Shinjuku, Tokyo held a local election for the city assembly on April 22, 2007 as part of the 2007 Japanese unified local elections.
Election results
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! 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
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| style="text-align:left;" |Liberal Democratic Party (自由民主党, Jiyū Minshutō) | style="text-align:right;" | 23,018 | style="text-align:right;" | | style="text-align:right;" | 10 |- | style="text-align:left;" |New Komeito Party (公明党, Kōmeitō) | style="text-align:right;" | 19,806 | style="text-align:right;" | | style="text-align:right;" | 9 |- | style="text-align:left;" |Japanese Communist Party (日本共産党, Nihon Kyōsan-tō) | style="text-align:right;" | 15,642 | style="text-align:right;" | | style="text-align:right;" | 8 |- | style="text-align:left;" |Democratic Party of Japan (民主党, Minshutō) | style="text-align:right;" | 10,990 | style="text-align:right;" | | style="text-align:right;" | 5 |- | style="text-align:left;" |New Socialist Party (新社会党, Shin-Shakaitō) | style="text-align:right;" | 2,358 | 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;" | 2,108 | style="text-align:right;" | | style="text-align:right;" | 1 |- | style="text-align:left;" | Independents | style="text-align:right;" | 8,216 | style="text-align:right;" | | style="text-align:right;" | 4 |- |style="text-align:left;background-color:#E9E9E9"|Total (turnout 40.15%) |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"| 38 |- | style="text-align:left;" colspan=4 |Source: |}