Nikkei 225 closes down 4.9% at 64,425.95; Kospi sinks 7.6%

The divergence matters more than the headline drop: the Nikkei's 4.9% decline against the Topix's shallower 2.4% points to weakness concentrated in large-cap index heavyweights rather than a uniform selloff across Japanese equities. Korea's far steeper 7.6% Kospi fall suggests Asia's tech-levered markets are bearing the brunt, a pattern worth tracking if it persists into other regional opens. Whether this proves a single-session shock or the start of broader risk repricing is the open question.