Introduction: At the end of 2025, the Japanese government approved its largest-ever annual budget. Against a backdrop of rising interest rates, persistent inflation pressures, and an aging population, this record-breaking fiscal plan is more than a macroeconomic milestone—it serves as a critical signal for household financial planning and long-term wealth management. For both everyday households and high-net-worth individuals, understanding Japan’s fiscal direction is not about timing short-term market movements, but about reassessing asset allocation strategies to ensure long-term stability and resilience in an increasingly uncertain environment.