Shinjuku, Tokyo held an election to the local ward assembly on April 27, 2003,[1] as part of the 15th unified local elections.
Two of the male candidates, 54-year-old male and 39-year-old male, were previously in this office.
|-! 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;" |New Komeito party (公明党, Kōmeitō)| style="text-align:right;" | | 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;" | | style="text-align:right;" | | style="text-align:right;" | 9|-| style="text-align:left;" |Liberal Democratic Party of Japan (自由民主党, Jiyū Minshutō)| style="text-align:right;" | | 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;" | | style="text-align:right;" | | style="text-align:right;" | 3|-| style="text-align:left;" | New Socialist Party| style="text-align:right;" | | style="text-align:right;" | | style="text-align:right;" | 1|-| style="text-align:left;" | Independents| style="text-align:right;" | | style="text-align:right;" | | style="text-align:right;" | 8|-|style="text-align:left;background-color:#E9E9E9"|Total (turnout 40.52%)|width="75" style="text-align:right;background-color:#E9E9E9"| 91,293|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: Official results |}