USDJPY Soars Past 155 as Fed Hike Looms, Oil Prices Weigh on Yen

The USDJPY pair pushed past 155.0 on September 15, 2026, as investors anticipated a pivotal week of central bank decisions, particularly from the Federal Reserve. The Fed is expected to announce its first interest rate hike since July 2023, with a 25 basis point increase projected to lift the federal funds rate target range to 3.75% to 4.00%. This hawkish tilt from the U.S. central bank has already sent the 10-year U.S. Treasury yield soaring to 5.02%, making dollar-denominated assets more attractive.

The Federal Reserve's commitment to taming inflation has provided a strong tailwind for the U.S. dollar, with investors pricing in the move following strong economic data points. This aggressive stance by the Fed contrasts sharply with previous cycles and highlights its focus on price stability. The rising yields on U.S. government bonds offer a compelling incentive for global capital to flow into dollar assets.

Across the Pacific, the Bank of Japan (BOJ) is also moving towards tightening, but despite this anticipated policy shift, the yen continues to struggle against the dollar. The BOJ's expected rate hike to 1.25% from 1% would signal a significant departure from Japan's decades-long ultra-loose monetary policy, but the fundamental issue remains the substantial interest rate differential between the U.S. and Japan.

The trajectory of global oil prices will remain crucial for the yen, as continued elevation or further spikes in Brent crude could exacerbate Japan's trade deficit and put renewed pressure on the currency. Investors will also be watching upcoming U.S. and Japanese economic data.