US Treasury Secretary Scott Bessent has stated that Japan has no debt owed to the US Treasury, a clarification that carries significant weight given the deep financial entanglement between the world’s largest and fourth-largest economies.
The real relationship: Japan owns America’s debt
If anything, the financial obligation runs in the opposite direction. Japan remains the largest foreign holder of US Treasuries, with holdings estimated between $1.1 and $1.2 trillion. That makes Tokyo one of Washington’s most important creditors, not the other way around.
Bessent’s clarification matters because of what’s happening beneath the surface. Japan’s economy is under serious strain, with the yen at a 40-year low and gross government debt projected between 228% and 237% of GDP for fiscal 2026. The nightmare scenario for US policymakers is straightforward: if Japan needs cash to defend its currency or manage its own debt crisis, it might start selling its massive pile of US Treasuries. A fire sale of over $1 trillion in American bonds would push US interest rates sharply higher at precisely the wrong moment, with total US debt having crossed the $40 trillion mark.
Coordinated interventions tell a bigger story
Bessent hasn’t just been issuing statements. The Treasury has been actively coordinating with Japan on currency interventions, marking the first such joint action in over a decade. Around July 31 through August 1, 2026, the two nations conducted coordinated interventions, with Bessent noting intentions to purchase Japanese yen valued at $5 to $10 billion.
Japan’s own efforts have been even more aggressive. Tokyo undertook large-scale currency interventions estimated at $52 to $54 billion to prop up the yen.
On the American side, the Treasury announced it would double buybacks of longer-dated Treasuries to at least $4 billion per operation starting September 9, 2026. The US has also made Fed facilities available, allowing Japan to borrow against its Treasury holdings rather than sell them outright.
Why the US can’t afford a Japanese crisis
America borrows more than any nation on Earth, and Japan is its single largest foreign lender. Anything that forces Japan to liquidate US Treasuries threatens the entire machinery of American government financing. With $40 trillion in total debt, even a modest increase in yields translates into tens of billions in additional annual interest payments for the US government.
Japan’s debt-to-GDP ratio exceeding 200% has been a slow-burning concern for decades, but the combination of yen depreciation and rising global interest rates has turned a chronic issue into something more acute. The Bank of Japan’s long experiment with ultra-low interest rates has left the country vulnerable as global monetary conditions tightened.
By stepping in as a buyer of longer-dated securities through the expanded buyback program, the Treasury is essentially putting a floor under prices and a ceiling on yields. Whether that ceiling holds depends largely on whether Japan’s situation stabilizes or deteriorates further.