Ōta, Tokyo held a local election for the city assembly on April 22, 2007.
|-! style="background-color:#E9E9E9;text-align:left;" |Parties! style="background-color:#E9E9E9;text-align:right;" |Votes! style="background-color:#E9E9E9;text-align:right;" |%! style="background-color:#E9E9E9;text-align:right;" |Seats|-| style="text-align:left;" |Liberal Democratic Party (自由民主党, Jiyū Minshutō)| style="text-align:right;" | 66,477.592| style="text-align:right;" | | style="text-align:right;" | 19|-| style="text-align:left;" |New Komeito Party (公明党, Kōmeitō)| style="text-align:right;" | 50,564.935| style="text-align:right;" || style="text-align:right;" | 12|-| style="text-align:left;" |Japanese Communist Party (日本共産党, Nihon Kyōsan-tō)| style="text-align:right;" | 30,689.759| style="text-align:right;" | | style="text-align:right;" | 7|-| style="text-align:left;" |Democratic Party of Japan (民主党, Minshutō)| style="text-align:right;" | 45,379.179| style="text-align:right;" | | style="text-align:right;" | 6|-| style="text-align:left;" | 生活者ネットワーク | style="text-align:right;" | 5,704| style="text-align:right;" | | style="text-align:right;" | 1|-| style="text-align:left;" | 緑の党| style="text-align:right;" | 4,642| style="text-align:right;" | | style="text-align:right;" | 1|-| style="text-align:left;" |Social Democratic Party (社民党 Shamin-tō)| style="text-align:right;" | 2,960| style="text-align:right;" | | style="text-align:right;" | 1|-| style="text-align:left;" |Liberal Party| style="text-align:right;" | 2,880| style="text-align:right;" | | style="text-align:right;" | 1|-| style="text-align:left;" | Independents| style="text-align:right;" | 4,783| style="text-align:right;" | | style="text-align:right;" | 1|-|style="text-align:left;background-color:#E9E9E9"|Total (turnout 45.57%)|width="75" style="text-align:right;background-color:#E9E9E9"| N/A|width="30" style="text-align:right;background-color:#E9E9E9"| 100.00|width="30" style="text-align:right;background-color:#E9E9E9"| 50|-| style="text-align:left;" colspan=4 |Source:http://www.senkyo.janjan.jp/election/2007/13/00005605.html|}