Recently, Japan's yen has reached its lowest level in 53 years in terms of real effective exchange rate, reflecting the country's prolonged economic stagnation. According to Jin10, the latest data from the Bank for International Settlements shows that in January, the yen's real effective exchange rate index fell to 67.73, the lowest since Japan adopted a floating exchange rate system in 1973. This index is a crucial measure of a currency's overall purchasing power and international competitiveness. Analysts indicate that the yen's weakening purchasing power highlights the structural issues Japan's economy has faced over the long term. The country's economic growth remains sluggish, and persistently low interest rates continue to exert pressure on the yen's real effective exchange rate.