The Japanese political system has
three types of elections: general elections to the
House of Representatives held every four years (unless the lower house is dissolved earlier), elections to the
House of Councillors held every three years to choose one-half of its members, and local elections held every four years for offices in prefectures, cities, and villages. Elections are supervised by election committees at each administrative level under the general direction of the Central Election Administration Committee, an
attached organization to the
Ministry of Internal Affairs and Communications (MIC). The minimum voting age is twenty years; voters must satisfy a three-month residency requirement before being allowed to cast a ballot. The voting age will be changed to 18 in 2016.