The Japanese yen continues to weaken, approaching levels not seen since 1986 — the lowest in nearly 40 years. Despite the Bank of Japan lifting its policy rate to 1%, the highest in 31 years, and jointly using a record ¥11.7 trillion from the Ministry of Finance to intervene in the currency market, the depreciation trend remains unchecked.
Market analysis points to the core contradiction: the persistent widening of the US-Japan interest rate differential. Short-end spreads have reached 263 basis points, fueling crowded carry trades where investors borrow cheap yen to buy higher-yielding dollar assets. Japan's own heavy debt burden severely limits the BOJ's room for further rate hikes. The Federal Reserve's hawkish stance has strengthened the dollar, while geopolitical tensions and energy price volatility exacerbate imported inflation for Japan. These combined factors highlight how Japanese monetary policy independence has become deeply constrained by the US interest rate cycle, making domestic tools insufficient to reverse the trend alone.