Japan is entering one of its most dangerous economic moments in decades, and multiple crises are converging at once. Tokyo has launched a massive 17 trillion yen ($110 billion) stimulus package to support households and boost Al and semiconductor development. But instead of restoring confidence, markets reacted with alarm. The 20-year Japanese bond yield surged to 2.8%, the highest ever recorded, signaling rising fear about sustainability. With debt already above 230% of GDP and GDP falling 1.8%