# 2004 Japanese House of Councillors election

House of Councillors elections were held in Japan on 11 July 2004. The House of Councillors consisted of 242 members who served six-year terms. Approximately half the members are elected every three years. At these elections 121 members were elected. Of these 73 were elected from the 47 prefectural districts and 48 were elected from a nationwide list by proportional representation.

## Contesting parties
### Government

* Liberal Democratic Party (conservative)
* New Komeito (theocratic Buddhist, conservative)

### Opposition

* Democratic Party (social-democratic/liberal)
* Japanese Communist Party (communist)
* Social Democratic Party (social-democratic)

## Results

The opposition Democratic Party won a plurality of the popular vote and seats contested in the election, sweeping the liberal urban areas. The ruling Liberal Democratic Party failed to win in its strongholds but once more received most of its support from the agrarian areas. New Komeito did well, reaching its goals, as did the Social Democratic Party. The Japanese Communist Party did not reach its goals, while independents won the rest of the seats. The Liberal League and Green Political Assembly failed to win any seats.
Seats :
| Party | Party | Votes | % | Seats | Votes | % | Seats | Not up | Won | Total after | +/– |
| | Democratic Party of Japan | 21,137,457 | 37.79 | 19 | 21,931,985 | 39.09 | 31 | 32 | 50 | 82 | +23 |
| | Liberal Democratic Party | 16,797,686 | 30.03 | 15 | 19,687,954 | 35.09 | 34 | 66 | 49 | 115 | +5 |
| | New Komeito Party | 8,621,265 | 15.41 | 8 | 2,161,764 | 3.85 | 3 | 13 | 11 | 24 | +1 |
| | Japanese Communist Party | 4,362,574 | 7.80 | 4 | 5,520,141 | 9.84 | 0 | 5 | 4 | 9 | –11 |
| | Social Democratic Party | 2,990,666 | 5.35 | 2 | 984,340 | 1.75 | 0 | 3 | 2 | 5 | –3 |
| | Women's Party | 989,882 | 1.77 | 0 | | | | 0 | 0 | 0 | 0 |
| | Green Political Assembly | 903,776 | 1.62 | 0 | | | | 0 | 0 | 0 | New |
| | Ishin Seito Shimpu | 128,478 | 0.23 | 0 | 117,780 | 0.21 | 0 | 0 | 0 | 0 | 0 |
| | Other parties | | | | 8,382 | 0.01 | 0 | 0 | 0 | 0 | – |
| | Independents | | | | 5,696,505 | 10.15 | 5 | 2 | 5 | 7 | –1 |
| Total | Total | 55,931,784 | 100.00 | 48 | 56,108,851 | 100.00 | 73 | 121 | 121 | 242 | –5 |
| Valid votes | Valid votes | 55,931,785 | 96.42 | | 56,108,852 | 96.75 | | | | | |
| Invalid/blank votes | Invalid/blank votes | 2,074,327 | 3.58 | | 1,881,905 | 3.25 | | | | | |
| Total votes | Total votes | 58,006,112 | 100.00 | | 57,990,757 | 100.00 | | | | | |
| Registered voters/turnout | Registered voters/turnout | 102,588,411 | 56.54 | | 102,507,526 | 56.57 | | | | | |
| Source: MIC, National Diet ||||||||||||

### By prefecture

Elected candidates in bold
Compiled from JANJAN's "The Senkyo" and MIC official results.
Notes:
* All incumbents not running for re-election in their prefectural electoral district are counted as retirements even if they ran in the nationwide proportional representation.
* In a multi-member district, there is no difference between Councillors elected with the highest and lower vote shares. Yet, "top tōsen", i.e. being elected with the highest vote, is considered a special achievement and thus noted where changed from the previous election for the same class of Councillors (1998).
* Niigata is counted as an SDP hold because the elected Councillor joined the SDP parliamentary group.
Northern Japan :
| Prefecture | Seats up | Incumbents | Party | Result | Result | Candidates (Party) Vote share |
| Hokkaido | 2 | Naoki Minezaki | DPJ | Incumbents re-elected LDP gains top tōsen | | Yoshio Nakagawa (LDP) 26.7% Naoki Minezaki (DPJ) 22.3% Masahito Nishikawa (DPJ) 19.9% Muneo Suzuki (I) 17.5% Chiharu Oka (JCP) 9.2% Keiko Yamauchi (SDP) 3.8% Nobuhito Sendai (Ishin) 0.7% |
| Hokkaido | 2 | Yoshio Nakagawa | LDP | Incumbents re-elected LDP gains top tōsen | | Yoshio Nakagawa (LDP) 26.7% Naoki Minezaki (DPJ) 22.3% Masahito Nishikawa (DPJ) 19.9% Muneo Suzuki (I) 17.5% Chiharu Oka (JCP) 9.2% Keiko Yamauchi (SDP) 3.8% Nobuhito Sendai (Ishin) 0.7% |
| Aomori | 1 | Masami Tanabu | DPJ | Incumbent re-elected | | Masami Tanabu (DPJ) 47.5% Hidenori Nara (LDP – Komeito) 40.4% Hiroaki Takayanagi (JCP) 6.2% Hiroshi Inoue (SDP) 5.9% |
| Iwate | 1 | Motoo Shiina | "Independent Assembly" | Incumbent retired DPJ pickup | Incumbent retired DPJ pickup | Ryo Shuhama (DPJ) 48.5% Yosuke Takahashi (I – LDP, Ind. Ass.) 39.6% Kunihiko Takehana (SDP) 6.7% Akio Wakayama (JCP) 5.2% |
| Miyagi | 2 | Mitsuru Sakurai | DPJ | Incumbents re-elected LDP gains top tōsen | | Ichiro Ichikawa (LDP) 38.4% Mitsuru Sakurai (DPJ) 37.8% Ikuko Endo (JCP) 9.8% Toshiaki Sugawara (I) 8.6% Katsuo Okita (SDP) 5.4% |
| Miyagi | 2 | Ichiro Ichikawa | LDP | Incumbents re-elected LDP gains top tōsen | | Ichiro Ichikawa (LDP) 38.4% Mitsuru Sakurai (DPJ) 37.8% Ikuko Endo (JCP) 9.8% Toshiaki Sugawara (I) 8.6% Katsuo Okita (SDP) 5.4% |
| Akita | 1 | Shigenobu Saito | LDP | Incumbent lost re-election Independent pickup | Incumbent lost re-election Independent pickup | Yoetsu Suzuki (I) 50.2% Shigenobu Saito (LDP) 42.9% Kazunobu Imagawa (JCP) 7.0% |
| Yamagata | 1 | Koichi Kishi | LDP | Incumbent re-elected | | Koichi Kishi (LDP) 46.8% Yasue Funayama (DPJ) 36.8% Masahiro Kimura (SDP) 7.1% Masayuki Sato (JCP) 5.4% |
| Fukushima | 2 | Yūhei Satō | DPJ | Incumbents re-elected | | Yūhei Satō (DPJ) 45.4% Mitsuhide Iwaki (LDP) 41.5% Yumiko Abe (JCP) 13.1% |
| Fukushima | 2 | Mitsuhide Iwaki | LDP | Incumbents re-elected | | Yūhei Satō (DPJ) 45.4% Mitsuhide Iwaki (LDP) 41.5% Yumiko Abe (JCP) 13.1% |
| Eastern and Central Japan |||||||
| Prefecture | Seats up | Incumbents | Party | Result | Result | Candidates (Party – endorsements) Vote share |
| Ibaraki | 2 | Akira Gunji | DPJ | Incumbents re-elected LDP gains top tōsen | | Hiroshi Okada (LDP) 50.5% Akira Gunji (LDP) 41.3% Takeo Taya (JCP) 8.2% |
| Ibaraki | 2 | Hiroshi Okada | LDP | Incumbents re-elected LDP gains top tōsen | | Hiroshi Okada (LDP) 50.5% Akira Gunji (LDP) 41.3% Takeo Taya (JCP) 8.2% |
| Tochigi | 2 | Susumu Yanase | DPJ | Incumbents re-elected | | Susumu Yanase (DPJ) 49.2% Tetsuro Yano (LDP) 42.1% Setsuko Nomura (JCP) 8.7% |
| Tochigi | 2 | Tetsuro Yano | LDP | Incumbents re-elected | | Susumu Yanase (DPJ) 49.2% Tetsuro Yano (LDP) 42.1% Setsuko Nomura (JCP) 8.7% |
| Gunma | 2 | Hirofumi Nakasone | LDP | LDP incumbent re-elected LDP incumbent lost re-election DPJ pickup DPJ gains top tōsen | | Yukio Tomioka (DPJ) 34.5% Hirofumi Nakasone (LDP) 30.3% Kosei Ueno (LDP) 29.4% Shinmei Ogasawara (JCP) 5.8% |
| Gunma | 2 | Kosei Ueno | LDP | LDP incumbent re-elected LDP incumbent lost re-election DPJ pickup DPJ gains top tōsen | | Yukio Tomioka (DPJ) 34.5% Hirofumi Nakasone (LDP) 30.3% Kosei Ueno (LDP) 29.4% Shinmei Ogasawara (JCP) 5.8% |
| Saitama | 3 | Masakazu Sekiguchi | LDP | LDP incumbent re-elected DPJ and JCP incumbents retired DPJ hold Komeito pickup DPJ gains top tōsen | | Chiyako Shimada (DPJ) 28.4% Masakazu Sekiguchi (LDP) 24.8% Makoto Nishida (Komeito) 18.6% Hayato Yuge (DPJ) 12.8% Sachiyo Abe (JCP) 11.9% Fumihiro Himori (SDP) 3.4% |
| Saitama | 3 | Renzō Togashi | JCP | LDP incumbent re-elected DPJ and JCP incumbents retired DPJ hold Komeito pickup DPJ gains top tōsen | | Chiyako Shimada (DPJ) 28.4% Masakazu Sekiguchi (LDP) 24.8% Makoto Nishida (Komeito) 18.6% Hayato Yuge (DPJ) 12.8% Sachiyo Abe (JCP) 11.9% Fumihiro Himori (SDP) 3.4% |
| Saitama | 3 | Toshio Fujii | DPJ | LDP incumbent re-elected DPJ and JCP incumbents retired DPJ hold Komeito pickup DPJ gains top tōsen | | Chiyako Shimada (DPJ) 28.4% Masakazu Sekiguchi (LDP) 24.8% Makoto Nishida (Komeito) 18.6% Hayato Yuge (DPJ) 12.8% Sachiyo Abe (JCP) 11.9% Fumihiro Himori (SDP) 3.4% |
| Chiba | 2 | Wakako Hironaka | DPJ | Incumbents re-elected | | Wakako Hironaka (DPJ) 49.1% Kazuyasu Shiina (LDP) 39.0% Fumiko Asano (JCP) 11.9% |
| Chiba | 2 | Kazuyasu Shiina | LDP | Incumbents re-elected | | Wakako Hironaka (DPJ) 49.1% Kazuyasu Shiina (LDP) 39.0% Fumiko Asano (JCP) 11.9% |
| Tokyo | 4 | Toshio Ogawa | DPJ | Komeito, JCP and Green incumbents retired LDP pickup LDP gains top tōsen | | Masaharu Nakagawa (LDP) 18.3% Toshio Ogawa (DPJ) 17.9% Renhō (DPJ) 16.7% Yūji Sawa (Komeito) 14.9% Yukio Aoshima (I) 10.7% Junichiro Imamura (JCP) 8.2% Teruaki Masumoto (I) 6.9% Naoto Nakagawa (SDP) 3.2% Tetsu Ueda (I) 3.0% Hisayoshi Matsumura (Ishin) 0.2% Mitsuo Matayoshi (WECP) 0.2% |
| Tokyo | 4 | Toshiko Hamayotsu | Komeito | Komeito, JCP and Green incumbents retired LDP pickup LDP gains top tōsen | | Masaharu Nakagawa (LDP) 18.3% Toshio Ogawa (DPJ) 17.9% Renhō (DPJ) 16.7% Yūji Sawa (Komeito) 14.9% Yukio Aoshima (I) 10.7% Junichiro Imamura (JCP) 8.2% Teruaki Masumoto (I) 6.9% Naoto Nakagawa (SDP) 3.2% Tetsu Ueda (I) 3.0% Hisayoshi Matsumura (Ishin) 0.2% Mitsuo Matayoshi (WECP) 0.2% |
| Tokyo | 4 | Miyo Inoue | JCP | DPJ incumbent re-elected Komeito hold DPJ pickup | | Masaharu Nakagawa (LDP) 18.3% Toshio Ogawa (DPJ) 17.9% Renhō (DPJ) 16.7% Yūji Sawa (Komeito) 14.9% Yukio Aoshima (I) 10.7% Junichiro Imamura (JCP) 8.2% Teruaki Masumoto (I) 6.9% Naoto Nakagawa (SDP) 3.2% Tetsu Ueda (I) 3.0% Hisayoshi Matsumura (Ishin) 0.2% Mitsuo Matayoshi (WECP) 0.2% |
| Tokyo | 4 | Atsuo Nakamura | "Green Conference" | DPJ incumbent re-elected Komeito hold DPJ pickup | | Masaharu Nakagawa (LDP) 18.3% Toshio Ogawa (DPJ) 17.9% Renhō (DPJ) 16.7% Yūji Sawa (Komeito) 14.9% Yukio Aoshima (I) 10.7% Junichiro Imamura (JCP) 8.2% Teruaki Masumoto (I) 6.9% Naoto Nakagawa (SDP) 3.2% Tetsu Ueda (I) 3.0% Hisayoshi Matsumura (Ishin) 0.2% Mitsuo Matayoshi (WECP) 0.2% |
| Kanagawa | 3 | Keiichirō Asao | DPJ | DPJ incumbents re-elected JCP incumbent lost re-election LDP pickup LDP gains top tōsen | | Akio Koizumi (LDP) 33.2% Keiichirō Asao (DPJ) 23.4% Keiko Chiba (DPJ) 23.0% Kimie Hatano (JCP) 10.9% Keiko Ueda (SDP) 7.0% Hajime Manabe (I) 1.9% Isao Kawakubo (Ishin) 0.6% |
| Kanagawa | 3 | Kimie Hatano | JCP | DPJ incumbents re-elected JCP incumbent lost re-election LDP pickup LDP gains top tōsen | | Akio Koizumi (LDP) 33.2% Keiichirō Asao (DPJ) 23.4% Keiko Chiba (DPJ) 23.0% Kimie Hatano (JCP) 10.9% Keiko Ueda (SDP) 7.0% Hajime Manabe (I) 1.9% Isao Kawakubo (Ishin) 0.6% |
| Kanagawa | 3 | Keiko Chiba | DPJ | DPJ incumbents re-elected JCP incumbent lost re-election LDP pickup LDP gains top tōsen | | Akio Koizumi (LDP) 33.2% Keiichirō Asao (DPJ) 23.4% Keiko Chiba (DPJ) 23.0% Kimie Hatano (JCP) 10.9% Keiko Ueda (SDP) 7.0% Hajime Manabe (I) 1.9% Isao Kawakubo (Ishin) 0.6% |
| Niigata | 2 | Naoki Tanaka | LDP | LDP incumbent re-elected SDP incumbent retired SDP hold SDP gains top tōsen | | Masamichi Kondō (I – DPJ, SDP) 34.9% Naoki Tanaka (LDP) 29.9% Ichirō Tsukada (LDP) 26.1% Kayoko Kuwahara (JCP) 9.1% |
| Niigata | 2 | Kinuko Ōbuchi | SDP | LDP incumbent re-elected SDP incumbent retired SDP hold SDP gains top tōsen | | Masamichi Kondō (I – DPJ, SDP) 34.9% Naoki Tanaka (LDP) 29.9% Ichirō Tsukada (LDP) 26.1% Kayoko Kuwahara (JCP) 9.1% |
| Toyama | 1 | Masaaki Tanibayashi | DPJ | Incumbent lost re-election LDP pickup | Incumbent lost re-election LDP pickup | Tsunenori Kawai (LDP) 46.3% Masaaki Tanibayashi (DPJ) 37.2% Akira Ogawa (SDP) 11.3% Toshihiko Ueda (JCP) 5.2% |
| Ishikawa | 1 | Sōta Iwamoto | "Independent Assembly" | Incumbent retired LDP pickup | Incumbent retired LDP pickup | Naoki Okada (LDP) 56.1% Takashi Katō (DPJ) 36.6% Masayuki Satō (JCP) 7.3% |
| Fukui | 1 | Masaaki Yamazaki | LDP | Incumbent re-elected | | Masaaki Yamazaki (LDP) 56.0% Makiko Isokawa (DPJ) 37.7% Kunihiro Uno (JCP) 6.2% |
| Yamanashi | 1 | Azuma Koshiishi | DPJ | Incumbent re-elected | | Azuma Koshiishi (DPJ) 55.1% Kenshi Ōshiba (I) 37.1% Hitoshi Hanada (JCP) 7.8% |
| Nagano | 2 | Toshimi Kitazawa | DPJ | Incumbents re-elected | | Toshimi Kitazawa (DPJ) 40.9% Masatoshi Wakabayashi (LDP) 27.2% Norihisa Yamaguchi (JCP) 11.5% Wakako Yamaguchi (SDP) 10.4% Roppei Hori (I) 9.9% |
| Nagano | 2 | Masatoshi Wakabayashi | LDP | Incumbents re-elected | | Toshimi Kitazawa (DPJ) 40.9% Masatoshi Wakabayashi (LDP) 27.2% Norihisa Yamaguchi (JCP) 11.5% Wakako Yamaguchi (SDP) 10.4% Roppei Hori (I) 9.9% |
| Gifu | 2 | Iwao Matsuda | LDP | Incumbents re-elected | | Iwao Matsuda (LDP) 44.5% Yasuo Yamashita (DPJ) 43.8% Takao Katō (JCP) 11.7% |
| Gifu | 2 | Yasuo Yamashita | DPJ | Incumbents re-elected | | Iwao Matsuda (LDP) 44.5% Yasuo Yamashita (DPJ) 43.8% Takao Katō (JCP) 11.7% |
| Shizuoka | 2 | Tōru Ueno | DPJ | Incumbents lost re-election LDP and DPJ hold LDP gains top tōsen | | Yukiko Sakamoto (LDP) 29.3% Yūji Fujimoto (DPJ) 21.6% Tōru Ueno (DPJ) 21.2% Yoshihiko Yamashita (LDP) 20.1% Yukihiro Shimazu (JCP) 7.8% |
| Shizuoka | 2 | Yoshihiko Yamashita | LDP | Incumbents lost re-election LDP and DPJ hold LDP gains top tōsen | | Yukiko Sakamoto (LDP) 29.3% Yūji Fujimoto (DPJ) 21.6% Tōru Ueno (DPJ) 21.2% Yoshihiko Yamashita (LDP) 20.1% Yukihiro Shimazu (JCP) 7.8% |
| Aichi | 3 | Yoshitake Kimata | DPJ | DPJ incumbents re-elected JCP incumbent lost re-election LDP pickup LDP gains top tōsen | | Katsuhito Asano (LDP) 28.2% Taisuke Satō (DPJ) 25.4% Yoshitake Kimata (DPJ) 23.0% Hiroko Hatta (JCP) 14.3% Yasuo Koida (I) 6.1% Kenji Sasaki (I) 2.4% Yoshifumi Hayashida (Ishin) 0.7% |
| Aichi | 3 | Taisuke Satō | DPJ | DPJ incumbents re-elected JCP incumbent lost re-election LDP pickup LDP gains top tōsen | | Katsuhito Asano (LDP) 28.2% Taisuke Satō (DPJ) 25.4% Yoshitake Kimata (DPJ) 23.0% Hiroko Hatta (JCP) 14.3% Yasuo Koida (I) 6.1% Kenji Sasaki (I) 2.4% Yoshifumi Hayashida (Ishin) 0.7% |
| Aichi | 3 | Hiroko Hatta | JCP | DPJ incumbents re-elected JCP incumbent lost re-election LDP pickup LDP gains top tōsen | | Katsuhito Asano (LDP) 28.2% Taisuke Satō (DPJ) 25.4% Yoshitake Kimata (DPJ) 23.0% Hiroko Hatta (JCP) 14.3% Yasuo Koida (I) 6.1% Kenji Sasaki (I) 2.4% Yoshifumi Hayashida (Ishin) 0.7% |
| Mie | 1 | Jūrō Saitō | LDP | Incumbent retired DPJ pickup | Incumbent retired DPJ pickup | Hirokazu Shiba (DPJ) 52.1% Kenji Tsuda (LDP) 41.0% Takeshi Nakano (JCP) 6.8% |
| Western Japan |||||||
| Prefecture | Seats up | Incumbents | Party | Result | Result | Candidates (Party – endorsements) Vote share |
| Shiga | 1 | Eisuke Kawamoto | LDP | Incumbent retired DPJ pickup | Incumbent retired DPJ pickup | Kumiko Hayashi (DPJ) 48.0% Kenichiro Ueno (LDP) 41.5% Toshirō Hayashi (JCP) 10.5% |
| Kyoto | 2 | Tetsurō Fukuyama | DPJ | DPJ incumbent re-elected JCP incumbent lost re-election LDP pickup | | Tetsurō Fukuyama (DPJ) 43.8% Satoshi Ninoyu (LDP) 32.4% Tokiko Nishiyama (JCP) 23.8% |
| Kyoto | 2 | Tokiko Nishiyama | JCP | DPJ incumbent re-elected JCP incumbent lost re-election LDP pickup | | Tetsurō Fukuyama (DPJ) 43.8% Satoshi Ninoyu (LDP) 32.4% Tokiko Nishiyama (JCP) 23.8% |
| Ōsaka | 3 | Kiyoshi Nishikawa | Dainiin Club | Komeito incumbent re-elected Dainiin incumbent retired JCP incumbent lost reelection DPJ pickup | | Motoyuki Odachi (DPJ) 24.9% Eiichi Yamashita (Komeito) 21.8% Issei Kitagawa (LDP) 20.1% Kiyomi Tsujimoto (I) 19.7% Takeshi Miyamoto (JCP) 12.1% Yoshio Masuda (I) 1.0% Toyokazu Ōkido (Ishin) 0.4% |
| Ōsaka | 3 | Eiichi Yamashita | Komeito | Komeito incumbent re-elected Dainiin incumbent retired JCP incumbent lost reelection DPJ pickup | | Motoyuki Odachi (DPJ) 24.9% Eiichi Yamashita (Komeito) 21.8% Issei Kitagawa (LDP) 20.1% Kiyomi Tsujimoto (I) 19.7% Takeshi Miyamoto (JCP) 12.1% Yoshio Masuda (I) 1.0% Toyokazu Ōkido (Ishin) 0.4% |
| Ōsaka | 3 | Takeshi Miyamoto | JCP | LDP pickup DPJ gains top tōsen | LDP pickup DPJ gains top tōsen | | Motoyuki Odachi (DPJ) 24.9% Eiichi Yamashita (Komeito) 21.8% Issei Kitagawa (LDP) 20.1% Kiyomi Tsujimoto (I) 19.7% Takeshi Miyamoto (JCP) 12.1% Yoshio Masuda (I) 1.0% Toyokazu Ōkido (Ishin) 0.4% |
| Hyogo | 2 | Shōji Motooka | DPJ | DPJ incumbent retired JCP incumbent lost re-election DPJ hold LDP pickup | | Shunichi Mizuoka (DPJ) 38.6% Shinsuke Suematsu (LDP) 33.5% Tatsumi Ōsawa (JCP) 14.0% Kazumi Hara (I) 7.3% Ichizō Miyamoto (I) 4.7% Kōjin Katakami (I) 1.9% |
| Hyogo | 2 | Tatsumi Ōsawa | JCP | DPJ incumbent retired JCP incumbent lost re-election DPJ hold LDP pickup | | Shunichi Mizuoka (DPJ) 38.6% Shinsuke Suematsu (LDP) 33.5% Tatsumi Ōsawa (JCP) 14.0% Kazumi Hara (I) 7.3% Ichizō Miyamoto (I) 4.7% Kōjin Katakami (I) 1.9% |
| Nara | 1 | Minao Hattori | LDP | Incumbent lost re-election DPJ pickup | Incumbent lost re-election DPJ pickup | Kiyoshige Maekawa (DPJ) 48.9% Minao Hattori (LDP) 41.1% Yoshinori Mameda (JCP) 10.0% |
| Wakayama | 1 | Yōsuke Tsuruho | LDP | Incumbent re-elected | | Yōsuke Tsuruho (LDP) 53.8% Shika Kawajō (DPJ) 35.1% Hideaki Kunishige (JCP) 9.9% Yoshiya Seki (Ishin) 1.2% |
| Tottori | 1 | Kōtarō Tamura | LDP | Incumbent re-elected | | Kōtarō Tamura (LDP) 49.7% Masahide Tsuchiya (DPJ) 37.6% Tomoko Ichitani (JCP) 12.7% |
| Shimane | 1 | Mikio Aoki | LDP | Incumbent re-elected | | Mikio Aoki (LDP) 62.1% Itaru Gōdo (DPJ) 30.3% Katsuhiko Gotō (JCP) 7.5% |
| Okayama | 1 | Satsuki Eda | DPJ | 1 seat lost by reapportionment DPJ incumbent re-elected LDP incumbent lost re-election | | Satsuki Eda (DPJ) 55.7% Norifumi Katō (LDP) 39.0% Kanji Uemoto (JCP) 5.3% |
| Okayama | 1 | Norifumi Katō | LDP | 1 seat lost by reapportionment DPJ incumbent re-elected LDP incumbent lost re-election | | Satsuki Eda (DPJ) 55.7% Norifumi Katō (LDP) 39.0% Kanji Uemoto (JCP) 5.3% |
| Hiroshima | 2 | Ikuo Kamei | LDP | Incumbents re-elected DPJ gains top tōsen | | Minoru Yanagida (DPJ) 42.6% Ikuo Kamei (LDP) 41.3% Mitsuo Okamoto (I) 9.1% Satoshi Fujimoto (JCP) 7.1% |
| Hiroshima | 2 | Minoru Yanagida | DPJ | Incumbents re-elected DPJ gains top tōsen | | Minoru Yanagida (DPJ) 42.6% Ikuo Kamei (LDP) 41.3% Mitsuo Okamoto (I) 9.1% Satoshi Fujimoto (JCP) 7.1% |
| Yamaguchi | 1 | Masuo Matsuoka | DPJ | Incumbent retired LDP pickup | Incumbent retired LDP pickup | Nobuo Kishi (LDP) 49.1% Hiroko Ōizumi (DPJ) 41.9% Sadayoshi Yoshida (JCP) 6.0% Shigeo Hiramatsu (I) 1.8% Seiichirō Hirata (Ishin) 1.1% |
| Tokushima | 1 | Sekiko Takahashi | "Green Conference" | Incumbent retired LDP pickup | Incumbent retired LDP pickup | Masakatsu Koike (LDP) 47.1% Kyōko Tōjō (DPJ) 43.3% Takayuki Kubo (JCP) 9.6% |
| Kagawa | 1 | Toshio Yamauchi | LDP | Incumbent re-elected | | Toshio Yamauchi (LDP) 46.6% Emiko Uematsu (DPJ) 45.0% Michiko Chikaishi (JCP) 8.3% |
| Ehime | 1 | Takeshi Noma | LDP | Incumbent retired LDP hold | | Junzō Yamamoto (LDP) 49.4% Masamitsu Saitō (DPJ) 42.0% Masahiro Sakane (JCP) 8.6% |
| Kōchi | 1 | Hiroyuki Morishita | LDP | Incumbent lost re-election Independent pickup | Incumbent lost re-election Independent pickup | Hajime Hirota (I) 43.6% Hiroyuki Morishita (LDP) 35.7% Sachi Nakane (JCP) 14.3% Yumiko Matsuoka (I) 6.4% |
| Southern Japan |||||||
| Prefecture | Seats up | Incumbents | Party | Result | Result | Candidates (Party – endorsements) Vote share |
| Fukuoka | 2 | Kazuo Hirotomo | Komeito | Komeito incumbent retired LDP incumbent re-elected DPJ pickup DPJ gains top tōsen | | Tsutomu Ōkubo (DPJ) 40.6% Gōtarō Yoshimura (LDP) 30.7% Chū Furukawa (I) 12.5% Toyoomi Tsuno (JCP) 8.8% Kunihiro Etō (I) 4.7% Yutaka Fujimoto (I) 1.8% Tomotada Ishihara (Ishin) 0.9% |
| Fukuoka | 2 | Gōtarō Yoshimura | LDP | Komeito incumbent retired LDP incumbent re-elected DPJ pickup DPJ gains top tōsen | | Tsutomu Ōkubo (DPJ) 40.6% Gōtarō Yoshimura (LDP) 30.7% Chū Furukawa (I) 12.5% Toyoomi Tsuno (JCP) 8.8% Kunihiro Etō (I) 4.7% Yutaka Fujimoto (I) 1.8% Tomotada Ishihara (Ishin) 0.9% |
| Saga | 1 | Hiromi Iwanaga | LDP | Incumbent re-elected | | Hiromi Iwanaga (LDP) 47.7% Minoru Kawasaki (DPJ) 42.9% Akemi Mutō (JCP) 9.5% |
| Nagasaki | 1 | Sōichirō Matsutani | LDP | Incumbent lost re-election DPJ pickup | Incumbent lost re-election DPJ pickup | Tadashi Inuzuka (DPJ) 49.5% Sōichirō Matsutani (LDP) 43.6% Toshihiro Haraguchi (JCP) 6.8% |
| Kumamoto | 1 | Ryōichi Honda | DPJ | 1 seat lost by reapportionment LDP incumbent re-elected DPJ incumbent lost re-election | | Hitoshi Kimura (LDP) 48.9% Ryōichi Honda (DPJ) 44.3% Nobuhiro Yamamoto (JCP) 6.8% |
| Kumamoto | 1 | Hitoshi Kimura | LDP | 1 seat lost by reapportionment LDP incumbent re-elected DPJ incumbent lost re-election | | Hitoshi Kimura (LDP) 48.9% Ryōichi Honda (DPJ) 44.3% Nobuhiro Yamamoto (JCP) 6.8% |
| Oita | 1 | Toshiya Nakamichi | LDP | Incumbent lost re-election DPJ pickup | Incumbent lost re-election DPJ pickup | Shinya Adachi (DPJ) 54.8% Toshiya Nakamichi (LDP) 38.7% Masaru Ono (JCP) 4.6% Kunio Fujiki 1.9% |
| Miyazaki | 1 | Mitsuhiro Uesugi | LDP | Incumbent lost re-election Independent pickup | Incumbent lost re-election Independent pickup | Shinpei Matsushita (I) 48.5% Mitsuhiro Uesugi (LDP) 45.6% Hiromitsu Baba (JCP) 5.9% |
| Kagoshima | 1 | Hiroshi Moriyama | LDP | 1 seat lost by reapportionment Incumbent retired LDP hold | | Tetsurō Nomura (LDP) 53.2% Inao Minayoshi (DPJ) 36.9% Katsuko Iwaizako (JCP) 9.9% |
| Tetsurō Nomura (LDP) 53.2% Inao Minayoshi (DPJ) 36.9% Katsuko Iwaizako (JCP) 9.9% ||
| Okinawa | 1 | Sōkō Shimabuku | "Independent Assembly" | Incumbent retired Independent (OSMP) pickup | Incumbent retired Independent (OSMP) pickup | Keiko Itokazu (I) 58.9% Masatoshi Onaga (LDP) 41.1% |