Japan's new constitution, drafted largely under the guidance of the American occupation authority led by General Douglas MacArthur, came into force on May 3, 1947, replacing the Meiji Constitution's imperial sovereignty with popular sovereignty. Article 9 famously renounced war as a sovereign right and pledged never to maintain armed forces capable of waging it, a clause still debated in Japanese politics today. The emperor's role was redefined from divine sovereign to symbolic head of state.
After Japan's catastrophic defeat in 1945, the Allied occupation under General Douglas MacArthur set about remaking the nation's political foundations from the ground up. The result, drafted in a matter of days by American officials working with a small group of Japanese advisors, was a document that would have been unthinkable a few years earlier: it stripped the emperor of divine authority, guaranteed civil liberties, gave women the vote, and enshrined the principle that sovereignty rested with the people.
The most radical clause was Article 9, in which Japan renounced war as a means of settling international disputes and forswore maintaining land, sea, or air forces with war potential. For a nation that had built an empire through military conquest across Asia and the Pacific, this was a stunning reversal, and it took effect on May 3, 1947, exactly one year after the Tokyo war crimes tribunal had begun its proceedings against Japan's wartime leaders.
Emperor Hirohito, who had once been worshipped as a living god, now appeared in a business suit at public events, a symbolic monarch stripped of political power. Article 9 remains contentious to this day, reinterpreted repeatedly to allow Japan's 'Self-Defense Forces' to expand, even as pacifist sentiment among much of the public has kept outright constitutional revision at bay for over seven decades.
Key people: Douglas MacArthur, Emperor Hirohito