On a May evening in Tokyo, Treasury Secretary Scott Bessent dined with Japan's Finance Minister Satsuki Katayama at a restaurant in a 400-year-old garden. Bessent, a former hedge fund manager, expressed frustration with Prime Minister Sanae Takaichi's economic agenda of expanded spending and pressure on the Bank of Japan to maintain low rates. He argued this drove the yen to four-decade lows, worsening Japanese inflation and hurting American exporters per President Trump's views. Bessent urged central bank autonomy and rate hikes.

In late July, Katayama and Bessent coordinated a joint currency intervention, briefly strengthening the yen from 164 to the dollar. At a G20 meeting in Asheville, N.C. this week, Katayama explained the administration's policy of raising spending while lowering debt-to-GDP ratios, stating Bessent "understood and appreciated" her explanation. She denied he suggested BOJ rate hikes.

Katayama, 67, a former Ministry of Finance bureaucrat and University of Tokyo graduate, is seen by economists like Izumi Devalier of Bank of America as a crucial bridge restraining Takaichi's fiscal instincts. Pressure mounts as the yen slipped back to 160 per dollar, with analysts saying permanent strength requires significant policy shifts.