Politics of Japan

The post-World War Two system of politics and government in Japan is based on parliamentary democracy, i.e. citizens vote for people to represent them in the National Diet of Japan, the nation's parliament, with the government typically formed either from members of the largest political party in the House of Representatives, the lower house of the Diet, or from a coalition of various parties. The upper chamber is known as the House of Councillors.

Parliamentary systems go back to the Meiji Restoration, but Japanese party government before World War Two was limited; parties were dissolved in 1940.

The Democratic Party of Japan (DPJ) won a landslide victory in the lower house parliamentary elections in August 2009, ousting the Liberal Democratic Party (LDP) after 55 years of near-uninterrupted rule. The DPJ is the main party in a coalition government, and is also the largest group in the House of Councillors.