffered nationwide as the LDP led by Shinzo Abe returned to power. The newly-formed Japan Restoration Party gained the two seats lost by the DPJ.[1] In the 13 single-member electorates, the LDP gained 4 seats, with Yuichiro Tamaki being the only DPJ member to retain his seat in the Kagawa 2nd district.[6]

Elected candidates
Party Representative Party
rank		 Term #
LDP Takakazu Seto 1 1st
Restoration Fumiki Sakurauchi 1 1st
DPJ Junya Ogawa 1 3rd
LDP Yasuji Izuhara 14 2nd
Komeito Noritoshi Ishida 1 6th
Restoration Arata Nishioka 1 1st

2012 Japanese general election
House of Representatives
<< 2009 — 2014 >>

Enrolled voters 3,291,313[7]
Votes cast 1,908,601[7] Turnout 49.70[8]
Informal votes 58,365 Informal 3.06
Summary of votes by party
Party Seats Gains Losses Net
gain/loss		 Seats % Votes % Votes +/-
  Liberal Democratic 2 33.33 30.7 567,193 1.3
  Restoration 2 2 2 33.33 21.3 394,393 21.3
  Democratic 1 2 2 16.67 16.0 296,914 27.2
  Komeito 1 16.67 15.0 276,907 2.0
  Communist 0 0.0 5.8 106,976 0.9
  Your 0 0.0 5.0 93,090 5.0
  Tomorrow 0 0.0 3.4 63,830 3.4
  Social Democratic 0 0.0 2.3 42,762 1.9
  Happiness Realization 0 0.00 0.4 8,171 0.9
Total 6 Turnout 1,908,601

2009 general election
Shikoku block results in the 2009 general election[9][10]
LDP: 719,594 votes (32.0%), 2 seats DPJ: 973,038 votes (43.2%), 3 seats Kōmeitō: 293,204 votes (13.0%), 1 seat
#CandidateDistrict"Loss ratio"
(sekihairitsu)		Elected #CandidateDistrict"Loss ratio"Elected #CandidateDistrict"Loss ratio"Elected
1Takuya HiraiKagawa 183.3%Elected 1Hirobumi NikiTokushima 398.5%Elected 1Noritoshi IshidaPR onlyElected
Shun'ichi YamaguchiTokushima 280.2%Elected Takako NagaeEhime 197.8%Elected 2Hidehisa Ochiai–
Masazumi GotōdaTokushima 3Won district Hideyuki TakahashiEhime 489.7%Elected JCP: 150,171 votes (6.7%), no seat
Yasuhisa ShiozakiEhime 1Won district Yoshito SengokuTokushima 1Won district #CandidateDistrict"Loss ratio"Elected
Seiichirō MurakamiEhime 2Won district Miho TakaiTokushima 2Won district 1Masaru SasaokaPR only–
Kōichi YamamotoEhime 4Won district Jun'ya OgawaKagawa 1Won district 2Motonori FurutaTokushima 110.8%–
Teru FukuiKōchi 1Won district Yūichirō TamakiKagawa 2Won district Michiko ChikaishiKagawa 39.9%–
Gen NakataniKōchi 2Won district Yōichi ShiraishiEhime 3Won district Katsuhiko TanakaEhime 16.1%–
Yūji YamamotoKōchi 3Won district Tomoi NakayamaKōchi 386.9%– SDP: 94,558 votes (4.2%), no seat
Tōru ShiraiEhime 377.2%– Kumiko TamuraKōchi 186.4%– #CandidateDistrict"Loss ratio"Elected
Yoshio KimuraKagawa 272.3%– Kiyo KusumotoKōchi 265.9%– 1Tomoko OkahiraEhime 289.9%–
Yoshirō OkamotoTokushima 151.8%– 12Kenshi UnoPR only– Haruhiko MaidaKagawa 373.3%–
13Akira ShichijōPR only– 13Masuko Yoshida– HRP: 19,507 votes (0.9%), no seat
14Katsuko Nishimoto– – #CandidateDistrict"Loss ratio"Elected
15Masaharu Sasanuma– 1Akemi TakeoPR only–
16Toshiyuki Minakuchi– 2Keiko Kushihata–
– 3Yukinori Tōjō–
4Shūhei Oka–

References
  1. "四国　【比例代表】 開票結果 総選挙2012 衆院選" [Shikoku (PR List) election results, 2012 general election, House of Reps election] (in Japanese). Yomiuri Shimbun. Retrieved 4 March 2016.
  2. "開票結果・速報（比例・四国） 衆院選2014（衆議院選挙）" [Election results: Shikoku PR List, 2014 House of Reps election] (in Japanese). Yomiuri Shimbun. Retrieved 4 March 2016.
  3. "横山博幸(比例・四国・維新) 衆院選2014(衆議院選挙)" [Hiroyuki Yokoyama (PR list, Shikoku, Innovation) House of Reps election 2014 (House of Representatives election)] (in Japanese). Yomiuri Shimbun. Retrieved 4 March 2016.
  4. "都道府県別有権者数、投票者数、投票率（比例代表）" [Registered voters, number of voters and turnout by prefecture (PR blocks)]. Retrieved 4 March 2016.
  5. "都道府県別有権者数、投票者数、投票率（比例代表）" [Registered voters, number of voters and turnout by prefecture (PR blocks)]. Retrieved 4 March 2016.
  6. "香川　小選挙区 開票結果 総選挙2012 衆院選 選挙" [Kagawa districts, election results, 2012 House of Representatives election] (in Japanese). Retrieved 31 May 2016.
  7. "都道府県別有権者数、投票者数、投票率（比例代表）" [Registered voters, number of voters and turnout by prefecture (PR blocks)]. Retrieved 7 March 2016.
  8. "都道府県別有権者数、投票者数、投票率（比例代表）" [Registered voters, number of voters and turnout by prefecture (PR blocks)]. Retrieved 7 March 2016.
  9. Ministry of Internal Affairs and Communications: Results of the 2009 general election
  10. Yomiuri Shimbun: Election feature 2009

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