Prime Minister of Thailand Prime Minister of Thailand The Prime Minister (; ; ) of Thailand is the head of government of Thailand. The prime minister is also the chair of the Cabinet of Thailand. The post has existed since the Revolution of 1932, when the country became a constitutional monarchy. Prior to the coup d'état, the prime minister is nominated by a vote in the Thai House of Representatives by a simple majority, and is then appointed and sworn-in by the King of Thailand. The house's selection is usually based on the fact that either the prime minister is the leader of the
Prime Minister of Japan the head of the "Daijō-kan" (Department of State), the highest organ of Japan's pre-modern Imperial government during the Heian period and until briefly under the Meiji Constitution with the appointment of Sanjō Sanetomi in 1871. The office was replaced in 1885 with the appointment of Itō Hirobumi to the new position of Prime Minister, four years before the enactment of the Meiji Constitution, which mentions neither the Cabinet nor the position of Prime Minister explicitly. It took its current form with the adoption of the Constitution of Japan in 1947. To date, 62 people have served this position. The current