What happened
The Nikkei Average closed at 63290.11, down 1369.36 yen, after falling as much as 1900 yen intraday on selling in AI-linked names, with Advantest, Tokyo Electron, SoftBank Group and Ibiden alone pushing the index down about 1163 yen.
Why it matters
That single-day drop shows how quickly weakness in AI-linked shares can drag down the entire index, even as over half of Tokyo Stock Exchange stocks rose on the day and defensive sectors attracted buyers.
Summaries like this, every morning.
The selloff began in the US, where major indices fell on April 29 after Alphabet's earnings disappointed and Amazon's July–September 2026 free cash flow deficit widened, reviving doubts about whether巨额 AI investments can generate matching profits. Intel also slumped in after-hours trading on a weaker-than-expected earnings forecast, which hit its major customer Ibiden with a stop-loss selloff in Tokyo. The Nikkei's intraday drop exceeded 1900 yen at one point, and a more than 5% plunge in South Korea's KOSPI added to the selling pressure from short-term futures traders. Despite the turmoil, the market showed resilience: more than half of Prime Market stocks rose, and 16 sectors including airlines, shipping, and retail gained as investors rotated into domestic demand and defensive names. Oriental Land also drew attention after announcing strong earnings and an upward revision to its full-year forecast. The key question now is whether Kioxia HD's interim earnings at 18:45 will reassure investors or add to the unease.
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Scott Chronert, head of U.S

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