TOKYO - Tokyo stocks fell on August 24, with the Nikkei 225 closing at 65,528.09, down 488.27 points, or 0.74%, as global bond-yield pressure and caution ahead of Nvidia’s earnings triggered selling in artificial intelligence and semiconductor-related shares, even as the broader TOPIX edged higher.
The TOPIX rose 6.00 points, or 0.15%, to 4,073.29, showing that the day’s weakness was concentrated in the Nikkei’s high-priced technology and AI-linked components rather than the full market. Prime Market volume totaled about 1.88234 billion shares, with 843 stocks rising, 662 falling and 51 unchanged.
The Nikkei started slightly lower at 65,978.95, briefly climbed to 66,257.73, then weakened in the afternoon as futures-led selling pushed the index below 66,000. The benchmark touched an intraday low of 65,470.95 before closing near that level, extending its decline from the previous session.
Nikkei CNBC-style market commentary centered on the familiar divide between the headline index and the broader market. The Nikkei remained vulnerable to a small group of AI and semiconductor-related shares, while TOPIX continued to find support from materials, machinery, retailers, shipping and selected domestic-demand stocks.
The latest decline followed a week in which global investors became more cautious toward growth stocks as long-term interest rates rose. Higher yields reduce the relative appeal of equities and place particular pressure on technology companies whose valuations depend heavily on future earnings growth.
Semiconductor shares also faced caution before Nvidia’s May-July earnings announcement later in the week. Investors have treated Nvidia’s results as a key test of whether the global AI investment cycle remains strong enough to justify high valuations across chipmakers, equipment suppliers, memory producers, data-center infrastructure companies and electronic-component makers.
The Philadelphia Semiconductor Index had fallen in the previous U.S. session despite broader gains in major American indexes, weakening sentiment toward Tokyo’s semiconductor complex. That pressure spread to Japanese shares even though the Dow, S&P 500 and Nasdaq had all risen.
The South Korean market also weighed on sentiment during Tokyo trading. Investors watched the Kospi weaken during the session, reinforcing the cross-market link between Japanese chip-equipment makers, South Korean memory producers, Taiwanese foundries and U.S. AI shares.
Kioxia Holdings was one of the largest decliners, falling 6.24% to 50,930 yen. The memory-chip maker remains one of Tokyo’s clearest gauges of confidence in AI servers, high-bandwidth memory and data-center demand, but its share price has become highly sensitive to overseas positioning and profit-taking.
SoftBank Group fell 5.32% to 4,975 yen, weighing heavily on the Nikkei because of its large index influence. The company remains a proxy for global AI investment sentiment through its exposure to OpenAI, robotics, digital infrastructure and other large-scale technology themes.
SoftBank’s decline also reflected renewed caution after the company announced plans to issue 1 trillion yen in bonds to individual investors. The fundraising may support its AI ambitions, but it also keeps attention on leverage, funding costs and the scale of capital needed for its technology strategy.
Advantest dropped 3.89% to 34,500 yen, placing further pressure on the Nikkei. The chip-testing equipment maker remains one of Japan’s most direct beneficiaries of advanced semiconductor demand, but it is also one of the stocks most exposed when investors reduce AI-related risk.
Furukawa Electric fell 5.05% and Fujikura lost 5.00%, showing that selling spread beyond chipmakers into data-center infrastructure names. Both companies had been strong second-wave AI beneficiaries because of demand for optical fiber, cables, high-speed networks and power-related systems, but their valuations have made them vulnerable during AI corrections.
Mercari, GMO Internet, Nitto Boseki and other growth or technology-linked shares also declined. The weakness showed that investors were reducing exposure not only to semiconductor hardware but also to companies where valuations had risen quickly or earnings expectations appeared demanding.
Tokyo Electron, by contrast, rose 1.58% to 55,150 yen, showing that selling was not uniform across the semiconductor complex. Disco and Hitachi were also firm earlier in the session, while some machinery and materials names attracted buying.
The TOPIX’s resilience reflected strength outside the AI-heavy parts of the market. Matsuya, Toyo Engineering, Sumitomo Metal Mining, Hitachi Construction Machinery, Tomen Devices, Bengoshi.com, Money Forward, en Japan, UACJ and JX Advanced Metals were among the stronger Prime Market names.
Sumitomo Metal Mining rose 6.64%, while JX Advanced Metals gained 5.43%. The strength in nonferrous metals and materials showed that investors were still willing to buy companies tied to electrification, infrastructure, defense, energy systems, data centers and global capital spending.
Hitachi Construction Machinery rose 6.39%, suggesting renewed demand for industrial cyclicals and companies exposed to mining, infrastructure and overseas construction activity. Toyo Engineering also gained strongly, reflecting interest in engineering and energy-related projects.
Matsuya jumped 10.28%, pointing to continued appetite for retail and inbound-tourism-related shares. Domestic-demand and consumer names with brand strength or pricing power remain attractive to investors looking for alternatives to volatile AI shares.
Money Forward and Bengoshi.com also rose, showing that selected software and digital-services names can still attract buying when company-specific factors or earnings expectations support the story. The market is no longer rejecting growth entirely, but it is becoming more selective.
Japan’s currency and bond markets remained central to the day’s equity tone. The yen was near the 159-yen range against the dollar, stronger than its late-July lows but still weak enough to maintain imported inflation pressure.
A weak yen supports exporters by lifting the yen value of overseas earnings, but it also raises costs for imported fuel, food, chemicals, industrial materials and consumer goods. That makes the currency a household and political issue, not only a corporate earnings factor.
Japanese government bond yields remained close to multi-decade highs. Reuters has reported that the 10-year JGB yield recently approached 3%, a level not seen since the 1990s, as markets priced in persistent inflation, fiscal concerns and expectations for further Bank of Japan tightening.
The Finance Ministry is considering setting the assumed interest rate used to calculate debt-servicing costs at 3.8% for next fiscal year’s budget request, according to Reuters. That would be the highest level in 29 years and would mark a sharp increase from the 3.0% used in the fiscal 2026 budget.
The proposed assumption shows how rising interest rates are beginning to affect government finances directly. Higher assumed rates increase projected debt-servicing costs and make it harder for Prime Minister Sanae Takaichi’s administration to balance household relief, defense spending and long-term strategic investment.
The government is pursuing more than 370 trillion yen in public and private investment through fiscal 2040, targeting semiconductors, artificial intelligence, energy security, defense, shipbuilding, robotics, space and other strategic sectors. That agenda supports many companies in Japan’s growth sectors, but investors remain focused on how it will be financed.
Higher bond yields complicate that strategy. They raise borrowing costs for the government, increase the discount rate applied to equity valuations and intensify scrutiny of any tax cuts or subsidies that are not matched by stable revenue.
The Bank of Japan’s September 17-18 meeting is becoming a key event for markets. The BOJ kept its policy rate at 1% in July, but board member Hajime Takata dissented in favor of a hike to 1.25%, and the central bank warned that underlying inflation could exceed its 2% target.
Japan’s July inflation data strengthened expectations that the BOJ may tighten again. Core consumer prices, excluding fresh food, rose 1.8% from a year earlier, while the index excluding both fresh food and energy rose 1.9%. The figures suggested that inflation pressure is moving beyond volatile food and energy components.
The inflation data are important because they followed a sharp rise in producer prices and continued yen weakness. If companies continue passing higher input costs on to consumers, the BOJ may judge that Japan is moving closer to a more durable wage-price cycle.
For households, however, higher inflation remains a burden. Wage growth has improved, but consumers continue to face higher costs for groceries, gasoline, electricity, transport and daily services. TV Tokyo’s broader business themes remain focused on whether pay increases are strong enough to offset the rise in living costs.
The government is considering measures to ease household pressure, including food-related support and possible tax relief. Such steps could cushion consumers but may worsen fiscal concerns if they require more borrowing or lack clear replacement revenue.
Companies also face a difficult cost environment. Businesses with pricing power, strong brands or essential products can pass on higher costs more easily. Smaller firms, logistics operators, retailers and import-dependent manufacturers face margin pressure if the yen remains weak and labor, energy and materials costs keep rising.
Oil prices eased on August 24 as investors awaited U.S. sanctions on Iran, but Brent crude remained around the low-$90 range. Reuters reported that oil fell about 2% even as markets watched Washington’s planned measures against Tehran and the risk of retaliation around the Strait of Hormuz.
For Japan, oil near $90 remains a significant risk because the country imports most of its energy. Higher crude costs feed into gasoline, electricity, airlines, logistics, chemicals and manufacturing, and the effect is amplified when the yen is weak.
The global backdrop was cautious despite some support from U.S. equities. Investors were focused on Nvidia’s earnings, U.S. Treasury market stress, Jackson Hole speeches and the possibility of further sanctions on Iran.
U.S. debt concerns continued to unsettle currency and bond markets. Reuters reported that the dollar hovered near multi-month lows as investors questioned the effectiveness of Treasury buybacks and worried about the country’s fiscal position. That helped limit yen weakness, but it did not remove pressure from Japan’s own bond market.
The Jackson Hole conference later in the week will be watched closely for comments from Federal Reserve Chair Kevin Warsh and other policymakers. Any message that U.S. rates may remain high would support the dollar and could increase pressure on the yen. A more dovish message could ease currency pressure and support global equities.
Nvidia’s earnings are the most important corporate event for the AI trade. Strong revenue and guidance could revive buying in Japanese semiconductor and data-center infrastructure shares. Any disappointment, especially on margins, orders or capital spending, could trigger another round of selling in Kioxia, Advantest, SoftBank Group, Fujikura, Furukawa Electric, Tokyo Electron and related names.
What to watch next: whether the Nikkei can regain 66,000 after closing below that level, whether TOPIX can continue outperforming, and whether selling in AI and semiconductor shares stabilizes before Nvidia’s earnings.
Investors will also monitor whether Kioxia, SoftBank Group, Advantest, Fujikura and Furukawa Electric attract bargain buying after sharp declines, or whether the AI correction deepens.
The 10-year JGB yield’s distance from 3% remains a critical domestic signal. A move above that level could intensify concern over fiscal sustainability, equity valuations and the government’s debt-servicing costs.
The yen around 159 to the dollar will remain central. A move beyond 160 would revive intervention speculation and strengthen expectations for a September BOJ rate hike, while a stronger yen would ease imported inflation but could pressure exporters.
Oil near $90, U.S. sanctions on Iran, Nvidia’s results and Jackson Hole guidance will shape the next stage of trading. August 24 showed that Japan’s broader market can still hold up, but the Nikkei remains vulnerable whenever rising yields and AI caution hit its largest technology-related stocks.
