Japanese imperial dynasty - technically the oldest of reigning houses. According to the constitution in 1947 the highest authority in the country belongs to the people and the emperor - Tenno - is only a symbol of the state and the unity of the people. The highest organ of power in modern Japan - the parliament. It consists of two chambers: the Chamber of Representatives (elected for four years) and the House of Councilors (elected for six years). The Cabinet of Ministers headed by the prime minister is appointed by Parliament. The candidacy of the Prime Minister also approves and Caesar.