Japan Owes No Debt to US Treasury, But Its Massive Holdings Pose Hidden Risk

US Treasury Secretary Scott Bessent has clarified that Japan owes no debt to the US Treasury, contradicting a widely-held misconception. In reality, Japan remains the largest foreign holder of US Treasuries, with estimated holdings between $1.1 and $1.2 trillion.

This means Tokyo is one of Washington's most important creditors, not the other way around. The clarification matters because of Japan's precarious financial situation, with its economy under strain due to a 40-year low yen value and projected gross government debt exceeding 228% of GDP for fiscal 2026.

The nightmare scenario for US policymakers is that if Japan needs cash to defend its currency or manage its own debt crisis, it might start selling its massive pile of US Treasuries. This could lead to a fire sale of over $1 trillion in American bonds, pushing US interest rates sharply higher at the worst possible time.

To mitigate this risk, the Treasury has been coordinating with Japan on currency interventions. In July 2026, the two nations conducted joint interventions, with Bessent noting intentions to purchase Japanese yen valued at $5 to $10 billion. The US has also made Fed facilities available, allowing Japan to borrow against its Treasury holdings rather than sell them outright.