The Prime Minister of Japan (内閣総理大臣 Naikaku-sōri-daijin) is the head of government of Japan. He is appointed by the Emperor of Japan after being designated by the Diet from among its members and must enjoy the confidence of the House of Representatives to remain in office. He is the head of the Cabinet and appoints and dismisses the Ministers of State; the literal translation of the Japanese name for the office is Minister for the Comprehensive Administration of the Cabinet or Minister who Presides over the Cabinet.
The office was created in 1885, four years before the enactment of the Meiji Constitution which mentions neither cabinet nor prime minister explicitly. It took its current form with the adoption of the current constitution in 1947.
The current Prime Minister is Shinzō Abe, who took office on 26 December 2012. He is the first former PM to resume office since 1948.