The sharp declines in SoftBank, Tokyo Electron and Advantest alongside a steep drop in Samsung Electronics and SK Hynix point to renewed investor anxiety over the sustainability of massive AI related capital spending, following overnight weakness in US listed chipmakers. The relatively modest fall in Japan's broader Topix compared with the tech heavy Nikkei suggests the selloff remains concentrated in AI and semiconductor exposed names rather than reflecting a broad deterioration in market sentiment. Earlier:---Renewed fears over AI spending sustainability triggered a sharp selloff in Asian tech and chip stocks, hitting Japan's Nikkei and forcing a circuit breaker on Korea's KOSPI. Japan's Nikkei share average fell around 2% on Thursday, weighed down by heavyweight technology names even as most other stocks on the index posted gains. By contrast, Japan's broader Topix index fell a much smaller circa 0.4%, highlighting how concentrated the selloff was in semiconductor and AI adjacent names.