Japan's three lost decades stand as the most comprehensive real-world experiment disproving Keynesian stimulus theory. Since 1990, Japan has deployed every tool in the government spending playbook: massive infrastructure projects, quantitative easing, negative interest rates, and debt-to-GDP ratios exceeding 260%. The result? Persistent stagnation, deflation, and an entire generation that has never experienced genuine economic growth. The numbers are damning. Japan's central bank balance sheet expanded from 20% of GDP in 2000 to over 130% today, while government debt exploded from manageable levels to the highest in the developed world. Yet GDP growth averaged barely 1% annually, wages remained flat, and productivity gains evaporated. Each stimulus package promised recovery but delivered only temporary sugar highs followed by deeper malaise. What Japan actually needed was the creative destruction that recessions provide: allowing zombie companies to fail, clearing malinvestments, and letting market forces reallocate resources to productive uses. Instead, endless bailouts and cheap money preserved inefficient structures while punishing savers and productive enterprises. The Bank of Japan became the largest owner of Japanese stocks and bonds, turning free markets into centrally planned theater. The lesson is crystal clear: you cannot print or spend your way to prosperity. Japan's lost decades prove that stimulus creates dependency, not growth. Real recovery requires letting markets work, allowing failures to clear, and rebuilding on solid foundations rather than papering over structural problems with monetary heroin.