Nikkei 225 closes down 1.8% at 61,077.90; Seoul’s KOSPI falls 5.28%

The split between the Nikkei and TOPIX is the detail worth noting: a broad-based gain alongside a headline index decline points to a selloff concentrated in the large-cap names that dominate the Nikkei, rather than a uniform Japan risk-off move. Seoul's far steeper KOSPI drop suggests the pressure is regional but uneven, with Korea absorbing a heavier hit than Japan's broader market. Whether that divergence persists in the next session is the open question, and whether Korea's decline stays isolated or starts to bleed into regional sentiment.