In Japan's "lost 20 years", the long-term economic stagnation did not lead to an increase in Japanese household debt. Only 38% of households in Japan are in debt. 60% of Japanese households' financial assets are in the form of bank deposits, and adequate liquidity can withstand any sudden economic crisis. Japan's development shows that the GDP growth rate should be forgotten, and the focus should be on variables such as labor productivity, changes in the quality of life, overseas asset accumulation, and household wealth growth. This is what the world needs the most in the future.