The purpose of the research is to analyze the evolution of the foreign policy course of the USA in relation to post-war Japan and to show the economic, political, and strategic achievements of the "Reverse Course". The research methodology is based on the principles of historicism, comprehensiveness and multi-vectority, objectivity and systematicity. The scientific novelty lies in the fact that Ukrainian historiography on the issue of the history of post-war Japan is extremely small and has a number of white spots, in particular, on the issue of cooperation between the Japanese government and the American military administration. Conclusions. American policy in Japan proves that yesterday's enemy can become a potential partner and, even more so, an ally in the future. Having paid a bloody price for the victory, the USA began radical reforms in Japan, which were aimed, at least in the first period of occupation, at the demilitarization and deindustrialization of yesterday's enemy. However, practice has shown that building a strong and structural economy, liberalizing and democratizing political processes work much more effectively. After the end of the Korean War, Japan's economy started to grow steadily and very soon led to the famous "economic miracle." Modern Japan is a successful democratic state that ranks among the top five in terms of GDP and other economic indicators and is a pioneer in the latest technologies and science. The example of Japan, in our opinion, is indicative and proves that a country that has survived a devastating war with terrible losses can recover if deep and comprehensive reforms are carried out in all social, political, cultural, and economic spheres.