Japan's Postwar Constitution, adopted in 1947, marked a significant shift from the Meiji Constitution. It introduced key principles like popular sovereignty, the Emperor's symbolic role, and the renunciation of war. The constitution established a parliamentary democracy with separation of powers and guaranteed fundamental rights. The constitution's structure includes a bicameral legislature, a Prime Minister as head of government, and an independent judiciary. It emphasizes local self-government and protects individual freedoms. Despite ongoing debates about revisions, particularly regarding Article 9, the constitution remains unamended since its adoption.