U.S. Treasury Secretary Scott Bessent’s call for the Federal Reserve to boost a facility that Japan can use to support its currency has put renewed attention on the ties between the two institutions, which typically operate at arm’s length.

After the Treasury joined forces with Japan to prop up the yen, Bessent on Sunday praised the Fed’s Foreign and International Monetary Authorities Repo Facility (FIMA), which allows foreign governments to access dollars using their Treasury holdings as collateral.

In a post on social media, Bessent described the Fed facility as an important support for Japan’s efforts and said “we would encourage it to be upsized in the coming months.”