Japan regulator warns banks on interest rate risk

This signals a shift in supervisory tone in Japan, where ultra-loose policy has left banks exposed to duration risk in bonds and long-dated mortgages. The regulator's proactive stance suggests it sees potential stress ahead, not a current crisis, but a precursor to tighter oversight. The key question is whether this leads to formal capital or provisioning demands, which would directly impact bank lending capacity and credit costs. For market watchers, the focus is on any subsequent supervisory guidance that could force balance-sheet adjustments across the sector.