This article presents detailed results of the 2003 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 2003 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 143,907 55.4 54,149 Takayuki Mishina LDP 34.6 DPJ hold Hokkaido 2nd Takamori Yoshikawa LDP Wakio Mitsui DPJ 107,840 45.6 24,267 Takamori Yoshikawa LDP 35.3 DPJ gain from LDP Hokkaido 3rd Satoshi Arai DPJ Satoshi Arai DPJ 114,131 46.8 2,879 Gaku Ishizaki LDP 45.6 DPJ hold Hokkaido 4th LDP Yoshio Hachiro DPJ 100,883 49.0 16,889 Shizuo Sato LDP 40.8 DPJ gain from LDP Hokkaido 5th Nobutaka Machimura LDP Nobutaka Machimura LDP 129,035 47.0 8,843 DPJ 43.7 LDP hold Hokkaido 6th DPJ Hiroshi Imazu LDP 112,270 40.2 614 Hidenori Sasaki DPJ 39.9 LDP gain from DPJ Hokkaido 7th Eiko Kaneta LDP LDP 85,585 49.8 13,077 Hiroko Nakano DPJ 42.2 LDP hold Hokkaido 8th Yoshio Hachiro DPJ Seiichi Kaneta DPJ 106,709 42.2 32,227 LDP 29.5 DPJ hold Hokkaido 9th Yukio Hatoyama DPJ Yukio Hatoyama DPJ 141,442 50.0 22,484 LDP 42.1 DPJ hold Hokkaido 10th Tadamasa Kodaira DPJ Tadamasa Kodaira DPJ 121,516 49.3 14,956 LDP 43.2 DPJ hold Hokkaido 11th Shōichi Nakagawa LDP Shōichi Nakagawa LDP 112,210 62.0 59,815 SDP 29.6 LDP hold Hokkaido 12th Tsutomu Takebe LDP Tsutomu Takebe LDP 118,258 54.3 35,527 Kenko Matsuki DPJ 38.0 LDP hold Hokkaido 13th LDP Seat abolished LDP loss

+Proportional representation results Party Votes Seats Rank Elected member Constituency Ratio DPJ 1,153,471 (40.8%) 4 3 Hokkaido 6th 99.4% 3 Hokkaido 5th 93.1% 3 Hiroko Nakano Hokkaido 7th 84.7% 3 Kenko Matsuki Hokkaido 12th 69.9% LDP 876,653 (31.0%) 3 1 Eiko Kaneta 2 Gaku Ishizaki Hokkaido 3rd 97.4% 2 Hokkaido 10th 87.6% Komei 394,843 (14.0%) 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 81,511 39.7 6,712 Hokuto Yokoyama Ind. 36.4 LDP hold Aomori 2nd Vacant IA Akinori Eto LDP 96,784 75.1 75,247 Koichi Saito SDP 16.7 LDP gain from IA Aomori 3rd Tadamori Ōshima LDP Tadamori Ōshima LDP 86,909 53.5 16,634 Masayo Tanabu DPJ 43.3 LDP hold Aomori 4th Tarō Kimura LDP Tarō Kimura LDP 110,675 63.6 69,811 DPJ 23.5 LDP hold Iwate 1st Takuya Tasso DPJ Takuya Tasso DPJ 91,025 53.6 33,126 Atsushi Oikawa LDP 34.1 DPJ hold Iwate 2nd Shun'ichi Suzuki LDP Shun'ichi Suzuki LDP 116,854 58.4 44,255 Kentaro Kudo DPJ 36.3 LDP hold Iwate 3rd Toru Kikawada DPJ Toru Kikawada DPJ 93,862 51.0 14,409 LDP 43.2 DPJ hold Iwate 4th Ichirō Ozawa DPJ Ichirō Ozawa DPJ 128,458 65.1 91,207 Tokuichiro Tamazawa LDP 18.9 DPJ hold Miyagi 1st Azuma Konno DPJ Azuma Konno DPJ 106,821 50.8 22,256 Tōru Doi LDP 40.2 DPJ hold Miyagi 2nd Sayuri Kamata DPJ Sayuri Kamata DPJ 98,028 45.4 3,407 Masashi Nakano LDP 43.8 DPJ hold Miyagi 3rd Hiroshi Mitsuzuka LDP Akihiro Nishimura LDP 74,045 46.3 242 DPJ 46.2 LDP hold Miyagi 4th Shintaro Ito LDP Shintaro Ito LDP 76,554 40.2 15,354 Ind. 32.1 LDP hold Miyagi 5th Jun Azumi DPJ Jun Azumi DPJ 73,135 50.7 9,013 LDP 44.5 DPJ hold Miyagi 6th Masamitsu Oishi DPJ Itsunori Onodera LDP 82,750 50.7 24,330 Masamitsu Oishi DPJ 35.8 LDP gain from DPJ Akita 1st Koji Futada LDP Manabu Terata DPJ 68,586 44.1 18,809 LDP 32.0 DPJ gain from LDP Akita 2nd Hosei Norota LDP Hosei Norota LDP 109,296 53.6 53,327 DPJ 27.5 LDP hold Akita 3rd LDP Nobuhide Minorikawa Ind. 133,981 49.7 16,528 Kanezo Muraoka LDP 43.5 Ind. gain from LDP Yamagata 1st Michihiko Kano DPJ Toshiaki Endo LDP 100,764 49.9 19,184 Michihiko Kano DPJ 40.4 LDP gain from DPJ Yamagata 2nd Takehiko Endo LDP Takehiko Endo LDP 124,591 51.8 17,745 Yōsuke Kondō DPJ 44.4 LDP hold Yamagata 3rd LDP Koichi Kato Ind. 137,206 58.9 52,260 DPJ 36.5 Ind. gain from LDP Yamagata 4th Koichi Kato Ind. Seat abolished Ind. loss Fukushima 1st Tatsuo Sato LDP Tatsuo Sato LDP 98,896 34.9 1,942 Yoshitami Kameoka IA 34.2 LDP hold Fukushima 2nd Takumi Nemoto LDP Takumi Nemoto LDP 108,838 51.0 14,324 Teruhiko Mashiko DPJ 44.3 LDP hold Fukushima 3rd Kōichirō Genba DPJ Kōichirō Genba DPJ 110,606 52.0 16,193 Hiroyuki Arai LDP 44.4 DPJ hold Fukushima 4th Kōzō Watanabe IA Kōzō Watanabe IA 97,014 52.3 18,955 LDP 42.0 IA hold Fukushima 5th Masayoshi Yoshino LDP Goji Sakamoto LDP 100,600 48.1 16,120 Izumi Yoshida DPJ 40.4 LDP hold

+Proportional representation results Party Votes Seats Rank Elected member Constituency Ratio LDP 1,794,284 (37.6%) 6 1 Masayoshi Yoshino 2 Koji Futada 3 4 5 Tokuichiro Tamazawa Iwate 4th 28.9% 6 Masashi Nakano Miyagi 2nd 96.5% DPJ 1,784,768 (37.4%) 5 1 Miyagi 3rd 99.6% 1 Teruhiko Mashiko Fukushima 2nd 86.8% 1 Yōsuke Kondō Yamagata 2nd 85.7% 1 Izumi Yoshida Fukushima 5th 83.9% 1 Michihiko Kano Yamagata 1st 80.9% Komei 565,179 (11.9%) 1 1 Yoshihisa Inoue JCP 313,290 (6.6%) 1 1 Chizuko Takahashi SDP 310,187 (6.5%) 1 1 Akita 2nd 25.2%

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 128,349 58.7 50,929 Nobuyuki Fukushima DPJ 35.4 LDP hold Ibaraki 2nd Fukushiro Nukaga LDP Fukushiro Nukaga LDP 127,364 66.5 71,920 Yoshiharu Tokoi DPJ 29.0 LDP hold Ibaraki 3rd LDP Yasuhiro Hanashi LDP 102,315 48.9 10,009 DPJ 44.1 LDP hold Ibaraki 4th Hiroshi Kajiyama LDP Hiroshi Kajiyama LDP 119,047 74.1 90,387 Shuichi Oshima SDP 17.8 LDP hold Ibaraki 5th Akihiro Ohata DPJ Akihiro Ohata DPJ 74,407 52.7 15,317 Hideaki Okabe LDP 41.9 DPJ hold Ibaraki 6th Yuya Niwa LDP Yuya Niwa LDP 130,525 58.6 55,610 Nobuaki Futami DPJ 33.6 LDP hold Ibaraki 7th Yoji Nagaoka LDP Yoji Nagaoka LDP 97,642 64.2 53,099 Hiroko Igarashi DPJ 29.3 LDP hold Tochigi 1st DPJ Hajime Funada LDP 123,297 53.1 21,170 Hiroko Mizushima DPJ 44.0 LDP gain from DPJ Tochigi 2nd Koya Nishikawa LDP Mayumi Moriyama LDP 96,224 59.5 36,214 Mamoru Kobayashi DPJ 37.1 LDP hold Tochigi 3rd Yoshimi Watanabe LDP Yoshimi Watanabe LDP 100,539 74.9 76,026 Shozo Maki JCP 18.3 LDP hold Tochigi 4th Tsutomu Sato LDP Tsutomu Sato LDP 125,031 52.8 20,872 Kenji Yamaoka DPJ 43.9 LDP hold Tochigi 5th Toshimitsu Motegi LDP Toshimitsu Motegi LDP 124,612 74.1 89,481 Hidenori Nakatsuka DPJ 20.9 LDP hold Gunma 1st Genichiro Sata LDP Kōji Omi LDP 130,242 60.5 61,282 Hitoshi Takahashi DPJ 32.0 LDP hold Gunma 2nd Takashi Sasagawa LDP Takashi Sasagawa LDP 76,779 43.4 19,448 Kei Ishizeki DPJ 32.4 LDP hold Gunma 3rd Yoshio Yatsu LDP Yoshio Yatsu LDP 91,330 54.9 24,243 Hiroyoshi Sasagawa DPJ 40.3 LDP hold Gunma 4th Yasuo Fukuda LDP Yasuo Fukuda LDP 98,903 62.1 50,476 Yukio Tomioka DPJ 30.4 LDP hold Gunma 5th Yūko Obuchi LDP Yūko Obuchi LDP 144,848 77.0 117,155 Masao Asagai SDP 14.7 LDP hold Saitama 1st Koichi Takemasa DPJ Koichi Takemasa DPJ 117,587 56.3 57,677 Zenjiro Kaneko NCP 28.7 DPJ hold Saitama 2nd Yoshitaka Shindō LDP DPJ 114,322 51.0 23,227 Yoshitaka Shindō LDP 40.6 DPJ gain from LDP Saitama 3rd Ritsuo Hosokawa DPJ Ritsuo Hosokawa DPJ 104,182 46.5 594 Hiroshi Imai LDP 46.3 DPJ hold Saitama 4th Vacant DPJ Hideo Jinpu DPJ 81,367 48.0 11,742 Chuko Hayakawa LDP 41.1 DPJ hold Saitama 5th Yukio Edano DPJ Yukio Edano DPJ 95,626 56.4 35,216 Shumei Takahashi LDP 35.6 DPJ hold Saitama 6th Atsushi Oshima DPJ Atsushi Oshima DPJ 112,794 48.1 9,283 Kaneshige Wakamatsu Komei 44.1 DPJ hold Saitama 7th Kiyoshi Nakano LDP Yasuko Komiyama DPJ 97,353 46.8 9,202 Kiyoshi Nakano LDP 42.4 DPJ gain from LDP Saitama 8th DPJ LDP 70,959 39.1 1,541 Atsushi Kinoshita DPJ 38.3 LDP gain from DPJ Saitama 9th Matsushige Ono LDP Matsushige Ono LDP 104,167 48.4 8,598 DPJ 43.9 LDP hold Saitama 10th Taimei Yamaguchi LDP Taimei Yamaguchi LDP 87,489 49.8 12,406 Tetsuhisa Matsuzaki DPJ 42.8 LDP hold Saitama 11th Ryuji Koizumi LDP Ryuji Koizumi LDP 123,057 63.9 70,328 Akiji Yagi DPJ 37.4 LDP hold Saitama 12th Toshio Kojima LDP Toshio Masuda LDP 95,889 51.7 20,450 Hiranao Honda DPJ 40.7 LDP hold Saitama 13th Shinako Tsuchiya LDP Shinako Tsuchiya LDP 81,935 43.2 574 DPJ 42.9 LDP hold Saitama 14th Takashi Mitsubayashi LDP Takashi Mitsubayashi LDP 104,066 50.3 17,240 DPJ 41.9 LDP hold Saitama 15th New seat Satoshi Takayama DPJ 80,745 46.3 22,223 Hikaru Matsunaga LDP 33.6 DPJ win

+Proportional representation results Party Votes Seats Rank Elected member Constituency Ratio DPJ 2,299,620 (37.9%) 8 1 Saitama 13th 99.2% 1 Saitama 8th 97.8% 1 Saitama 9th 90.7% 1 Ibaraki 3rd 90.2% 1 Tetsuhisa Matsuzaki Saitama 10th 85.8% 1 Saitama 14th 83.4% 1 Kenji Yamaoka Tochigi 4th 83.3% 1 Tochigi 1st 82.8% LDP 2,275,223 (37.5%) 8 1 Genichiro Sata 2 Toshio Kojima 3 Koya Nishikawa 4 5 6 Hiroshi Imai Saitama 3rd 99.4% 6 Kiyoshi Nakano Saitama 7th 90.5% 6 Chuko Hayakawa Saitama 4th 85.5% Komei 857,490 (14.1%) 3 1 Keiichi Ishii 2 Otohiko Endō 3 Hiroaki Nagasawa JCP 402,849 (6.6%) 1 1 Tetsuya Shiokawa Saitama 8th 26.0%

Southern Kanto block