# 2010 Japanese House of Councillors election

House of Councillors elections were held in Japan on July 11, 2010. In the previous elections in 2007 the Liberal Democratic Party (LDP) had lost its majority to the Democratic Party (DPJ), which managed to gain the largest margin since its formation in 1996. The House of Councillors is elected by halves to six-year terms. The seats up for election in 2010 were last contested in the 2004 election.

## Background

On 11 June 2008, a non-binding censure motion was passed by parliament's opposition-controlled House of Councillors against then Prime Minister Yasuo Fukuda. Filed by the DPJ and two other parties, it was the first censure motion against a prime minister under Japan's post-war constitution. Ahead of the G8 summit, it attacked his handling of domestic issues including an unpopular medical plan and called for a snap election or his resignation. On 12 June a motion of confidence was passed by the lower house's ruling coalition to counter the censure. Fukuda abruptly announced he was retiring as leader. Taro Aso won the subsequent election, which was held on 22 September 2008.
In the 2009 lower house election, the DPJ gained an historic majority, being the first non-LDP party to hold a majority in that house since the LDP's formation and is scheduled to lead the second non-LDP government in the aforementioned time period (with upper house allies the Social Democratic Party of Japan and the People's New Party). Following the election, Aso resigned as LDP president. Sadakazu Tanigaki was elected the leader of LDP on September 28, 2009.
The House of Councillors election in 2010 was viewed as potentially leading to the extinction of the LDP. Some of the LDP's most popular councillors, such as Yoichi Masuzoe and Kaoru Yosano, left the party prior to the election. However, the DPJ's popularity had been negatively impacted by fundraising scandals surrounding its president Yukio Hatoyama and secretary general Ichiro Ozawa, both of whom resigned on June 2, 2010. Naoto Kan became prime minister after Hatoyama's resignation and proposed a controversial increase in the consumption tax to shore up Japanese public finances. The campaign season was only three weeks long, which frustrated efforts to have policy debates between the two major parties and the numerous third parties in the election.

### Pre-election composition

| 66 | 44 | 7 | 9 | 10 | 51 | 55 |
| Coalition seats not up | DPJ seats up | O | NK | YP | LDP seats up | Opposition seats not up |

## Results

The result of the election was declared on July 12, 2010. The ruling DPJ lost many of its seats and the opposition LDP gained more seats in comparison to the last election, held in 2007. Your Party performed well in this election, while the DPJ's junior coalition partner, the People's New Party, performed poorly.
Seats :
| Party | Party | Votes | % | Seats | Votes | % | Seats | Not up | Won | Total after | +/– |
| | Democratic Party of Japan | 18,450,139 | 31.56 | 16 | 22,756,000 | 38.97 | 28 | 62 | 44 | 106 | –3 |
| | Liberal Democratic Party | 14,071,671 | 24.07 | 12 | 19,496,083 | 33.38 | 39 | 33 | 51 | 84 | +1 |
| | Your Party | 7,943,649 | 13.59 | 7 | 5,977,391 | 10.24 | 3 | 1 | 10 | 11 | New |
| | New Komeito Party | 7,639,433 | 13.07 | 6 | 2,265,818 | 3.88 | 3 | 10 | 9 | 19 | –1 |
| | Japanese Communist Party | 3,563,557 | 6.10 | 3 | 4,256,400 | 7.29 | 0 | 3 | 3 | 6 | –1 |
| | Social Democratic Party | 2,242,735 | 3.84 | 2 | 602,684 | 1.03 | 0 | 2 | 2 | 4 | –1 |
| | Sunrise Party | 1,232,207 | 2.11 | 1 | 328,475 | 0.56 | 0 | 2 | 1 | 3 | New |
| | New Renaissance Party | 1,172,395 | 2.01 | 1 | 625,431 | 1.07 | 0 | 1 | 1 | 2 | New |
| | People's New Party | 1,000,036 | 1.71 | 0 | 167,555 | 0.29 | 0 | 3 | 0 | 3 | –1 |
| | Happiness Realization Party | 229,026 | 0.39 | 0 | 291,810 | 0.50 | 0 | 1 | 0 | 1 | New |
| | Spirit of Japan Party | 493,620 | 0.84 | 0 | 296,697 | 0.51 | 0 | 0 | 0 | 0 | New |
| | Women's Party | 414,963 | 0.71 | 0 | | | | 0 | 0 | 0 | 0 |
| | Other parties | | | | 22,150 | 0.04 | 0 | 0 | 0 | 0 | – |
| | Independents | | | | 1,314,313 | 2.25 | 0 | 3 | 0 | 3 | –9 |
| Total | Total | 58,453,431 | 100.00 | 48 | 58,400,807 | 100.00 | 73 | 121 | 121 | 242 | 0 |
| Valid votes | Valid votes | 58,453,996 | 97.02 | | 58,400,808 | 96.92 | | | | | |
| Invalid/blank votes | Invalid/blank votes | 1,793,766 | 2.98 | | 1,853,292 | 3.08 | | | | | |
| Total votes | Total votes | 60,247,762 | 100.00 | | 60,254,100 | 100.00 | | | | | |
| Registered voters/turnout | Registered voters/turnout | 104,029,135 | 57.91 | | 104,029,135 | 57.92 | | | | | |
| Source: Ministry of Internal Affairs and Communications, National Diet ||||||||||||

### DPJ nomination strategy in multi-member districts

DPJ secretary-general Ichirō Ozawa had decided on an offensive strategy for nominating candidates in multi-member districts (MMDs): The DPJ was to nominate two candidates in all MMDs with the exceptions of Niigata where an SDP-affiliated independent incumbent was in the race and Fukuoka where a PNP incumbent sought reelection. This strategy was reaffirmed after Ozawa's resignation in June 2010 even though the DPJ's support rate had significantly fallen by then and winning both seats in a SNTV two-member district requires a very high margin in terms of party votes and an equal distribution of votes on the two candidates.
The strategy failed: all two-member districts split seats evenly between DPJ and LDP in 2010. In some districts the party even risked losing both seats due to vote splitting, a danger that did not materialize in the election result.
The LDP on the other hand nominated only one candidate per MMD – exceptions being Miyagi, Chiba and Tokyo –, thus concentrating all LDP votes on one candidate.
The election results in MMDs gave 20 seats to the DPJ, 18 to the LDP, three to the Kōmeitō and three to Your Party. The only districts where the DPJ won two seats and an advantage in seats over the LDP were Tokyo (5 seats) where administrative reform minister Renhō received a record 1.7 million votes and Toshio Ogawa ranked fourth and DPJ stronghold Aichi (3 seats) where DPJ candidates only finished second and third behind LDP newcomer Masahito Fujikawa.

### LDP gains

Part of the LDP victory were the results in the 29 single-member districts where the DPJ received roughly 7 million votes winning eight districts while the LDP received 8.25 million votes and 21 seats, among them seven pickups compared to the pre-election composition of the chamber:
* Aomori, Akita, Tottori and Nagasaki from the DPJ
* Kagawa and Tokushima from the NRP, both from former LDP members, and
* Tochigi which had been a two-member district until 2010 with seats held by DPJ and NRP.
The LDP also gained seven additional seats in two-member districts, but exclusively seats it had previously lost by party switchovers or resignations:
* in Hokkaidō from the Sunrise Party,
* in Niigata where Naoki Tanaka had switched parties together with his wife Makiko from an SDP-affiliated independent,
* in Gifu from an ex-LDP independent,
* in Nagano a vacant seat previously held by the LDP,
* in Hiroshima and Fukuoka from the PNP and
* only in Shizuoka directly from the DPJ where the Democrats had held both seats up because of the resignation of Yukiko Sakamoto in 2009 and the DPJ's victory in the resulting by-election.
The vote in the districts with three (Saitama, Chiba, Kanagawa, Aichi, Ōsaka) or five (Tōkyō) seats up went clearly to the DPJ with a 3.5 million vote edge over the LDP, but produced only a two-seat difference in the House of Councillors: the LDP won six, the DPJ eight seats.
If compared to the 2004 election when the same class of Councillors was last elected, the LDP only gained five prefectural district seats and lost three seats in the nationwide proportional representation.

### By prefecture

Elected candidates in bold
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
* Miyagi is counted as an LDP hold because Ichikawa was an LDP member and remained with the LDP parliamentary group up to the election. He ran as an independent after failing to gain the party's official nomination in Miyagi.
Northern Japan :
| Prefecture | Seats up | Incumbents | Party | Result | Candidates (Party – endorsements) Vote share |
| Hokkaidō | 2 | Yoshio Nakagawa | Sunrise | Incumbents retired Democratic hold Liberal Democratic pickup | Gaku Hasegawa (LDP) 34.3% Eri Tokunaga (DPJ – PNP, NPD) 25.6% Masahi Fujikawa (DPJ) 20.5% Ken'ichi Nakagawa (YP) 11.6% Kazuya Hatayama (JCP) 7.2% Makoto Ōbayashi (HRP) 0.8% |
| Hokkaidō | 2 | Naoki Minezaki | Democratic | Incumbents retired Democratic hold Liberal Democratic pickup | Gaku Hasegawa (LDP) 34.3% Eri Tokunaga (DPJ – PNP, NPD) 25.6% Masahi Fujikawa (DPJ) 20.5% Ken'ichi Nakagawa (YP) 11.6% Kazuya Hatayama (JCP) 7.2% Makoto Ōbayashi (HRP) 0.8% |
| Aomori | 1 | Masami Tanabu | Democratic | Incumbent retired Liberal Democratic pickup | Tsutomu Yamazaki (LDP) 46.8% Rina Hatano (DPJ – PNP) 36.3% Sekio Masuta (SPJ) 8.0% Yō Yoshimata (JCP) 5.1% Kiyohiko Yamada (SDP) 3.9% |
| Iwate | 1 | Ryō Shuhama | Democratic | Incumbent re-elected | Ryō Shuhama (DPJ – PNP) 54.2% Yukifumi Takahashi (LDP) 30.4% Masahiro Isawa (SDP) 8.5% Sadakiyo Segawa (JCP) 6.9% |
| Miyagi | 2 | Ichirō Ichikawa | Liberal Democratic (see note) | Liberal Democratic incumbent lost re-election Democratic incumbent re-elected Liberal Democratic hold | Yutaka Kumagai (LDP) 26.8% Mitsuru Sakurai (DPJ – PNP) 24.4% Hiromi Itō (DPJ – PNP) 16.5% Ichirō Ichikawa (I) 11.0% Fumihiro Kikuchi (YP) 10.8% Tetsuo Kanno (SDP) 5.2% Mikio Katō (JCP) 4.5% Yoshiaki Murakami (HRP) 0.7% |
| Miyagi | 2 | Mitsuru Sakurai | Democratic | Liberal Democratic incumbent lost re-election Democratic incumbent re-elected Liberal Democratic hold | Yutaka Kumagai (LDP) 26.8% Mitsuru Sakurai (DPJ – PNP) 24.4% Hiromi Itō (DPJ – PNP) 16.5% Ichirō Ichikawa (I) 11.0% Fumihiro Kikuchi (YP) 10.8% Tetsuo Kanno (SDP) 5.2% Mikio Katō (JCP) 4.5% Yoshiaki Murakami (HRP) 0.7% |
| Akita | 1 | Yōetsu Suzuki | Democratic | Incumbent lost re-election Liberal Democratic pickup | Hiroo Ishii (LDP) 55.6% Yōetsu Suzuki (DPJ) 38.3% Kazuhisa Fujita (JCP) 6.1% |
| Yamagata | 1 | Kōichi Kishi | Liberal Democratic | Incumbent re-elected | Kōichi Kishi (LDP) 43.6% Yōsei Umetsu (DPJ) 36.8% Hiroaki Kawano (YP) 14.6% Toshio Ōta (JCP) 5.0% |
| Fukushima | 2 | Teruhiko Mashiko | Democratic | Incumbents re-elected | Teruhiko Mashiko (DPJ) 34.4% Mitsuhide Iwaki (LDP) 34.1% Mitsunori Okabe (DPJ) 15.6% Kazumasa Sugamoto (YP) 9.4% Tomo Iwabuchi (JCP) 6.5% |
| Fukushima | 2 | Mitsuhide Iwaki | Liberal Democratic | Incumbents re-elected | Teruhiko Mashiko (DPJ) 34.4% Mitsuhide Iwaki (LDP) 34.1% Mitsunori Okabe (DPJ) 15.6% Kazumasa Sugamoto (YP) 9.4% Tomo Iwabuchi (JCP) 6.5% |
| Eastern and Central Japan ||||||
| Prefecture | Seats up | Incumbents | Party | Result | Candidates (Party – endorsements) Vote share |
| Ibaraki | 2 | Hiroshi Okada | Liberal Democratic | Incumbents re-elected | Hiroshi Okada (LDP) 38.7% Akira Gunji (DPJ) 23.8% Tomohiro Nagatsuka (DPJ) 15.9% Shigenori Ōkawa (YP) 11.7% Rie Yoshida (SPJ) 5.1% Nobutoshi Inaba (JCP) 3.9% Kōki Nakamura (HRP) 0.9% |
| Ibaraki | 2 | Akira Gunji | Democratic | Incumbents re-elected | Hiroshi Okada (LDP) 38.7% Akira Gunji (DPJ) 23.8% Tomohiro Nagatsuka (DPJ) 15.9% Shigenori Ōkawa (YP) 11.7% Rie Yoshida (SPJ) 5.1% Nobutoshi Inaba (JCP) 3.9% Kōki Nakamura (HRP) 0.9% |
| Tochigi | 1 | Susumu Yanase | Democratic | 1 seat lost by reapportionment New Renaissance incumbent retired Democratic incumbent lost re-election Liberal Democratic pickup | Michiko Ueno (LDP) 36.2% Susumu Yanase (DPJ – PNP) 35.6% Daiju Araki (YP) 25.0% Kazunori Koike (JCP) 3.2% |
| Tochigi | 1 | Tetsurō Yano | New Renaissance | 1 seat lost by reapportionment New Renaissance incumbent retired Democratic incumbent lost re-election Liberal Democratic pickup | Michiko Ueno (LDP) 36.2% Susumu Yanase (DPJ – PNP) 35.6% Daiju Araki (YP) 25.0% Kazunori Koike (JCP) 3.2% |
| Gunma | 1 | Yukio Tomioka | Democratic | 1 seat lost by reapportionment Democratic incumbent lost re-election Liberal Democratic incumbent re-elected | Hirofumi Nakasone (LDP) 60.6% Yukio Tomioka (DPJ) 31.2% Setsuko Takahashi (JCP) 8.2% |
| Gunma | 1 | Hirofumi Nakasone | Liberal Democratic | 1 seat lost by reapportionment Democratic incumbent lost re-election Liberal Democratic incumbent re-elected | Hirofumi Nakasone (LDP) 60.6% Yukio Tomioka (DPJ) 31.2% Setsuko Takahashi (JCP) 8.2% |
| Saitama | 3 | Chiyako Shimada | Democratic | Liberal Democratic and Justice incumbents re-elected Democratic incumbent lost re-election Democratic hold | Masukazu Sekiguchi (LDP) 20.6% Makoto Nishida (Kōmei) 18.7% Motohiro Ōno (DPJ) 17.5% Chiyako Shimada (DPJ) 17.1% Tsukasa Kobayashi (YP) 13.1% Gaku Itō (JCP) 6.5% Kōji Nakagawa (NRP) 2.7% Fumihiro Himori (SDP) 2.3% Kōsei Hasegawa (I) 1.2% Hirotoshi Inda (HRP) 0.3% |
| Saitama | 3 | Masakazu Sekiguchi | Liberal Democratic | Liberal Democratic and Justice incumbents re-elected Democratic incumbent lost re-election Democratic hold | Masukazu Sekiguchi (LDP) 20.6% Makoto Nishida (Kōmei) 18.7% Motohiro Ōno (DPJ) 17.5% Chiyako Shimada (DPJ) 17.1% Tsukasa Kobayashi (YP) 13.1% Gaku Itō (JCP) 6.5% Kōji Nakagawa (NRP) 2.7% Fumihiro Himori (SDP) 2.3% Kōsei Hasegawa (I) 1.2% Hirotoshi Inda (HRP) 0.3% |
| Saitama | 3 | Makoto Nishida | Justice | Liberal Democratic and Justice incumbents re-elected Democratic incumbent lost re-election Democratic hold | Masukazu Sekiguchi (LDP) 20.6% Makoto Nishida (Kōmei) 18.7% Motohiro Ōno (DPJ) 17.5% Chiyako Shimada (DPJ) 17.1% Tsukasa Kobayashi (YP) 13.1% Gaku Itō (JCP) 6.5% Kōji Nakagawa (NRP) 2.7% Fumihiro Himori (SDP) 2.3% Kōsei Hasegawa (I) 1.2% Hirotoshi Inda (HRP) 0.3% |
| Chiba | 3 | Wakako Hironaka | Democratic | 1 seat gained by reapportionment Democratic incumbent retired Liberal Democratic incumbent lost re-election Democratic and Liberal Democratic hold Your pickup | Hiroyuki Konishi (LDP) 20.2% Kuniko Inoguchi (DPJ) 19.3% Ken'ichi Mizuno (YP) 17.9% Ayumi Michi (DPJ) 17.4% Kazuyasu Shiina (LDP) 14.9% Kazuko Saitō (JCP) 6.2% Hisashi Koga (NRP) 2.5% Satoshi Shimizu (JIP) 1.1% Masahiko Makino (HRP) 0.5% |
| Chiba | 3 | Kazuyasu Shiina | Liberal Democratic | 1 seat gained by reapportionment Democratic incumbent retired Liberal Democratic incumbent lost re-election Democratic and Liberal Democratic hold Your pickup | Hiroyuki Konishi (LDP) 20.2% Kuniko Inoguchi (DPJ) 19.3% Ken'ichi Mizuno (YP) 17.9% Ayumi Michi (DPJ) 17.4% Kazuyasu Shiina (LDP) 14.9% Kazuko Saitō (JCP) 6.2% Hisashi Koga (NRP) 2.5% Satoshi Shimizu (JIP) 1.1% Masahiko Makino (HRP) 0.5% |
| Tokyo | 5 | Masaharu Nakagawa | Liberal Democratic | 1 seat gained by reapportionment Democratic and Liberal Democratic incumbents re-elected Justice incumbent retired Justice hold Your pickup | Renhō (DPJ) 28.1% Toshiko Takeya (Kōmei) 13.2% Masaharu Nakagawa (LDP) 11.7% Toshio Ogawa (DPJ) 11.4% Kōta Matsuda (YP) 10.8% Akira Koike (JCP) 9.1% Yukiko Tōkai (LDP) 4.9% Hiroshi Yamada (JIP) 3.3% Asako Ogura (SPJ) 2.0% Hideo Morihara (SDP) 1.6% Kōtarō Umiji (NRP) 1.3% Saori Egi (PNP) 0.9% Yūmi Ishihara (I) 0.7% Hiroko Tanaka (I) 0.3 % Hisshō Yanai (HRP) 0.2% 9 other candidates 0.7% |
| Tokyo | 5 | Toshio Ogawa | Democratic | 1 seat gained by reapportionment Democratic and Liberal Democratic incumbents re-elected Justice incumbent retired Justice hold Your pickup | Renhō (DPJ) 28.1% Toshiko Takeya (Kōmei) 13.2% Masaharu Nakagawa (LDP) 11.7% Toshio Ogawa (DPJ) 11.4% Kōta Matsuda (YP) 10.8% Akira Koike (JCP) 9.1% Yukiko Tōkai (LDP) 4.9% Hiroshi Yamada (JIP) 3.3% Asako Ogura (SPJ) 2.0% Hideo Morihara (SDP) 1.6% Kōtarō Umiji (NRP) 1.3% Saori Egi (PNP) 0.9% Yūmi Ishihara (I) 0.7% Hiroko Tanaka (I) 0.3 % Hisshō Yanai (HRP) 0.2% 9 other candidates 0.7% |
| Tokyo | 5 | Renhō Murata | Democratic | 1 seat gained by reapportionment Democratic and Liberal Democratic incumbents re-elected Justice incumbent retired Justice hold Your pickup | Renhō (DPJ) 28.1% Toshiko Takeya (Kōmei) 13.2% Masaharu Nakagawa (LDP) 11.7% Toshio Ogawa (DPJ) 11.4% Kōta Matsuda (YP) 10.8% Akira Koike (JCP) 9.1% Yukiko Tōkai (LDP) 4.9% Hiroshi Yamada (JIP) 3.3% Asako Ogura (SPJ) 2.0% Hideo Morihara (SDP) 1.6% Kōtarō Umiji (NRP) 1.3% Saori Egi (PNP) 0.9% Yūmi Ishihara (I) 0.7% Hiroko Tanaka (I) 0.3 % Hisshō Yanai (HRP) 0.2% 9 other candidates 0.7% |
| Tokyo | 5 | Makoto Nishida | Justice | 1 seat gained by reapportionment Democratic and Liberal Democratic incumbents re-elected Justice incumbent retired Justice hold Your pickup | Renhō (DPJ) 28.1% Toshiko Takeya (Kōmei) 13.2% Masaharu Nakagawa (LDP) 11.7% Toshio Ogawa (DPJ) 11.4% Kōta Matsuda (YP) 10.8% Akira Koike (JCP) 9.1% Yukiko Tōkai (LDP) 4.9% Hiroshi Yamada (JIP) 3.3% Asako Ogura (SPJ) 2.0% Hideo Morihara (SDP) 1.6% Kōtarō Umiji (NRP) 1.3% Saori Egi (PNP) 0.9% Yūmi Ishihara (I) 0.7% Hiroko Tanaka (I) 0.3 % Hisshō Yanai (HRP) 0.2% 9 other candidates 0.7% |
| Kanagawa | 3 | Akio Koizumi | Liberal Democratic | Democratic (1 of 2) and Liberal Democratic incumbents re-elected Democratic (1 of 2) incumbent lost re-election Your pickup | Akio Koizumi (LDP) 25.2% Kenji Nakanishi (YP) 20.2% Yōichi Kaneko (DPJ) 19.2% Keiko Chiba (DPJ) 17.9% Kimie Hatano (JCP) 7.8% Eiko Kimura (SDP) 2.9% Takahiro Kai (NRP) 2.9% Manabu Matsuda (JSP) 2.4% Seiichi Yamamoto (I) 1.2% Bunkō Katō (HRP) 0.3% |
| Kanagawa | 3 | Yōichi Kaneko | Democratic | Democratic (1 of 2) and Liberal Democratic incumbents re-elected Democratic (1 of 2) incumbent lost re-election Your pickup | Akio Koizumi (LDP) 25.2% Kenji Nakanishi (YP) 20.2% Yōichi Kaneko (DPJ) 19.2% Keiko Chiba (DPJ) 17.9% Kimie Hatano (JCP) 7.8% Eiko Kimura (SDP) 2.9% Takahiro Kai (NRP) 2.9% Manabu Matsuda (JSP) 2.4% Seiichi Yamamoto (I) 1.2% Bunkō Katō (HRP) 0.3% |
| Kanagawa | 3 | Keiko Chiba | Democratic | Democratic (1 of 2) and Liberal Democratic incumbents re-elected Democratic (1 of 2) incumbent lost re-election Your pickup | Akio Koizumi (LDP) 25.2% Kenji Nakanishi (YP) 20.2% Yōichi Kaneko (DPJ) 19.2% Keiko Chiba (DPJ) 17.9% Kimie Hatano (JCP) 7.8% Eiko Kimura (SDP) 2.9% Takahiro Kai (NRP) 2.9% Manabu Matsuda (JSP) 2.4% Seiichi Yamamoto (I) 1.2% Bunkō Katō (HRP) 0.3% |
| Niigata | 2 | Masamichi Kondō | Independent | Democratic incumbent re-elected Independent incumbent (SDP parliamentary group) lost re-election Liberal Democratic pickup | Naoki Tanaka (DPJ) 37.9% Yaichi Nakahara (LDP) 35.5% Masamichi Kondō (I – SDP) 17.2% Katsutoshi Takeda (JCP) 6.3% Satoshi Annaka (I) 2.1% Ken'ya Kasamaki (HRP) 0.9% |
| Niigata | 2 | Naoki Tanaka | Democratic | Democratic incumbent re-elected Independent incumbent (SDP parliamentary group) lost re-election Liberal Democratic pickup | Naoki Tanaka (DPJ) 37.9% Yaichi Nakahara (LDP) 35.5% Masamichi Kondō (I – SDP) 17.2% Katsutoshi Takeda (JCP) 6.3% Satoshi Annaka (I) 2.1% Ken'ya Kasamaki (HRP) 0.9% |
| Toyama | 1 | Tsunenori Kawai | Liberal Democratic | Incumbent retired Liberal Democratic hold | Kōtarō Nogami (LDP) 56.2% Yoshihiro Aimoto (DPJ) 39.0% Wataru Takahashi (JCP) 4.8% |
| Ishikawa | 1 | Naoki Okada | Liberal Democratic | Incumbent re-elected | Naoki Okada (LDP) 55.5% Akira Nishihara (DPJ) 38.5% Mikiko Chikamatsu (JCP) 6.0% |
| Fukui | 1 | Masaaki Yamazaki | Liberal Democratic | Incumbent re-elected | Masaaki Yamazaki (LDP) 51.2% Kōta Inobe (DPJ) 42.3% Kazuo Yamada (JCP) 6.5% |
| Yamanashi | 1 | Azuma Koshiishi | Democratic | Incumbent re-elected | Azuma Koshiishi (DPJ) 43.0% Noriko Miyagawa (LDP) 42.2% Hitoshi Hanada (JCP) 7.4% Naoyuki Nemoto (I) 4.5% Takashi Kigawa (I) 2.9% |
| Nagano | 2 | Toshimi Kitazawa | Democratic | Democratic incumbent re-elected Liberal Democratic pickup successful "inheritance" | Kenta Wakabayashi (LDP) 26.4% Toshimi Kitazawa (DPJ) 26.1% Yōko Takashima (DPJ) 19.6% Yōsei Ide (YP) 16.6% Sanae Nakano (JCP) 10.5% Hiroaki Usuda (HRP) 0.8% |
| Kenta Wakabayashi (LDP) 26.4% Toshimi Kitazawa (DPJ) 26.1% Yōko Takashima (DPJ) 19.6% Yōsei Ide (YP) 16.6% Sanae Nakano (JCP) 10.5% Hiroaki Usuda (HRP) 0.8% ||
| Gifu | 2 | Iwao Matsuda | Independent | Independent incumbent retired Democratic incumbent lost re-election Democratic hold Liberal Democratic pickup | Takeyuki Watanabe (LDP) 44.0% Yoshiharu Komiyama (DPJ) 23.7% Yasuo Yamashita (DPJ) 22.9% Masanori Suzuki (JCP) 7.5% Yukihiko Kanō (HRP) 1.9% |
| Gifu | 2 | Yasuo Yamashita | Democratic | Independent incumbent retired Democratic incumbent lost re-election Democratic hold Liberal Democratic pickup | Takeyuki Watanabe (LDP) 44.0% Yoshiharu Komiyama (DPJ) 23.7% Yasuo Yamashita (DPJ) 22.9% Masanori Suzuki (JCP) 7.5% Yukihiko Kanō (HRP) 1.9% |
| Shizuoka | 2 | Hirokazu Tsuchida | Democratic | Democratic incumbent re-elected Democratic incumbent retired Liberal Democratic pickup | Shigeki Iwai (LDP) 32.3% Yūji Fujimoto (DPJ – PNP) 28.3% Jun'ichi Kawai (YP) 20.9% Naoko Nakamoto (DPJ – PNP) 12.0% Hiromi Watanabe (JCP) 5.5% Yūta Nakano (HRP) 1.0% |
| Shizuoka | 2 | Yūji Fujimoto | Democratic | Democratic incumbent re-elected Democratic incumbent retired Liberal Democratic pickup | Shigeki Iwai (LDP) 32.3% Yūji Fujimoto (DPJ – PNP) 28.3% Jun'ichi Kawai (YP) 20.9% Naoko Nakamoto (DPJ – PNP) 12.0% Hiromi Watanabe (JCP) 5.5% Yūta Nakano (HRP) 1.0% |
| Aichi | 3 | Katsuhito Asano | Liberal Democratic | Incumbents retired Democratic and Liberal Democratic hold | Masahito Fujikawa (LDP) 28.6% Yoshitaka Saitō (DPJ – PNP) 23.4% Misako Yasui (DPJ – PNP) 21.1% Michiyao Yakushiji (YP) 16.5% Nobuko Motomura (JCP) 6.0% Mitsuko Aoyama (SDP) 3.2% Hiromi Nakane (HRP) 1.2% |
| Aichi | 3 | Taisuke Satō | Democratic | Incumbents retired Democratic and Liberal Democratic hold | Masahito Fujikawa (LDP) 28.6% Yoshitaka Saitō (DPJ – PNP) 23.4% Misako Yasui (DPJ – PNP) 21.1% Michiyao Yakushiji (YP) 16.5% Nobuko Motomura (JCP) 6.0% Mitsuko Aoyama (SDP) 3.2% Hiromi Nakane (HRP) 1.2% |
| Aichi | 3 | Yoshitake Kimata | Democratic | Incumbents retired Democratic and Liberal Democratic hold | Masahito Fujikawa (LDP) 28.6% Yoshitaka Saitō (DPJ – PNP) 23.4% Misako Yasui (DPJ – PNP) 21.1% Michiyao Yakushiji (YP) 16.5% Nobuko Motomura (JCP) 6.0% Mitsuko Aoyama (SDP) 3.2% Hiromi Nakane (HRP) 1.2% |
| Mie | 1 | Hirokazu Shiba | Democratic | Incumbent re-elected | Hirokazu Shiba (DPJ) 40.6% Kōhei Onozaki (LDP) 33.1% Yukako Yahara (YP) 20.1% Takeshi Nakano (JCP) 6.2% |
| Western Japan ||||||
| Prefecture | Seats up | Incumbents | Party | Result | Candidates (Party – endorsements) Vote share |
| Shiga | 1 | Kumiko Hayashi | Democratic | Incumbent re-elected | Kumiko Hayashi (DPJ) 48.6% Nobuhide Takemura (LDP) 32.3% Takashi Kawauchi (JCP) 9.9% Osamu Konishi (I) 9.1% |
| Kyōto | 2 | Tetsurō Fukuyama | Democratic | Incumbents re-elected | Tetsurō Fukuyama (DPJ) 34.3% Satoshi Ninoyu (LDP) 28.2% Mariko Narumiya (JCP) 16.6% Takuya Nakagawa (YP) 11.0% Mitsue Kawakami (DPJ) 8.7% Satoko Kitagawa (HRP) 1.1% |
| Kyōto | 2 | Satoshi Ninoyu | Liberal Democratic | Incumbents re-elected | Tetsurō Fukuyama (DPJ) 34.3% Satoshi Ninoyu (LDP) 28.2% Mariko Narumiya (JCP) 16.6% Takuya Nakagawa (YP) 11.0% Mitsue Kawakami (DPJ) 8.7% Satoko Kitagawa (HRP) 1.1% |
| Ōsaka | 3 | Motoyuki Odachi | Democratic | Democratic and Liberal Democratic incumbents re-elected Justice incumbent retired Justice hold | Hirotaka Ishikawa (Kōmei) 22.1% Issei Kitagawa (LDP) 18.1% Motoyuki Odachi (DPJ) 17.9% Mari Okabe (DPJ) 15.8% Taizō Kawahira (YP) 10.0% Tadashi Shimizu (JCP) 9.4% Nelson Yoshioki Yamawake (NRP) 2.7% Akiko Ōkawa (SDP) 2.2% Yukiko Hamano (JIP) 1.3% Toshiko Fukata (HRP) 0.5% |
| Ōsaka | 3 | Eiichi Yamashita | Justice | Democratic and Liberal Democratic incumbents re-elected Justice incumbent retired Justice hold | Hirotaka Ishikawa (Kōmei) 22.1% Issei Kitagawa (LDP) 18.1% Motoyuki Odachi (DPJ) 17.9% Mari Okabe (DPJ) 15.8% Taizō Kawahira (YP) 10.0% Tadashi Shimizu (JCP) 9.4% Nelson Yoshioki Yamawake (NRP) 2.7% Akiko Ōkawa (SDP) 2.2% Yukiko Hamano (JIP) 1.3% Toshiko Fukata (HRP) 0.5% |
| Ōsaka | 3 | Issei Kitagawa | Liberal Democratic | Democratic and Liberal Democratic incumbents re-elected Justice incumbent retired Justice hold | Hirotaka Ishikawa (Kōmei) 22.1% Issei Kitagawa (LDP) 18.1% Motoyuki Odachi (DPJ) 17.9% Mari Okabe (DPJ) 15.8% Taizō Kawahira (YP) 10.0% Tadashi Shimizu (JCP) 9.4% Nelson Yoshioki Yamawake (NRP) 2.7% Akiko Ōkawa (SDP) 2.2% Yukiko Hamano (JIP) 1.3% Toshiko Fukata (HRP) 0.5% |
| Hyōgo | 2 | Shun'ichi Mizuoka | Democratic | Incumbents re-elected | Shinsuke Suematsu (LDP) 29.4% Shun'ichi Mizuoka (DPJ) 21.8% Nobuhiko Isaka (YP) 17.6% Maki Mihashi (DPJ) 17.3% Terufumi Horiuchi (JCP) 8.4% Aimi Yoshida (NRP) 4.5% Yoshiaki Takagi (HRP) 0.9% |
| Hyōgo | 2 | Shinsuke Suematsu | Liberal Democratic | Incumbents re-elected | Shinsuke Suematsu (LDP) 29.4% Shun'ichi Mizuoka (DPJ) 21.8% Nobuhiko Isaka (YP) 17.6% Maki Mihashi (DPJ) 17.3% Terufumi Horiuchi (JCP) 8.4% Aimi Yoshida (NRP) 4.5% Yoshiaki Takagi (HRP) 0.9% |
| Nara | 1 | Kiyoshige Maekawa | Democratic | Incumbent re-elected | Kiyoshige Maekawa (DPJ) 47.6% Shūzō Yamada (LDP) 39.3% Atsushi Ōta (JCP) 13.1% |
| Wakayama | 1 | Yōsuke Tsuruho | Liberal Democratic | Incumbent re-elected | Yōsuke Tsuruho (LDP) 56.8% Kumiko Shima (DPJ) 32.7% Masaya Yoshida (JCP) 10.5% |
| Tottori | 1 | Kōtarō Tamura | Democratic | Incumbent retired Liberal Democratic pickup | Kazuyuki Hamada (LDP) 50.8% Mari Sakano (DPJ) 42.6% Naoyuki Iwanaga (JCP) 6.6% |
| Shimane | 1 | Mikio Aoki | Liberal Democratic | Incumbent retired Liberal Democratic hold successful "inheritance" | Kazuhiko Aoki (LDP) 52.9% Hirotaka Iwata (DPJ) 36.0% Tomoo Sakurauchi (YP) 6.7% Ikuhisa Ishitobi (JCP) 4.4% |
| Okayama | 1 | Satsuki Eda | Democratic | Incumbent re-elected | Satsuki Eda (DPJ) 54.8% Mika Yamada (LDP) 37.6% Yūichi Kawauchi (JCP) 7.6% |
| Hiroshima | 2 | Minoru Yanagida | Democratic | Democratic incumbent re-elected People's New incumbent retired Liberal Democratic pickup successful indirect "inheritance" from Hiroshi Miyazawa | Yōichi Miyazawa (LDP) 45.5% Minoru Yanagida (DPJ) 24.5% Kei Nakagawa (DPJ) 21.7% Osamu Ōnishi (JCP) 6.8% Mitsuo Uematsu (HRP) 1.5% |
| Hiroshima | 2 | Ikuo Kamei | People's New | Democratic incumbent re-elected People's New incumbent retired Liberal Democratic pickup successful indirect "inheritance" from Hiroshi Miyazawa | Yōichi Miyazawa (LDP) 45.5% Minoru Yanagida (DPJ) 24.5% Kei Nakagawa (DPJ) 21.7% Osamu Ōnishi (JCP) 6.8% Mitsuo Uematsu (HRP) 1.5% |
| Yamaguchi | 1 | Nobuo Kishi | Liberal Democratic | Incumbent re-elected | Nobuo Kishi (LDP) 57.8% Daijirō Harada (DPJ) 35.2% Daisuke Kisaki (JCP) 7.0% |
| Tokushima | 1 | Masakatsu Koike | New Renaissance | incumbent lost re-election Liberal Democratic pickup | Yūsuke Nakanishi (LDP) 38.3% Masuko Yoshida (DPJ) 36.7% Masakatsu Koike (NRP) 18.2% Motonoru Furuta (JCP) 4.8% Akemi Takeo (HRP) 1.0% Takashi Toyokawa (I) 0.9% |
| Kagawa | 1 | Toshio Yamauchi | New Renaissance | incumbent retired Liberal Democratic pickup | Yoshihiro Isozaki (LDP) 51.4% Sumiko Okauchi (I – DPJ, SDP) 41.2% Hitoshi Fujita (JCP) 7.4% |
| Ehime | 1 | Junzō Yamamoto | Liberal Democratic | Incumbent re-elected | Junzō Yamamoto (LDP) 52.7% Tomoko Okahiro (DPJ) 37.8% Katsuhiko Tanaka (JCP) 7.7% Akihiro Kōri (I) 1.8% |
| Kōchi | 1 | Hajime Hirota | Democratic | Incumbent re-elected | Satsuki Eda (DPJ) 37.5% Kōjirō Takano (LDP) 33.8% Kōhei Tamura (I) 15.6% Naoaki Haruna (JCP) 10.7% Toshihisa Fujishima (I) 2.4% |
| Southern Japan ||||||
| Prefecture | Seats up | Incumbents | Party | Result | Candidates (Party – endorsements) Vote share |
| Fukuoka | 2 | Tsutomu Ōkubo | Democratic | Democratic incumbent re-elected People's New incumbent lost re-election Liberal Democratic pickup | Satoshi Ōie (LDP) 35.3% Tsutomu Ōkubo (DPJ) 30.7% Masao Satō (YP) 13.1% Kaname Tsutsumi (I – DPJ, SDP) 8.0% Kiyoshi Shinoda (JCP) 6.6% Gōtarō Yoshimura (PNP) 5.2% Kazue Yoshitmi (HRP) 1.2% |
| Fukuoka | 2 | Gōtarō Yoshimura | People's New | Democratic incumbent re-elected People's New incumbent lost re-election Liberal Democratic pickup | Satoshi Ōie (LDP) 35.3% Tsutomu Ōkubo (DPJ) 30.7% Masao Satō (YP) 13.1% Kaname Tsutsumi (I – DPJ, SDP) 8.0% Kiyoshi Shinoda (JCP) 6.6% Gōtarō Yoshimura (PNP) 5.2% Kazue Yoshitmi (HRP) 1.2% |
| Saga | 1 | Hiromi Iwanaga | Liberal Democratic | Incumbent retired Liberal Democratic hold | Takamaro Fukuoka (LDP) 60.5% Michiko Katsuki (DPJ) 33.8% Katsuhiro Yamaguchi (JCP) 5.7% |
| Nagasaki | 1 | Tadashi Inuzuka | Democratic | incumbent lost re-election Liberal Democratic pickup | Genjirō Kaneko (LDP) 48.8% Tadashi Inuzuka (DPJ) 38.6% Norihiko Nakashima (YP) 8.6% Eiko Fuchise (JCP) 4.1% |
| Kumamoto | 1 | Yoshifumi Matsumura | Liberal Democratic | Incumbent re-elected | Yoshifumi Matsumura (LDP) 44.2% Kōichi Honda (DPJ) 39.3% Akiko Honda (YP) 11.4% Yasuto Adachi (JCP) 3.4% Takeo Maeda (JIP) 1.6% |
| Ōita | 1 | Shin'ya Adachi | Democratic | Incumbent re-elected | Shin'ya Adachi (DPJ) 48.7% Kiyoshi Odawara (LDP) 42.6% Kai Yamashita (JCP) 8.7% |
| Miyazaki | 1 | Shinpei Matsushita | Liberal Democratic | Incumbent re-elected | Shinpei Matsushita (LDP) 58.6% Sō Watanabe (DPJ) 34.5% Hiromitsu Baba (JCP) 6.9% |
| Kagoshima | 1 | Tetsurō Nomura | Liberal Democratic | Incumbent re-elected | Tetsurō Nomura (LDP) 55.0% Kōichirō Kakiuchi (DPJ) 38.4% Haruki Yamaguchi (JCP) 6.6% |
| Okinawa | 1 | Aiko Shimajiri | Liberal Democratic | Incumbent re-elected | Aiko Shimajiri (LDP) 47.6% Hiroji Yamashiro (I – SDP) 39.7% Tadayuki Iju (I – JCP) 10.7% Tatsurō Kinjō (HRP) 2.0% |

### Proportional preference vote

| Party | Party list votes | PR votes total | PR seats won | Top elected PR candidates with preference votes | Top elected PR candidates with preference votes | Top elected PR candidates with preference votes | Top elected PR candidates with preference votes | Top elected PR candidates with preference votes | Top elected PR candidates with preference votes |
| Democratic Party | 14,433,171 | 18,450,139.059 | 16 | Yoshifu Arita | 373,834.000 | Ryōko Tani | 352,594.303 | Masayuki Naoshima | 207,821.000 |
| Liberal Democratic Party | 10,657,166 | 14,071,671.422 | 12 | Satsuki Katayama | 299,036.267 | Yukari Satō | 278,312.851 | Eriko Yamatani | 254,469.000 |
| Your Party | 7,229,391 | 7,943,649.369 | 7 | Takumi Shibata | 87,863.000 | Katsuhiko Eguchi | 86,299.000 | Hiroshi Ueno | 52,051.578 |
| New Komeito Party | 3,555,970 | 7,639,432.739 | 6 | Kōzō Akino | 836,120.000 | Hiroaki Nagasawa | 630,775.977 | Shin'ichi Yokoyama | 579,793.000 |
| Japanese Communist Party | 3,256,068 | 3,563,556.590 | 3 | Tadayoshi Ichida | 83,806.000 | Tomoko Tamura | 45,668.540 | Mikishi Daimon | 43,897.000 |
| Social Democratic Party | 1,614,821 | 2,242,735.155 | 2 | Mizuho Fukushima | 381,554.000 | Tadatomo Yoshida | 130,745.822 | | |
| Sunrise Party | 757,939 | 1,232,207.336 | 1 | Toranosuke Katayama | 117,636.923 | | | | |
| New Renaissance Party | 1,050,977 | 1,172,395.190 | 1 | Hiroyuki Arai | 65,250.743 | | | | |
| People's New Party | 481,892 | 1,000,036.492 | 0 | | | | | | |
| Others | 823,766 | 1,137,609.086 | 0 | | | | | | |
Notable defeated PR candidates included former Tokyo Metropolitan Assemblyman Tarō Hatoyama (NRP, 23,944 votes, rank 2), former Olympic gymnast Yukio Iketani (DPJ, 54,155 votes, rank 27), former Giants manager Tsuneo Horiuchi (LDP, 101,840 votes, rank 13), former Giants infielder Kiyoshi Nakahata (SPJ, 111,597 votes, rank 2) and pro wrestler Osamu Nishimura (PNP, 34,561 votes, rank 3).