All this talk of tariffs and the changes around it are really weighing on uncertainty, with central banks unsure what to do.There is still uncertainty on US tariff policy and how other countries will respond, so we need to scrutinize developments in gauging impact on global and Japanese economiesWill make decisions on mon pol after scrutinizing impact of US policies on markets economy, and pricesThese comments aren't telling us anything we don't know but they highlight the confusion everywhere about what's coming next.Will not comment on recent moves in Japan's long term interest rates This article was written by Adam Button at www.forexlive.com.