Nikkei 225 — daily market movers
Macro backdrop
The Nikkei 225 fell about 4.90%, one of its steepest single-day drops in recent memory. A hotter-than-expected U.S. September CPI reignited fears of another Fed rate hike; the Nasdaq had dropped 1.88% overnight, and worries over the rising financing cost of AI data-center buildout and equipment pressured AI capex sentiment (Oracle and CoreWeave sold off overnight). Asia-Pacific AI and semiconductor stocks were then sold off broadly — South Korea's KOSPI fell as much as ~9% intraday, closed down 7.57% and triggered a circuit breaker, with Kioxia and SoftBank tumbling and dragging Tokyo lower.
Top 10 gainers
| # | Ticker | Company / business | Change | Likely Driver |
|---|---|---|---|---|
| 1 | 4506.T | Sumitomo Pharma Pharmaceutical company focused on psychiatry/neurology, oncology and regenerative/cell therapy | +15.81% | Led a defensive rotation into pharma; move amplified by continued optimism over North American ORGOVYX sales and its pipeline, though no single confirmed catalyst appeared on the day. |
| 2 | 7453.T | Ryohin Keikaku (Muji) Operates the Muji retail chain selling household goods, apparel and food | +9.51% | Jumped on a stronger-than-expected earnings report and robust overseas (notably China) sales growth. |
| 3 | 4502.T | Takeda Pharmaceutical Japan's largest drugmaker; GI, oncology, rare disease and plasma-derived therapies | +4.99% | Rose with defensive buying across the pharmaceutical sector. |
| 4 | 4578.T | Otsuka Holdings Pharmaceutical and nutraceutical group (includes brands such as Pocari Sweat) | +4.66% | Caught the defensive rotation into healthcare and consumer-health names. |
| 5 | 4503.T | Astellas Pharma Global pharma; urology/oncology (XTANDI) and immunology | +4.15% | Lifted by the broad rally across pharmaceutical shares. |
| 6 | 8802.T | Mitsubishi Estate Major real-estate developer; Tokyo Marunouchi office and commercial property | +3.99% | Domestic-demand, defensive property name drew rotational buying. |
| 7 | 8233.T | Takashimaya Department-store operator | +3.86% | Defensive domestic-retail buying amid the risk-off session. |
| 8 | 4507.T | Shionogi Pharma; anti-infectives, flu/COVID antivirals and pain treatments | +3.76% | Part of the defensive rotation into pharmaceutical stocks. |
| 9 | 4519.T | Chugai Pharmaceutical Biopharma (Roche affiliate); oncology and antibody drugs | +3.76% | Rose with the broad pharmaceutical-sector advance. |
| 10 | 4523.T | Eisai Pharma; neurology (Alzheimer's drug Leqembi) and oncology | +3.75% | Defensive buying into healthcare lifted the shares. |
- 1. 4506.T+15.81%Sumitomo PharmaPharmaceutical company focused on psychiatry/neurology, oncology and regenerative/cell therapyLed a defensive rotation into pharma; move amplified by continued optimism over North American ORGOVYX sales and its pipeline, though no single confirmed catalyst appeared on the day.
- 2. 7453.T+9.51%Ryohin Keikaku (Muji)Operates the Muji retail chain selling household goods, apparel and foodJumped on a stronger-than-expected earnings report and robust overseas (notably China) sales growth.
- 3. 4502.T+4.99%Takeda PharmaceuticalJapan's largest drugmaker; GI, oncology, rare disease and plasma-derived therapiesRose with defensive buying across the pharmaceutical sector.
- 4. 4578.T+4.66%Otsuka HoldingsPharmaceutical and nutraceutical group (includes brands such as Pocari Sweat)Caught the defensive rotation into healthcare and consumer-health names.
- 5. 4503.T+4.15%Astellas PharmaGlobal pharma; urology/oncology (XTANDI) and immunologyLifted by the broad rally across pharmaceutical shares.
- 6. 8802.T+3.99%Mitsubishi EstateMajor real-estate developer; Tokyo Marunouchi office and commercial propertyDomestic-demand, defensive property name drew rotational buying.
- 7. 8233.T+3.86%TakashimayaDepartment-store operatorDefensive domestic-retail buying amid the risk-off session.
- 8. 4507.T+3.76%ShionogiPharma; anti-infectives, flu/COVID antivirals and pain treatmentsPart of the defensive rotation into pharmaceutical stocks.
- 9. 4519.T+3.76%Chugai PharmaceuticalBiopharma (Roche affiliate); oncology and antibody drugsRose with the broad pharmaceutical-sector advance.
- 10. 4523.T+3.75%EisaiPharma; neurology (Alzheimer's drug Leqembi) and oncologyDefensive buying into healthcare lifted the shares.
Common Themes
Seven of the ten biggest gainers are pharmaceutical stocks, a clear sign of money rotating out of high-valuation AI/semiconductor names into defensive healthcare. Sumitomo Pharma led the group — partly amplified by stock-specific optimism over its pipeline and North American sales — while Muji operator Ryohin Keikaku topped retail on strong earnings, and domestic-demand defensives like Mitsubishi Estate and Takashimaya also drew bids.
Top 10 losers
| # | Ticker | Company / business | Change | Likely Driver |
|---|---|---|---|---|
| 1 | 6857.T | Advantest Maker of semiconductor test equipment (ATE), including for AI/HBM chips | -14.96% | The chip-test leader led declines in a region-wide AI/semiconductor sell-off. |
| 2 | 3436.T | SUMCO Manufacturer of silicon wafers for semiconductor production | -13.85% | Fell hard on wafer-demand worries as the whole semiconductor group was sold. |
| 3 | 6920.T | Lasertec Maker of EUV photomask inspection systems for chipmaking | -13.56% | Swept up in the sell-off of AI/semiconductor equipment names. |
| 4 | 5706.T | Mitsui Kinzoku (Mitsui Mining & Smelting) Non-ferrous metals; copper and advanced-packaging copper foil for chips | -13.14% | An AI-packaging materials play that pulled back with the semiconductor complex. |
| 5 | 5801.T | Furukawa Electric Maker of electric cables, optical fiber and data-center connectivity products | -13.10% | AI data-center optical-fiber/cable names were sold aggressively. |
| 6 | 5803.T | Fujikura Maker of optical fiber, cables and connectors; AI data-center optical-interconnect supplier | -12.69% | AI optical-interconnect play tumbled, compounded by a recent earnings miss overhang. |
| 7 | 285A.T | Kioxia Holdings NAND flash memory chip manufacturer | -12.32% | The memory leader fell sharply alongside the broad AI/semiconductor rout. |
| 8 | 4062.T | Ibiden Maker of IC package substrates and ceramic products | -12.22% | AI-packaging-substrate name pulled back with the chip sector. |
| 9 | 6963.T | Rohm Semiconductor maker; power and SiC devices and ICs | -11.29% | Dropped in the semiconductor-sector sell-off. |
| 10 | 7735.T | Screen Holdings Maker of semiconductor production equipment (wafer cleaning) | -10.58% | Chip-equipment shares fell with the group. |
- 1. 6857.T-14.96%AdvantestMaker of semiconductor test equipment (ATE), including for AI/HBM chipsThe chip-test leader led declines in a region-wide AI/semiconductor sell-off.
- 2. 3436.T-13.85%SUMCOManufacturer of silicon wafers for semiconductor productionFell hard on wafer-demand worries as the whole semiconductor group was sold.
- 3. 6920.T-13.56%LasertecMaker of EUV photomask inspection systems for chipmakingSwept up in the sell-off of AI/semiconductor equipment names.
- 4. 5706.T-13.14%Mitsui Kinzoku (Mitsui Mining & Smelting)Non-ferrous metals; copper and advanced-packaging copper foil for chipsAn AI-packaging materials play that pulled back with the semiconductor complex.
- 5. 5801.T-13.10%Furukawa ElectricMaker of electric cables, optical fiber and data-center connectivity productsAI data-center optical-fiber/cable names were sold aggressively.
- 6. 5803.T-12.69%FujikuraMaker of optical fiber, cables and connectors; AI data-center optical-interconnect supplierAI optical-interconnect play tumbled, compounded by a recent earnings miss overhang.
- 7. 285A.T-12.32%Kioxia HoldingsNAND flash memory chip manufacturerThe memory leader fell sharply alongside the broad AI/semiconductor rout.
- 8. 4062.T-12.22%IbidenMaker of IC package substrates and ceramic productsAI-packaging-substrate name pulled back with the chip sector.
- 9. 6963.T-11.29%RohmSemiconductor maker; power and SiC devices and ICsDropped in the semiconductor-sector sell-off.
- 10. 7735.T-10.58%Screen HoldingsMaker of semiconductor production equipment (wafer cleaning)Chip-equipment shares fell with the group.
Common Themes
The ten biggest losers are almost entirely semiconductor and AI data-center supply-chain names — test equipment, silicon wafers, photomask inspection, package substrates, power chips, and optical fiber/cable/copper-foil materials. All were front-line casualties of the region-wide AI/semiconductor sell-off, most falling more than 10% in a single session, with little stock-specific news beyond Fujikura's recent earnings-miss overhang.
Overall read
This was a textbook risk-off day: money fled high-beta AI and semiconductor names and rotated into pharmaceuticals and domestic-demand defensives. Tokyo's drop was driven by AI-valuation and financing-cost concerns (U.S. CPI, rate-hike fears, data-center capex worries) rather than deteriorating Japanese fundamentals — the broad rally in defensive pharma confirms sector rotation rather than wholesale panic.