General Douglas MacArthur, who had been commander of the United States Army Forces in the Far East, landed at Atsugi in Kanagawa Prefecture on 30 August, 1945. As Supreme Commander for the Allied Powers (SCAP), he was responsible for steering a war-ravaged Japan on a course to recovery.
The Instrument of Surrender was signed on 2 September, 1945, aboard the USS Missouri. The same flag that had flown on Commodore Perry’s ship in 1853 was borrowed from the U.S. Naval Academy Museum for the occasion—a symbol made all the more poignant because MacArthur was a blood relative of Perry.
MacArthur on board the USS Missouri. Commodore Perry’s flag can be seen in the background.
SCAP (the designation was also used to refer to the allied offices more generally) had much work to do. First, the military—so intertwined with Japanese politics—needed to be disbanded and a secular, representative government established in its place. For the duration of the occupation, this new government remained under the considerable influence of SCAP and its policies. Then, there was the issue of punishing those responsible.
Shortly after arriving, MacArthur ordered the arrest of suspected war criminals, including Japan’s wartime prime minister and former general of the Imperial Japanese Army, Tojo Hideki. Tojo shot himself in the chest when forces came for him, only to be resuscitated by U.S. doctors. Conspicuously, Emperor Hirohito was not arrested. While some called for the emperor to be tried, MacArthur believed that as the representative of the Japanese people, implicating him directly would make the goal of rebuilding impossible. Instead, Hirohito was used to give legitimacy to reforms, and SCAP went to great lengths to ensure that incriminating evidence against the emperor did not surface publicly.
MacArthur’s decision still reverberates today, especially in Japan’s relationship with its Asian neighbors. There is a credible argument that it created a moral divide between the Japanese people and the army, such that rhetoric today sometimes revolves around how the military alone was responsible for the country’s aggression, indirectly lightening the burden of collective blame from the nation and its citizens.
MacArthur casually stands next to Emperor Hirohito—one of the most famous photographs from the occupation.
Nevertheless, MacArthur realized the importance of separating state and religion. The notion that the emperor was a direct descendant of the sun goddess Amaterasu has roots in early Japanese history, and much wartime propaganda rested on the concept of divine racial purity. In an imperial rescript issued on 1 January, 1946, the Imperial Family declared that the ties between the Sovereign and the people are not predicated on the “false conception that the Emperor is divine.” The new constitution enacted in 1947—the most remarkable achievement of the occupation—went further, defining the emperor as “the symbol of the State and of the unity of the People, deriving his position from the will of the people with whom resides sovereign power.”
This 1947 constitution also outlawed the use of war to settle international disputes in Article 9. The wording is still debated today as the more conservative side of Japan’s polity seeks ways for the country to play a larger military role abroad.
Article 9. Aspiring sincerely to an international peace based on justice and order, the Japanese people forever renounce war as a sovereign right of the nation and the threat or use of force as means of settling international disputes… [L]and, sea, and air forces, as well as other war potential, will never be maintained. The right of belligerency of the state will not be recognized.
By 1952, when the American occupation ended, Japan had seen reforms to its political structure, new land and labor acts, changes to its education system, and the enfranchisement of women. The country was ready to chart its own recovery. Japan’s rise from the ashes of war to become a global economic superpower is one of the most phenomenal stories of the twentieth century. While the spirit of the Japanese people was paramount, other factors aided this “miraculous” rise: the currency was fixed at ¥360 to the U.S. dollar from 1949 until 1971; the U.S. military presence kept defense spending low; and Japan was able to import and refine superior Western technology.
The economic leaps of the 1960s, 70s, and 80s were driven by a highly educated workforce and a government fully supportive of Japanese conglomerates. At the heart of the zaibatsu—interlinked mega-corporations like Mitsubishi, Mitsui, and Sumitomo—were the salarymen: employees known for long hours and unfaltering loyalty. Statistics show that throughout the post-war era, Japanese workers put in significantly more hours per year than their counterparts in the West, though modern “Work Style Reform” laws in the 2020s have finally begun to reduce these figures.
The 1974 Toyota Corolla was one of the best-selling cars in the world, proving Japan could build reliable automobiles.
Between 1985 and 1989, the stock market tripled in value, fueled by speculative investment. The Nikkei 225 index famously peaked at 38,957 on 29 December, 1989. Within a year, the bubble burst, leading to the “Lost Decade.” While this peak remained an untouchable ceiling for thirty-four years, the Nikkei finally surpassed its bubble-era high in early 2024, eventually crossing the 40,000 mark—a symbolic moment for the Japanese economy. The legacy of the bubble still impacts policy. To stimulate growth, the government has run a deficit since 1991. As of 2026, Japan’s total gross debt stands at over 1.3 quadrillion yen (roughly $8.5 trillion), representing approximately 255% of GDP—the highest among developed nations.
Beyond economics, culture underwent a massive transformation. The U.S. occupation introduced Hollywood movies and Western lifestyles to the youth. Social customs also changed significantly; before the war, most marriages were o-miai (arranged introductions). Today, renai-kekkon (love marriages) are the overwhelming norm. This was not a one-way street; Japan exported its own culture through cinema, manga, and anime. The miniaturization of electronics also had a global cultural impact. However, societal shifts have also brought challenges. The “job for life” culture has eroded, leading to a workforce where nearly 40% of employees are classified as temporary or non-regular staff.
Gender roles have also shifted. Traditionally a patriarchal society, Japan saw women enter the workplace in larger numbers by the late 1960s. Women graduate from university at a rate exceeding 50% today, compared to just 3% in 1960. Despite this, the struggle to balance career and family contributes to a persistently low fertility rate. As of 2026, the population has dipped to approximately 124 million. Projections suggest this could decline to 80 million by 2070, with roughly 40% of the population expected to be over 65. These demographic shifts represent Japan’s greatest challenge in the 21st century.
Skepticism toward immigration remains, but the landscape is changing. As of 2026, approximately 4.5% of Tokyo’s population is non-Japanese. The hosting of the Tokyo 2020 Olympics and the subsequent expansion of visa categories for “Specified Skilled Workers” show a definitive move toward greater internationalization to combat labor shortages. While the challenges are significant, Japan has consistently proven itself to be one of the most resilient nations in the face of seismic change.
