Japan’s government is a constitutional monarchy. This means the emperor has limited powers. Instead, three branches – Executive, Legislative and Judicial – manage the country led by the Prime Minister. The National Diet Building serves the Cabinet, the 242 members of the House of Councilors (Sangiin) and the 465 members of the House of Representatives (Shūgiin). The pyramid-shaped central tower is 215 feet and was Tokyo’s tallest building from 1936 until 1964.
