Japan’s Energy Dependence Is Weakening the Yen

The Japanese yen remains under sustained pressure as rising oil prices compound the effects of higher U.S. Treasury yields and widening interest rate differentials. Currency markets are increasingly focused on whether Japan can continue absorbing the inflationary consequences of a weaker yen without triggering more aggressive intervention measures. The return of USD/JPY momentum above the 158 level reflects growing confidence among traders that macroeconomic forces still favor dollar strength. Consequently, Japan’s dependence on imported energy is becoming one of the central drivers behind the yen’s continued deterioration.

Fawad Razaqzada, Market Analyst at StoneX, closely tracks global macroeconomic trends, foreign exchange markets, and cross-asset risk sentiment. His focus on interest rate dynamics and currency volatility provides direct insight into why rising oil prices and higher Treasury yields are reinforcing structural weakness in the Japanese yen.

Key Themes

• Rising oil prices are increasing Japan’s import inflation pressures as the yen weakens further against the U.S. dollar.
• Higher U.S. Treasury yields continue widening the interest rate gap between the United States and Japan.
• Currency markets increasingly view Japanese intervention efforts as temporary disruptions rather than lasting reversals.

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Oil Prices Are Increasing Japan’s Import Inflation Risk

Japan’s reliance on imported energy is intensifying the economic damage caused by sustained yen weakness. Rising crude oil prices are making imported fuel, food, and industrial materials materially more expensive for Japanese businesses and consumers, particularly as USD/JPY trends higher again. Razaqzada emphasises that “Japan, like much for the eurozone relies heavily on imported energy, so a weaker yen makes oil, food, and raw-material imports significantly more expensive”, highlighting how currency depreciation is now feeding directly into domestic inflation pressures. Consequently, the inflationary burden from imported commodities is increasingly outweighing the traditional export benefits that Japan historically gained from a weaker currency. Over time, this dynamic may further complicate the Bank of Japan’s policy flexibility as inflation becomes more externally driven.

U.S. Treasury Yields Continue Strengthening Dollar Demand

Rising U.S. Treasury yields remain one of the most important structural drivers behind the Japanese yen’s decline. The sharp move higher in long-dated U.S. yields is reinforcing global demand for dollar-denominated assets while widening the interest rate differential between the Federal Reserve and the Bank of Japan. Razaqzada notes that “the US 30-year Treasury yield has climbed to 5.18% today, marking its highest level since July 2007”, underscoring how aggressive yield expansion continues supporting USD/JPY upside momentum. He further explains that “higher US yields continue to widen the gap between US and Japanese interest rates, making the dollar far more attractive relative to the yen”. As a result, currency markets increasingly appear willing to challenge Tokyo’s intervention thresholds again, particularly if U.S. yields remain elevated and oil prices continue rising.

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--- Written by Gus Farrow, Senior Manager, StoneX TV

--- Expert: Fawad Razaqzada, FOREX.com Market Analyst