The Emperor of Japan is the title of Japanese monarch, the supreme leader of Shinto and the symbol of Japan. The Japanese Prime Minister is the highest head of the Japanese Cabinet. The main duty of the emperor now is to appoint the Prime Minister of the Cabinet and approve laws, decrees and treaties; The Japanese Prime Minister is mainly responsible for leading the operation of various administrative organs. The Japanese emperor and prime minister have different powers. The Japanese emperor is just a puppet and has no real power. The real power lies in the hands of the responsible cabinet produced by the parliament. As the prime minister of the cabinet, the Prime Minister is the ruler of the cabinet and also controls the parliament through his own political party. So the power of the prime minister is far greater than that of the Japanese emperor. They are produced in different ways. The Japanese emperor is an inheritance system, and the family unit is hereditary, while the Japanese prime minister is elected by the National Assembly and is not hereditary.