This article presents detailed results of the 2005 Japanese general election. The results are separated into each of the eleven proportional representation blocks and their corresponding prefectures. In the following tables, candidates elected via single-member district are highlighted in green, while candidates elected via proportional representation are highlighted in red.

Electoral system

The House of Representatives is elected via parallel voting. In the 2005 election, 300 members were elected in single-member districts and 180 via party-list proportional representation in eleven multi-member constituencies, referred to as "PR blocks". Single-member districts are apportioned between prefectures and numbered (1st, 2nd, etc). Candidates may run solely in a single-member district, solely in PR, or both (dual listing). Dual listed candidates must win at least 10% of the vote in their single-member district in order to be eligible for election via PR. Dual listed candidates who win their single-member district race are not eligible for election via PR.

Candidates on PR lists may be ranked sequentially or, if they are dual listed, ranked equally with one another. If ranked equally, the best-loser ratio (sekihairitsu) of each candidate determines the order of election. This number is determined by dividing their single-member district votes by those of the winning candidate in that district. In this way, the losing candidates who performed best will be elected first.

If a party wins more seats than they have eligible candidates in a PR block, their seats will be distributed to other parties in accordance with the PR formula.

Hokkaido block

+ Single-member constituency results in Hokkaido Constituency Previous member Elected member Votes % Margin Runner-up % Status Hokkaido 1st Takahiro Yokomichi DPJ Takahiro Yokomichi DPJ 143,564 45.7 15,398 Takayuki Mishina LDP 40.8 DPJ hold Hokkaido 2nd Wakio Mitsui DPJ Wakio Mitsui DPJ 129,357 45.3 2,326 Takamori Yoshikawa LDP 44.5 DPJ hold Hokkaido 3rd Satoshi Arai DPJ Gaku Ishizaki LDP 138,765 48.4 13,320 Satoshi Arai DPJ 43.7 LDP gain from DPJ Hokkaido 4th Yoshio Hachiro DPJ Yoshio Hachiro DPJ 108,023 47.2 7,853 LDP 43.8 DPJ hold Hokkaido 5th Nobutaka Machimura LDP Nobutaka Machimura LDP 173,947 54.2 49,400 DPJ 38.8 LDP hold Hokkaido 6th Hiroshi Imazu LDP Takahiro Sasaki DPJ 143,860 46.7 2,761 Eiko Kaneta LDP 45.8 DPJ gain from LDP Hokkaido 7th LDP Hiroko Nakano DPJ 95,473 48.3 8,549 Naoto Kitamura LDP 43.9 DPJ gain from LDP Hokkaido 8th Seiichi Kaneta DPJ Seiichi Kaneta DPJ 134,963 49.8 20,822 LDP 42.1 DPJ hold Hokkaido 9th Yukio Hatoyama DPJ Yukio Hatoyama DPJ 150,050 49.3 18,920 LDP 43.1 DPJ hold Hokkaido 10th Tadamasa Kodaira DPJ Tadamasa Kodaira DPJ 109,422 40.9 30,818 Ind. 29.4 DPJ hold Hokkaido 11th Shōichi Nakagawa LDP Shōichi Nakagawa LDP 107,056 51.6 22,430 Tomohiro Ishikawa DPJ 40.6 LDP hold Hokkaido 12th Tsutomu Takebe LDP Tsutomu Takebe LDP 124,465 51.6 22,630 Kenko Matsuki DPJ 42.2 LDP hold

+Proportional representation results Party Votes Seats Rank Elected member Constituency Ratio DPJ 1,090,727 (33.8%) 3 1 Seiji Osaka 2 Satoshi Arai Hokkaido 3rd 90.4% 2 Kenko Matsuki Hokkaido 12th 81.8% LDP 940,705 (29.1%) 3 1 Yukari Iijima Hokkaido 10th 56.7% 2 Hiroshi Imazu 3 Takamori Yoshikawa Hokkaido 2nd 98.2% Daichi 433,938 (13.4%) 1 1 Muneo Suzuki Komei 368,552 (11.4%) 1 1 Kaori Maruya

Tohoku block

+ Single-member constituency results in Tohoku Constituency Previous member Elected member Votes % Margin Runner-up %! Status Aomori 1st Yūji Tsushima LDP Yūji Tsushima LDP 94,072 40.4 14,749 Hokuto Yokoyama DPJ 34.1 LDP hold Aomori 2nd Akinori Eto LDP Akinori Eto LDP 89,887 58.3 43,763 Tomonobu Nakamura DPJ 29.9 LDP hold Aomori 3rd Tadamori Ōshima LDP Tadamori Ōshima LDP 90,925 53.1 17,079 Masayo Tanabu DPJ 43.1 LDP hold Aomori 4th Tarō Kimura LDP Tarō Kimura LDP 113,704 55.9 72,215 DPJ 20.4 LDP hold Iwate 1st Takuya Tasso DPJ Takuya Tasso DPJ 95,109 51.7 29,922 Atsushi Oikawa LDP 35.4 DPJ hold Iwate 2nd Shun'ichi Suzuki LDP Shun'ichi Suzuki LDP 116,448 55.3 22,353 DPJ 44.7 LDP hold Iwate 3rd Toru Kikawada DPJ Toru Kikawada DPJ 102,477 55.1 32,660 LDP 37.5 DPJ hold Iwate 4th Ichirō Ozawa DPJ Ichirō Ozawa DPJ 124,578 59.9 76,485 Tokuichiro Tamazawa LDP 23.1 DPJ hold Miyagi 1st Vacant DPJ Tōru Doi LDP 117,236 47.3 1,972 Kazuko Kōri DPJ 46.5 LDP gain from DPJ Miyagi 2nd Kenya Akiba LDP Kenya Akiba LDP 130,257 52.8 31,612 Yukiko Monma DPJ 40.0 LDP hold Miyagi 3rd Akihiro Nishimura LDP Akihiro Nishimura LDP 98,269 52.3 19,766 DPJ 41.8 LDP hold Miyagi 4th Shintaro Ito LDP Shintaro Ito LDP 114,245 54.5 35,618 DPJ 37.5 LDP hold Miyagi 5th Jun Azumi DPJ Jun Azumi DPJ 78,205 50.7 9,720 LDP 44.4 DPJ hold Miyagi 6th Itsunori Onodera LDP Itsunori Onodera LDP 100,359 63.5 51,096 Tetsuo Kanno SDP 31.2 LDP hold Akita 1st Manabu Terata DPJ Manabu Terata DPJ 77,135 44.4 8,609 Koji Futada LDP 39.4 DPJ hold Akita 2nd Hosei Norota Ind. Hosei Norota Ind. 80,974 37.6 27,419 Takaki Ono LDP 24.9 Ind. hold Akita 3rd Nobuhide Minorikawa LDP Nobuhide Minorikawa LDP 114,228 41.3 31,748 DPJ 29.8 LDP hold Yamagata 1st Toshiaki Endo LDP Toshiaki Endo LDP 125,774 56.4 39,019 Michihiko Kano DPJ 38.9 LDP hold Yamagata 2nd Takehiko Endo LDP Takehiko Endo LDP 142,342 54.8 25,131 Yōsuke Kondō DPJ 45.2 LDP hold Yamagata 3rd Koichi Kato LDP Koichi Kato LDP 159,486 69.6 110,429 Onoichi Ito SDP 21.4 LDP hold Fukushima 1st Tatsuo Sato LDP Yoshitami Kameoka LDP 171,507 56.8 61,712 Shinichiro Ishihara DPJ 36.4 LDP hold Fukushima 2nd Takumi Nemoto LDP Takumi Nemoto LDP 125,447 52.8 24,498 Teruhiko Mashiko DPJ 42.5 LDP hold Fukushima 3rd Kōichirō Genba DPJ Kōichirō Genba DPJ 143,850 68.6 77,854 LDP 31.4 DPJ hold Fukushima 4th Kōzō Watanabe DPJ Kōzō Watanabe DPJ 91,440 48.5 6,637 Atsushi Watanabe LDP 45.0 DPJ hold Fukushima 5th Goji Sakamoto LDP Masayoshi Yoshino LDP 112,808 47.6 19,873 Izumi Yoshida DPJ 39.2 LDP hold

+Proportional representation results Party Votes Seats Rank Elected member Constituency Ratio LDP 1,901,595 (36.5%) 6 1 Goji Sakamoto 2 Masashi Nakano 3 Tatsuo Sato 4 Tokuichiro Tamazawa Iwate 4th 38.6% 5 Atsushi Watanabe Fukushima 4th 92.7% 5 Koji Futada Akita 1st 88.8% DPJ 1,748,165 (33.6%) 5 1 Kazuko Kōri Miyagi 1st 98.3% 1 Hokuto Yokoyama Aomori 1st 84.3% 1 Izumi Yoshida Fukushima 5th 82.3% 1 Yōsuke Kondō Yamagata 2nd 82.3% 1 Masayo Tanabu Aomori 3rd 81.2% Komei 620,638 (11.9%) 1 1 Yoshihisa Inoue SDP 362,523 (7.0%) 1 1 Tetsuo Kanno Miyagi 6th 49.0% JCP 325,176 (6.2%) 1 1 Chizuko Takahashi

Northern Kanto block

+ Single-member constituency results in Northern Kanto Constituency Previous member Elected member Votes % Margin Runner-up % Status Ibaraki 1st Norihiko Akagi LDP Norihiko Akagi LDP 144,499 58.3 57,500 Nobuyuki Fukushima DPJ 35.1 LDP hold Ibaraki 2nd Fukushiro Nukaga LDP Fukushiro Nukaga LDP 138,728 64.7 73,460 Makoto Kobayashi DPJ 30.5 LDP hold Ibaraki 3rd Yasuhiro Hanashi LDP Yasuhiro Hanashi LDP 113,977 46.8 31,136 DPJ 34.0 LDP hold Ibaraki 4th Hiroshi Kajiyama LDP Hiroshi Kajiyama LDP 122,200 63.2 62,259 DPJ 31.0 LDP hold Ibaraki 5th Akihiro Ohata DPJ Akihiro Ohata DPJ 74,753 49.4 4,655 Hideaki Okabe LDP 46.3 DPJ hold Ibaraki 6th Yuya Niwa LDP Yuya Niwa LDP 141,212 56.6 64,414 Ryoji Kawaguchi DPJ 30.8 LDP hold Ibaraki 7th Vacant LDP Kishirō Nakamura Ind. 89,099 42.1 7,869 Keiko Nagaoka LDP 38.4 Ind. gain from LDP Tochigi 1st Hajime Funada LDP Hajime Funada LDP 141,868 55.4 38,111 DPJ 40.5 LDP hold Tochigi 2nd Mayumi Moriyama LDP Mayumi Moriyama LDP 99,115 53.3 12,297 Akio Fukuda DPJ 46.7 LDP hold Tochigi 3rd Yoshimi Watanabe LDP Yoshimi Watanabe LDP 98,889 64.0 57,113 Takashi Kobayashi DPJ 27.0 LDP hold Tochigi 4th Tsutomu Sato LDP Tsutomu Sato LDP 140,304 54.2 31,831 Kenji Yamaoka DPJ 41.9 LDP hold Tochigi 5th Toshimitsu Motegi LDP Toshimitsu Motegi LDP 125,773 68.9 69,093 DPJ 31.1 LDP hold Gunma 1st Kōji Omi LDP Genichiro Sata LDP 136,920 55.8 58,376 Hitoshi Takahashi DPJ 32.0 LDP hold Gunma 2nd Takashi Sasagawa LDP Takashi Sasagawa LDP 99,919 47.3 1,422 Takashi Ishizeki DPJ 46.6 LDP hold Gunma 3rd Yoshio Yatsu LDP Yoshio Yatsu LDP 111,034 58.1 41,300 DPJ 36.5 LDP hold Gunma 4th Yasuo Fukuda LDP Yasuo Fukuda LDP 118,517 62.8 62,153 DPJ 29.9 LDP hold Gunma 5th Yūko Obuchi LDP Yūko Obuchi LDP 144,782 67.8 92,388 Kunihiko Tajima DPJ 24.6 LDP hold Saitama 1st Koichi Takemasa DPJ Koichi Takemasa DPJ 115,262 44.2 2,922 Zenjiro Kaneko LDP 43.1 DPJ hold Saitama 2nd DPJ Yoshitaka Shindō LDP 138,376 51.8 33,296 Katsuyuki Ishida DPJ 39.3 LDP gain from DPJ Saitama 3rd Ritsuo Hosokawa DPJ Hiroshi Imai LDP 140,010 51.3 30,194 Ritsuo Hosokawa DPJ 40.3 LDP gain from DPJ Saitama 4th Hideo Jinpu DPJ Chuko Hayakawa LDP 103,366 48.8 17,137 Hideo Jinpu DPJ 40.7 LDP gain from DPJ Saitama 5th Yukio Edano DPJ Yukio Edano DPJ 103,014 48.7 11,542 Hideki Makihara LDP 43.2 DPJ hold Saitama 6th Atsushi Oshima DPJ Atsushi Oshima DPJ 123,159 45.6 1,494 Kazuyuki Nakane LDP 45.1 DPJ hold Saitama 7th Yasuko Komiyama DPJ Kiyoshi Nakano LDP 122,274 48.8 15,732 Yasuko Komiyama DPJ 42.5 LDP gain from DPJ Saitama 8th Masahiko Shibayama LDP Masahiko Shibayama LDP 115,223 52.5 38,869 DPJ 34.8 LDP hold Saitama 9th Matsushige Ono LDP Matsushige Ono LDP 139,211 53.8 41,863 DPJ 37.6 LDP hold Saitama 10th Taimei Yamaguchi LDP Taimei Yamaguchi LDP 117,477 55.0 38,899 Tetsuhisa Matsuzaki DPJ 36.8 LDP hold Saitama 11th Ryuji Koizumi Ind. Etsuji Arai LDP 97,928 40.1 4,920 Ryuji Koizumi Ind. 38.1 LDP gain from Ind. Saitama 12th Toshio Masuda LDP Toshio Kojima LDP 129,783 56.0 45,078 Hiranao Honda DPJ 36.5 LDP hold Saitama 13th Shinako Tsuchiya LDP Shinako Tsuchiya LDP 124,494 54.1 38,875 DPJ 37.2 LDP hold Saitama 14th Takashi Mitsubayashi LDP Takashi Mitsubayashi LDP 128,642 53.1 36,058 DPJ 38.2 LDP hold Saitama 15th Satoshi Takayama DPJ Ryosei Tanaka LDP 106,961 49.0 21,685 Satoshi Takayama DPJ 39.1 LDP gain from DPJ

+Proportional representation results Party Votes Seats Rank Elected member Constituency Ratio LDP 2,892,780 (40.2%) 9 1 Kōji Omi 2 Koya Nishikawa 3 Kazuyuki Nakane Saitama 6th 98.7% 3 Zenjiro Kaneko Saitama 1st 97.4% 3 Hideaki Okabe Ibaraki 5th 93.7% 3 Keiko Nagaoka Ibaraki 7th 93.7% 3 Hideki Makihara Saitama 5th 88.7% 34 Fukuyo Nakamori 35 Masayoshi Namiki DPJ 2,260,717 (31.5%) 7 1 Takashi Ishizeki Gunma 2nd 98.5% 1 Akio Fukuda Tochigi 2nd 87.5% 1 Yasuko Komiyama Saitama 7th 87.1% 1 Hideo Jinpu Saitama 4th 83.4% 1 Satoshi Takayama Saitama 15th 79.7% 1 Ritsuo Hosokawa Saitama 3rd 78.4% 1 Kenji Yamaoka Tochigi 4th 77.3% Komei 937,345 (13.0%) 2 1 Keiichi Ishii 2 Otohiko Endō JCP 477,958 (6.6%) 1 1 Tetsuya Shiokawa Saitama 8th 24.1% SDP 323,979 (4.5%) 1 4 Fumihiro Himori

Southern Kanto block