Japanese Diet

Japanese Diet. It is the supreme organ of state power and the sole law-making body of Japan, established under the Constitution of Japan which came into effect on May 3, 1947. Modeled on the Westminster system and the Congress of the United States, it is a bicameral legislature consisting of the House of Representatives and the House of Councillors. Its primary functions include enacting laws, approving the national budget, ratifying treaties, and designating the Prime Minister of Japan.

History

The origins of the modern legislature trace back to the Meiji Restoration, with the establishment of the Imperial Diet under the Meiji Constitution in 1890. This early body, influenced by the Prussian model, was a bicameral system comprising the House of Peers and the House of Representatives, but its powers were limited by the authority of the Emperor of Japan and institutions like the Privy Council of Japan. Following World War II and the Occupation of Japan, the Supreme Commander for the Allied Powers, Douglas MacArthur, oversaw the drafting of a new constitution, which transformed the institution into a sovereign parliamentary body. The first session under the new constitution convened in 1947, marking a definitive shift from the imperial system to a Liberal democracy.

Structure and composition

The legislature is bicameral, with the House of Representatives (the lower house) and the House of Councillors (the upper house). The House of Representatives has 465 members elected for a maximum four-year term through a combination of single-member districts and Proportional representation blocks. The House of Councillors has 245 members who serve six-year terms, with half elected every three years from both prefectural districts and a nationwide Proportional representation list. Sessions are held at the National Diet Building in Nagatachō, Chiyoda, which was completed in 1936. The presiding officers are the Speaker and the President.

Powers and functions

As the "highest organ of state power," its constitutional authority is extensive. Its core powers include the enactment of all national laws, the approval of the annual national budget prepared by the Cabinet of Japan, and the ratification of international treaties such as the Treaty of San Francisco. It holds the sole power to initiate amendments to the Constitution of Japan. Furthermore, it exercises oversight of the executive through mechanisms like interpellations, committee investigations, and the power to conduct inquiries into government affairs, akin to practices in the British Parliament.

Legislative process

Bills can be introduced by members of either house or by the Cabinet of Japan, though the vast majority originate from the Cabinet. A bill passed by one house is sent to the other; if the second house amends it, a Conference committee may be convened. The House of Representatives holds a dominant position in the process: if the House of Councillors rejects a bill passed by the lower house, a two-thirds majority vote in the House of Representatives can override the veto. This primacy is most critical for the budget, treaties, and the designation of the Prime Minister of Japan, where the lower house's decision prevails in cases of disagreement.

Relationship with the executive

The executive branch, headed by the Prime Minister of Japan, is derived from and responsible to the legislature. The Prime Minister of Japan is formally designated by a resolution and must be a member of either house. The Cabinet of Japan, whose members are appointed by the Prime Minister, requires the confidence of the House of Representatives to remain in power. If the lower house passes a Motion of no confidence, the Cabinet must either resign or dissolve the House of Representatives within ten days, triggering a General election. This system mirrors the Cabinet responsibility found in the United Kingdom.

Political parties and elections

Political control has been dominated for most of the post-war period by the Liberal Democratic Party, often in coalition with partners like the Komeito. Major opposition parties have included the Constitutional Democratic Party, the Japanese Communist Party, and the Japan Innovation Party. Elections are administered by the Ministry of Internal Affairs and Communications under rules set by the Public Offices Election Law. Key electoral reforms in 1994 replaced a multi-member district system with the current mixed system, aiming to reduce the influence of intra-party factions and foster a two-party system, though the LDP has maintained a strong hold, particularly in the House of Representatives.