US Treasury Secretary Bessent says he emphasised the importance of sound formulation and communication of monetary policy to anchor inflation expectations in meeting with the BoJ Governor Ueda

• Expressed strong support for Japan's decisive market and monetary steps to address the substantial undervaluation of the Yen.
• Bessent said the role of Yen weakness in contributing to domestic inflationary pressures in Japan.

A US Treasury Secretary publicly framing the yen as substantially undervalued, and endorsing Japanese policy steps to address it, is a marked departure from the usual American posture of rhetorical non-interference in exchange rates, and it recalls earlier episodes in which Washington tacitly blessed Japanese tightening or coordinated efforts against yen weakness. Such comments matter through two distinct channels: they lower the perceived political cost for the BoJ of further normalisation, and they shift market pricing of the risk that yen weakness itself becomes a policy target rather than a byproduct. The emphasis on communication and anchoring expectations reads as external pressure on the BoJ to sustain a tightening bias, consistent with past patterns where foreign official commentary has preceded, rather than followed, Japanese policy shifts. Worth watching is whether this is echoed in any joint or multilateral statement, whether Japanese officials lean into the framing, and whether verbal support escalates toward any discussion of intervention coordination, since past episodes show rhetoric alone tends to fade unless backed by rate action or actual operations. The yen, front-end JGBs and the rate-differential trade are where the signal transmits first.