The is one of eleven proportional representation (PR) "blocks", multi-member constituencies for the House of Representatives in the Diet of Japan. It consists of the prefectures of Tottori, Shimane, Okayama, Hiroshima, and Yamaguchi. Following the introduction of proportional voting, Chūgoku elected 13 representatives by PR in the 1996 general election, reduced to 11 in the election of 2000, and again to 10 in 2024.
Results timeline Vote share Party 1996 2000 2003 2005 2009 2012 2014 2017 2021 2024 2026 LDP 42.81 35.59 37.41 36.72 32.37 34.53 38.16 39.18 43.36 35.89 43.17 NFP 23.96 DPJ 12.59 21.68 33.80 28.59 39.73 16.28 17.08 JCP 9.66 8.91 6.31 5.90 5.71 4.98 9.19 6.25 5.55 5.07 3.66 SDP 6.37 9.23 4.77 5.15 3.64 1.96 2.11 1.39 1.69 1.82 1.25 NPS 1.19 Komeito 15.32 17.71 15.74 12.95 14.08 16.66 14.94 13.98 12.04 LP 8.87 PNP 7.90 4.85 Ishin 17.75 12.71 4.74 9.18 6.37 7.10 Your 5.98 TPJ 4.03 CDP 16.72 18.38 19.45 KnT 16.13 DPFP 3.65 10.45 9.09 Reiwa 3.03 5.90 2.90 Sanseitō 3.00 8.39 CRA 20.64 Others 3.41 0.40 0.75 0.41 4.09 0.65 1.18 1.35 Turnout 64.97 61.74 68.90 70.94 58.35 51.96 52.58 52.69 51.19 52.47
Seat distribution Election Distribution Seats 1996 13 2000 11 2003 11 2005 11 2009 11 2012 11 2014 11 2017 11 2021 11 2024 10 2026 10
List of representatives D'Hondt allocation order 1996 2000 2003 2005 2009 2012 2014 2017 1 Kiichi Miyazawa Hisaoki Kamei Toshiko Abe Shunji Yuhara Toshifumi Kojima Toshiko Abe Toshifumi Kojima2 Tetsuo Saito Toshiko Abe Kei Nakamaru Toshifumi Kojima Mio Sugita3 Yoshio Sakurauchi Yoshiro Hayashi Katsuyuki Kawai Katsunobu Kato Takashi Takai Toshiko Abe Michiyoshi Yunoki Akiko Kamei4 Yoshiro Hayashi Tetsuo Saito Tetsuo Saito Tetsuo Saito Yoshitaka Murata Michiyoshi Yunoki Tetsuo Saito Michiyoshi Yunoki5 Daikichi Ishibashi Keisuke Tsumura Mitsuo Mitani Hiroshi Sugakawa Tetsuo Saito Masayoshi Shintani Tetsuo Saito6 Keigo Masuya Katsunobu Kato Yoshitake Masuhara Tetsuo Saito Masayoshi Yoshino Takashi Takai Michitaka Ikeda 7 Koji Sato Daisuke Matsumoto Katsuyuki Kawai Daisuke Sakamoto Michitaka Ikeda Keiichi Furuta8 Seiji Hagiwara Hiroki Hanasaki Mitsuhiro Uesugi Yoshinobu Ohira Takashi Takai9 Kozo Hirabayashi Keigo Masuya Hisaoki Kamei Hidenao Nakagawa Keisuke Tsumura Keisuke Tsumura Keisuke Tsumura 10 Mutsuki Kato Koji Sato Keigo Masuya Noboru Miura Keigo Masuya Keigo Masuya Shogo Nemoto11 Keigo Masuya Shinji Sato Gaku Hashimoto Toshiaki Komuro Michitaka Ikeda Keiichi Furuta Keigo Masuya 12Tadatoshi Akiba 13
Election results 2026 + 2026 results in the Chugoku PR block Party Votes Swing % Seats +/– Liberal Democratic Party (LDP) 1,297,078 43.17 7.28 5 0 Centrist Reform Alliance (CRA) 620,211 20.64 10.85 2 2 Democratic Party For the People (DPFP) 273,263 9.09 1.36 1 0 Sanseitō 252,036 8.39 5.39 1 1 Japan Innovation Party (Ishin) 213,428 7.10 0.73 1 1 Japanese Communist Party (JCP) 109,968 3.66 1.41 0 0 Reiwa Shinsengumi (Reiwa) 87,272 2.90 3.00 0 0 Conservative Party of Japan (CPJ) 73,431 2.44 New 0 New Tax Cuts Japan and Yukoku Alliance (Genyu) 40,460 1.35 New 0 New Social Democratic Party (SDP) 37,654 1.25 0.57 0 0 Total 3,004,801 100.00 10 Invalid votes 55,122 1.80 Turnout 3,059,923 52.47 1.28 Registered voters 5,832,097
2024 + 2024 results in the Chugoku PR block Party Votes Swing % Seats +/– Liberal Democratic Party (LDP) 1,056,320 35.89 7.47 5 1 Constitutional Democratic Party of Japan (CDP) 572,598 19.45 1.08 3 1 Komeito 354,291 12.04 1.95 1 1 Democratic Party For the People (DPFP) 307,681 10.45 6.80 1 1 Japan Innovation Party (Ishin) 187,517 6.37 2.81 0 1 Reiwa Shinsengumi (Reiwa) 173,622 5.90 2.87 0 0 Japanese Communist Party (JCP) 149,218 5.07 0.48 0 0 Sanseitō 88,358 3.00 New 0 New Social Democratic Party (SDP) 53,620 1.82 0.13 0 0 Total 2,943,225 100.00 10 1 Invalid votes 78,661 2.60 Turnout 3,021,886 51.19 1.49 Registered voters 5,902,785
2021 + 2021 results in the Chugoku PR block Party Votes Swing % Seats +/– Liberal Democratic Party (LDP) 1,352,723 43.36 4.18 6 1 Constitutional Democratic Party of Japan (CDP) 573,324 18.38 1.66 2 0 Komeito 436,220 13.98 0.98 2 0 Japan Innovation Party (Ishin) 286,302 9.18 4.43 1 1 Japanese Communist Party (JCP) 173,117 5.55 0.70 0 0 Democratic Party For the People (DPFP) 113,899 3.65 New 0 New Reiwa Shinsengumi (Reiwa) 94,446 3.03 New 0 New Social Democratic Party (SDP) 52,638 1.69 0.30 0 0 NHK Party 36,758 1.18 New 0 New Total 3,119,427 100.00 11 Invalid votes 72,840 2.28 Turnout 3,192,267 52.69 0.11 Registered voters 6,058,900
2017 + 2017 results in the Chugoku PR block Party Votes Swing % Seats +/– Liberal Democratic Party (LDP) 1,249,073 39.18 1.02 5 0 Constitutional Democratic Party of Japan (CDP) 533,050 16.72 New 2 New Kibō no Tō 514,191 16.13 New 2 New Komeito 476,270 14.94 1.72 2 0 Japanese Communist Party (JCP) 199,152 6.25 2.95 0 1 Japan Innovation Party (Ishin) 151,221 4.74 New 0 New Social Democratic Party (SDP) 44,240 1.39 0.72 0 0 Happiness Realization Party (HRP) 20,701 0.65 0.07 0 0 Total 3,187,898 100.00 11 Invalid votes 66,055 2.03 Turnout 3,253,953 52.58 0.61 Registered voters 6,189,041
2014 + 2014 results in the Chugoku PR block Party Votes Swing % Seats +/– Liberal Democratic Party (LDP) 1,183,903 38.16 3.63 5 0 Democratic Party of Japan (DPJ) 529,819 17.08 0.80 2 0 Komeito 516,892 16.66 2.58 2 0 Japan Innovation Party (JIP) 394,306 12.71 5.04 1 1 Japanese Communist Party (JCP) 285,224 9.19 4.21 1 1 Party for Future Generations 109,016 3.51 New 0 New Social Democratic Party (SDP) 65,349 2.11 0.15 0 0 Happiness Realization Party (HRP) 18,015 0.58 0.17 0 0 Total 3,102,524 100.00 11 Invalid votes 75,864 2.39 Turnout 3,178,388 51.96 6.38 Registered voters 6,116,465
2012 + 2012 results in the Chugoku PR block Party Votes Swing % Seats +/– Liberal Democratic Party (LDP) 1,210,400 34.53 2.16 5 1 Japan Restoration Party (JRP) 622,226 17.75 New 2 New Democratic Party of Japan (DPJ) 570,764 16.28 23.45 2 4 Komeito 493,800 14.08 1.13 2 1 Your Party 209,627 5.98 New 0 New Japanese Communist Party (JCP) 174,648 4.98 0.72 0 0 Tomorrow Party of Japan (TPJ) 141,360 4.03 New 0 New Social Democratic Party (SDP) 68,653 1.96 1.69 0 0 Happiness Realization Party (HRP) 14,383 0.41 0.34 0 0 Total 3,505,861 100.00 11 Invalid votes 82,531 2.30 Turnout 3,588,392 58.35 12.59 Registered voters 6,150,109
2009 + 2009 results in the Chugoku PR block Party Votes Swing % Seats +/– Democratic Party of Japan (DPJ) 1,704,242 39.73 11.13 6 3 Liberal Democratic Party (LDP) 1,388,451 32.37 3.45 4 1 Komeito 555,552 12.95 2.79 1 1 Japanese Communist Party (JCP) 244,761 5.71 0.20 0 0 People's New Party (PNP) 208,208 4.85 3.04 0 1 Social Democratic Party (SDP) 156,291 3.64 1.51 0 0 Happiness Realization Party (HRP) 32,319 0.75 New 0 New Total 4,289,824 100.00 11 Invalid votes 106,928 2.43 Turnout 4,396,752 70.94 2.04 Registered voters 6,197,763
2005 + 2005 results in the Chugoku PR block Party Votes Swing % Seats +/– Liberal Democratic Party (LDP) 1,537,080 36.72 0.69 5 0 Democratic Party of Japan (DPJ) 1,196,971 28.59 5.21 3 1 Komeito 658,702 15.74 1.97 2 0 People's New Party (PNP) 330,546 7.90 New 1 New Japanese Communist Party (JCP) 247,073 5.90 0.41 0 0 Social Democratic Party (SDP) 215,636 5.15 0.38 0 0 Total 4,186,008 100.00 11 Invalid votes 105,032 2.45 Turnout 4,291,040 68.90 7.15 Registered voters 6,228,051
2003 + 2003 results in the Chugoku PR block Party Votes Swing % Seats +/– Liberal Democratic Party (LDP) 1,388,768 37.41 1.82 5 1 Democratic Party of Japan (DPJ) 1,254,880 33.80 12.12 4 2 Komeito 657,311 17.71 2.39 2 0 Japanese Communist Party (JCP) 234,359 6.31 2.60 0 1 Social Democratic Party (SDP) 176,942 4.77 4.46 0 1 Total 3,712,260 100.00 11 Invalid votes 120,691 3.15 Turnout 3,832,951 61.74 3.23 Registered voters 6,207,801
2000 + 2000 results in the Chugoku PR block Party Votes Swing % Seats +/– Liberal Democratic Party (LDP) 1,364,938 35.59 7.23 4 2 Democratic Party of Japan (DPJ) 831,747 21.68 9.09 2 0 Komeito 587,603 15.32 New 2 New Social Democratic Party (SDP) 353,973 9.23 2.86 1 0 Japanese Communist Party (JCP) 341,851 8.91 0.75 1 0 Liberal Party (LP) 340,358 8.87 New 1 New Liberal League (LL) 15,164 0.40 New 0 New Total 3,835,634 100.00 11 2 Invalid votes 165,994 4.15 Turnout 4,001,628 64.97 Registered voters 6,158,811
1996 + 1996 results in the Chugoku PR block Party Votes % Seats Liberal Democratic Party (LDP) 1,578,140 42.81 6 New Frontier Party (NFP) 883,319 23.96 3 Democratic Party (DP) 464,197 12.59 2 Japanese Communist Party (JCP) 356,108 9.66 1 Social Democratic Party (SDP) 234,642 6.37 1 New Socialist Party (NSP) 125,824 3.41 0 New Party Sakigake (NPS) 43,772 1.19 0 Total 3,686,002 100.00 13
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