| Shikoku Proportional Representation Block | |
| Type: | Parliamentary |
| Parl Name: | Japanese House of Representatives |
| District Label: | Prefectures |
| District: | Ehime, Kagawa, Kōchi, Tokushima |
| Population: | 3,721,000 (October 2019 estimate)[1] |
| Electorate: | 3,205,495[2] |
| Members Label: | Representatives |
| Members: | 6 (LDP-3, CDP-1, Ishin-1, Komeito-1)[3] |
The Shikoku proportional representation block 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 shrank to six seats.
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 | DPJ | JCP | NFP ('96)/LP ('00) | JRP ('12)/JIP ('14) | Others | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Votes | % | Seats | Votes | % | Seats | Votes | % | Seats | Votes | % | Seats | Votes | % | Seats | Votes | % | Seats | Votes | % | Seats | Votes | % | Seats | ||
| 1996 | 785,589 | 41.6 | 3 | 245,323 | 13.8 | 1 | – | 227,014 | 12.1 | 1 | 132,868 | 7.1 | 0 | 455,269 | 24.2 | 2 | – | 39,067 | 2.1 | 0 | |||||
| 2000 | 700,719 | 36.0 | 3 | 402,457 | 20.7 | 1 | 266,791 | 13.7 | 1 | 213,729 | 11.0 | 1 | 196,277 | 10.1 | 0 | 162,700 | 8.4 | 0 | – | 5,316 | 0.3 | 0 | |||
| 2003 | 708,051 | 38.2 | 3 | 587,828 | 31.7 | 2 | 309,160 | 16.7 | 1 | 148,953 | 8.0 | 0 | 98,243 | 5.3 | 0 | – | – | – | |||||||
| 2005 | 821,746 | 38.3 | 3 | 711,927 | 33.2 | 2 | 317,575 | 14.8 | 1 | 175,994 | 8.2 | 0 | 119,089 | 5.5 | 0 | – | – | – | |||||||
| 2009 | 719,594 | 32.0 | 2 | 973,038 | 43.2 | 3 | 293,204 | 13.0 | 1 | 150,171 | 6.7 | 0 | 94,558 | 4.2 | 0 | – | – | 19,507 | 0.9 | 0 | |||||
| 2012 | 567,193 | 30.7 | 2 | 296,914 | 16.0 | 1 | 276,907 | 15.0 | 1 | 106,976 | 5.8 | 0 | 42,762 | 2.3 | 0 | – | 394,393 | 21.3 | 2 | 165,091 | 8.8 | 0 | |||
| 2014 | 547,185 | 34.9 | 3 | 326,803 | 20.8 | 1 | 247,776 | 15.8 | 1 | 158,848 | 10.1 | 0 | 33,257 | 2.1 | 0 | – | 200,882 | 12.8 | 1 | 55,277 | 3.1 | 0 | |||
Party names are abbreviated as follows (Romanisation of Japanese name in brackets):
Note: Party affiliations as of election day.
| Years | Elected representatives | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1996 | Naoaki Haruna | Masanori Gotō | Shōzō Nishimura | Hajime Morita | |||||||||
| 2000 | Naoaki Haruna | Masanori Gotō | Kazuyoshi Endō | Mamoru Nishida | Hajime Morita | Akira Shichijō | – | ||||||
| 2003 | Masanori Gotō | Noritoshi Ishida | Hajime Morita | Akira Shichijō | |||||||||
| 2005 | Masanori Gotō resigned 2005, replaced by Miho Takai | Noritoshi Ishida | Akira Shichijō | Yoshirō Okamoto | Katsuko Nishimoto | ||||||||
| 2009 | Hideyuki Takahashi | Noritoshi Ishida | Shun'ichi Yamaguchi | ||||||||||
| 2012 | Junya Ogawa | Arata Nishioka | Noritoshi Ishida | Yasuji Izuhara | |||||||||
| 2014 | Junya Ogawa | Noritoshi Ishida | Teru Fukui | Takakazu Seto | Mamoru Fukuyama | ||||||||
See main article: Results of the 2014 Japanese general election (Shikoku proportional representation block).
See main article: Results of the 2012 Japanese general election (Shikoku proportional representation block).
| LDP: 719,594 votes (32.0%), 2 seats | DPJ: 973,038 votes (43.2%), 3 seats | Kōmeitō: 293,204 votes (13.0%), 1 seat | |||||||||||||||
| Candidate | District | Elected | Candidate | District | "Loss ratio" | Elected | Candidate | District | "Loss ratio" | Elected | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Kagawa 1 | 83.3% | Elected | 1 | Tokushima 3 | 98.5% | Elected | 1 | PR only | Elected | |||||||
| Tokushima 2 | 80.2% | Elected | Ehime 1 | 97.8% | Elected | 2 | Hidehisa Ochiai | – | |||||||||
| Tokushima 3 | Won district | Ehime 4 | 89.7% | Elected | JCP: 150,171 votes (6.7%), no seat | ||||||||||||
| Ehime 1 | Won district | Won district | Candidate | District | "Loss ratio" | Elected | |||||||||||
| Ehime 2 | Won district | Tokushima 2 | Won district | 1 | Masaru Sasaoka | PR only | – | ||||||||||
| Ehime 4 | Won district | Kagawa 1 | Won district | 2 | Motonori Furuta | 10.8% | – | ||||||||||
| Kōchi 1 | Won district | Kagawa 2 | Won district | Michiko Chikaishi | Kagawa 3 | 9.9% | – | ||||||||||
| Kōchi 2 | Won district | Ehime 3 | Won district | Katsuhiko Tanaka | Ehime 1 | 6.1% | – | ||||||||||
| Kōchi 3 | Won district | Tomoi Nakayama | Kōchi 3 | 86.9% | – | SDP: 94,558 votes (4.2%), no seat | |||||||||||
| Tōru Shirai | Ehime 3 | 77.2% | – | Kumiko Tamura | Kōchi 1 | 86.4% | – | Candidate | District | "Loss ratio" | Elected | ||||||
| Kagawa 2 | 72.3% | – | Kiyo Kusumoto | Kōchi 2 | 65.9% | – | 1 | Tomoko Okahira | Ehime 2 | 89.9% | – | ||||||
| 51.8% | – | 12 | Kenshi Uno | PR only | – | Haruhiko Maida | Kagawa 3 | 73.3% | – | ||||||||
| 13 | PR only | – | 13 | Masuko Yoshida | – | HRP: 19,507 votes (0.9%), no seat | |||||||||||
| 14 | – | – | Candidate | District | "Loss ratio" | Elected | |||||||||||
| 15 | Masaharu Sasanuma | – | 1 | Akemi Takeo | PR only | – | |||||||||||
| 16 | Toshiyuki Minakuchi | – | 2 | Keiko Kushihata | – | ||||||||||||
| – | 3 | Yukinori Tōjō | – | ||||||||||||||
| 4 | Shūhei Oka | – | |||||||||||||||