|} is the lower house of the Diet of Japan. The House of Councillors of Japan is the upper house.
The House of Representatives has 480 members, elected for a four-year term. Of these, 180 members are elected from 11 multi-member constituencies by a party-list system of proportional representation, and 300 are elected from single-member constituencies. 241 seats are required for majority.
The overall voting system used to elect the House of Representatives is a parallel system, not a form of proportional representation. Under a parallel system the allocation of list seats does not take into account the outcome in the single seat constituencies. Therefore the overall allocation of seats in the House of Representatives is not proportional, to the advantage of larger parties. In contrast, in bodies such as the German Bundestag the election of single-seat members and party list members is linked, so that the overall result respects proportional representation.
The House of Representatives is the more powerful of the two houses, able to override vetoes on bills imposed by the House of Councillors with a two-thirds majority. It can be dissolved by the Prime Minister at will, as it was by Taro Aso on July 21, 2009.