In July 2025, the United States and Japan reached a major trade agreement that includes Japan’s pledge to invest $550 billion in U.S. industries in return for lower tariffs on Japanese imports. The details of this investment pledge became clearer on Sept. 4, when U.S. Secretary of Commerce Howard Lutnick and Ryosei Akazawa, then Japan’s top trade negotiator, signed a memorandum of understanding (MOU).1
According to the MOU, several key features of the investment arrangement have emerged. First, Japan must commit the full $550 billion by the end of President Donald Trump’s second term. Second, investment projects will be selected and managed by the United States.2 While Japan has the right to veto the proposed project, the U.S. can respond by raising tariffs on Japanese imports.
Third, the agreement includes a profit-sharing arrangement: Cash flows generated by the investments are split equally until Japan recoups its “deemed allocation amount,” which is the principal investment plus interest payment, after which 90% of the cash flow goes to the U.S. and 10% to Japan.
In practice, this structure makes Japan’s commitment resemble a loan rather than an equity investment, since Japan does not become a shareholder in the projects. The interest rate of this “loan” is called “deemed interest rate,” which is based on a benchmark rate plus a spread that depends on the project’s risk profile. Once the principal and accrued interest are fully repaid, Japan begins receiving returns through its 10% profit share. Nevertheless, it remains unclear what would happen if Japan were unable to fully recoup its deemed allocation amount. In that case, the “loan” would likely become unrecoverable, and Japan would have to write it off.