2005 Tokyo prefectural election

Prefectural elections were held in Tokyo for the city's Metropolitan Assembly on 3 July 2005. The election was a great success for the Democratic Party of Japan which won 16 additional seats, closing in on the Liberal Democratic Party.

Results
! style="background-color:#E9E9E9;text-align:left;" |Parties ! style="background-color:#E9E9E9;text-align:right;" |Candidates ! style="background-color:#E9E9E9;text-align:right;" |Votes ! style="background-color:#E9E9E9;text-align:right;" |% ! style="background-color:#E9E9E9;text-align:right;" |Seats NB: Results are incomplete due to lack of sources.
 * style="text-align:left;" |Liberal Democratic Party of Japan (自由民主党, Jiyū Minshutō)
 * style="text-align:right;" | 57
 * style="text-align:right;" | 1,339,548
 * style="text-align:right;" | 30.7
 * style="text-align:right;" | 48
 * style="text-align:left;" |Democratic Party of Japan (民主党, Minshutō)
 * style="text-align:right;" | 51
 * style="text-align:right;" | 1,070,893
 * style="text-align:right;" | 24.5
 * style="text-align:right;" | 35
 * style="text-align:left;" |New Komeito party (公明党, Kōmeitō)
 * style="text-align:right;" | 23
 * style="text-align:right;" | 786,292
 * style="text-align:right;" | 18.0
 * style="text-align:right;" | 23
 * style="text-align:left;" |Japanese Communist Party (日本共産党, Nihon Kyōsan-tō)
 * style="text-align:right;" | 43
 * style="text-align:right;" | 680,200
 * style="text-align:right;" | 15.6
 * style="text-align:right;" | 13
 * style="text-align:left;" |Social Democratic Party (社民党 Shamin-tō)
 * style="text-align:right;" | 1
 * style="text-align:right;" | 10,165
 * style="text-align:right;" | 0.2
 * style="text-align:right;" | 0
 * style="text-align:left;" |Tokyo Seikatsusha Network (東京・生活者ネットワーク)
 * style="text-align:right;" | 10
 * style="text-align:right;" | 181,020
 * style="text-align:right;" | 4.1
 * style="text-align:right;" | 3
 * style="text-align:left;" |Gyokaku 110-ban (行革110番)
 * style="text-align:right;" | 1
 * style="text-align:right;" | 24,259
 * style="text-align:right;" | 0.6
 * style="text-align:right;" | 1
 * style="text-align:left;" | Others
 * style="text-align:right;" | 4
 * style="text-align:right;" | 27,784
 * style="text-align:right;" | 0.6
 * style="text-align:right;" | 0
 * style="text-align:left;" | Independents
 * style="text-align:right;" | 30
 * style="text-align:right;" | 248,999
 * style="text-align:right;" | 5.7
 * style="text-align:right;" | 4
 * style="text-align:left;background-color:#E9E9E9"|Total (turnout 43.99%)
 * width="30" style="text-align:right;background-color:#E9E9E9"| 220
 * width="75" style="text-align:right;background-color:#E9E9E9"| 4,435,435
 * width="30" style="text-align:right;background-color:#E9E9E9"| 100.00
 * width="30" style="text-align:right;background-color:#E9E9E9"| 127
 * style="text-align:left;" colspan=4 |Sources:Tokyo electoral commission: 投開票結果, JANJAN: 東京都議会議員選挙, Asahi Shimbun:
 * }
 * style="text-align:right;" | 5.7
 * style="text-align:right;" | 4
 * style="text-align:left;background-color:#E9E9E9"|Total (turnout 43.99%)
 * width="30" style="text-align:right;background-color:#E9E9E9"| 220
 * width="75" style="text-align:right;background-color:#E9E9E9"| 4,435,435
 * width="30" style="text-align:right;background-color:#E9E9E9"| 100.00
 * width="30" style="text-align:right;background-color:#E9E9E9"| 127
 * style="text-align:left;" colspan=4 |Sources:Tokyo electoral commission: 投開票結果, JANJAN: 東京都議会議員選挙, Asahi Shimbun:
 * }
 * style="text-align:left;" colspan=4 |Sources:Tokyo electoral commission: 投開票結果, JANJAN: 東京都議会議員選挙, Asahi Shimbun:
 * }