Intervention and BOJ tightening drive yen higher, but Fed hikes limit gains
USD/JPY hits 40-year high near 164 in July In July 2026, USD/JPY reached a 40-year high near 164, driven by rising US yields, expectations of Fed rate hikes, Middle East oil shocks, safe-haven flows, and weak Japanese economic data.
This point explains the peak in USD/JPY during the period, highlighting the forces that pushed the dollar up against the yen.
Record interventions and BOJ tightening push USD/JPY down to near 152.89 Japan's rising yields, BOJ hike expectations, and record interventions (up to $98.7bn) drove USD/JPY down to near 152.89 by September–October, as carry trades unwound and the yen strengthened.
This point captures the major downward pressure on USD/JPY from intervention and BOJ policy, which was a key driver of the pair's decline.
Fed hikes to 3.75–4.00% and 5.2% US yields briefly lift USD/JPY past 157 Despite the yen's strength, the Fed raised rates to 3.75–4.00% and US yields hit 5.2%, briefly pushing USD/JPY back above 157 as the interest rate gap favored the dollar.
This point shows the counterweight from US monetary policy that limited the yen's gains and caused temporary rebounds in USD/JPY.
Unprecedented US-Japan intervention ($96.4bn) in August In August, an unprecedented joint US-Japan intervention totaling $96.4bn briefly strengthened the yen, but fading impact and Japanese foreign-bond buying soon pushed USD/JPY back to 159–160.
This point highlights a major event that had a temporary effect, illustrating the tug-of-war between intervention and market forces.