Nikkei 225 Falls 3.7% to 58,845.71; Topix Drops 4.1%

The notable detail is that the broader Topix fell harder than the Nikkei, a sign the selling was broad-based rather than concentrated in the large-cap names that dominate the headline index. Without a stated catalyst, the move reads as a risk-off repricing across Japanese equities rather than a sector-specific story, which matters for anyone using Japan as a proxy for regional risk appetite. Whether the wider index continues to underperform the Nikkei is the open question.