The United States has asked Japan to nearly triple its contribution towards hosting American forces, seeking more than 3 trillion yen ($19 billion) over five years from fiscal 2027, according to a Nikkei report published on November 13. The demand, made during negotiations over a new bilateral cost-sharing agreement, would significantly increase Tokyo’s financial commitment to the US military presence in Japan.
Japan, however, is reportedly considering a contribution of around 1.5 trillion yen ($9.5 billion) over the same period, leaving a substantial gap between the two sides. The figures have not been formally confirmed by either government, and negotiations are continuing ahead of the expiry of the existing agreement in March 2027.
The current five-year arrangement covers fiscal years 2022 through 2026 and provides for an average annual contribution of approximately 211 billion yen. That amounts to roughly 1.06 trillion yen over five years, meaning Washington’s reported demand would represent almost three times the existing package.
The funding, commonly referred to as host-nation support, helps cover expenses associated with maintaining US forces in Japan. These include salaries for locally employed Japanese workers, utilities, training relocation and improvements to military facilities.
The next agreement is expected to place greater emphasis on strengthening the resilience and survivability of American military installations. Reported areas under consideration include reinforcing buildings and moving certain base functions underground to protect facilities against potential attacks. Such measures could push annual support beyond 300 billion yen.
The negotiations carry significance beyond the size of Japan’s financial contribution. The country hosts a major American military presence in the Indo-Pacific, making its bases important to Washington’s regional security posture. The alliance is central to both countries’ approach to regional security challenges, including tensions involving China and North Korea.
For Tokyo, agreeing to a much larger payment could create additional pressure on public finances as the government also pursues its own military expansion. Japan has been increasing defence spending and investing in missile defence, military infrastructure and other capabilities.
The reported difference between Washington’s demand and Tokyo’s position could therefore become a key issue in the alliance’s financial negotiations. Both governments are expected to continue discussions in the coming weeks, with a possible agreement targeted by the end of 2026.
The final amount, spending priorities and terms of the next five-year arrangement will determine how much more Japan contributes to maintaining US forces in the country.