2011 Japanese unified local elections

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The 17th unified local elections (第17回統一地方選挙, dai-jūnana-kai tōitsu chihō senkyo) in Japan took place in April 2011. In the first phase on April 10, 2011, 12 governors, 41 prefectural assemblies as well as five mayors and 15 assemblies in cities designated by government ordinance were elected. In the second phase on April 24, 2011, mayors and assemblies in hundreds of cities, "special wards" of Tokyo, towns, and villages were up for election. Additionally, a by-election for the National Diet was held in Aichi on April 24.

Among the elections that attracted national attention in 2011 were the gubernatorial races in Tokyo and Kanagawa and the prefectural assembly elections in Aichi and Osaka, in which new local parties threatened the position of established parties.