Tokyo 8th district is a constituency of the House of Representatives in the Diet of Japan (national legislature). It is located in eastern mainland Tokyo and covers western parts of the former city of Tokyo. The district consists of Suginami ward. As of 2012, 462,330 eligible voters were registered in the district.
Before the electoral reform of 1994, Suginami had been part of Tokyo 4th district where five Representatives had been elected by single non-transferable vote.
The only representative for the 8th district since its creation has been Nobuteru Ishihara (LDP, Yamasaki→Ishihara faction), the son of former environment minister and governor of Tokyo Shintarō Ishihara (JRP, formerly LDP, Ishihara→Fukuda faction). In the most recent Representatives election of 2012, he was challenged by actor Tarō Yamamoto who ran as an independent with Social Democratic support, but trailed Ishihara by more than 60,000 votes, and Democrat Yoriko Madoka who had before been a member of the House of Councillors until the 2010 regular election.