TOKYO - Tokyo stocks rose on August 13, with the Nikkei 225 advancing to 68,601.21, up 1.6%, as semiconductor and artificial intelligence-related shares followed Wall Street higher, while the broader TOPIX climbed to a record high despite continued concern over wholesale inflation, the yen and Bank of Japan rate-hike expectations.
The TOPIX closed at 4,176.04, up 0.89%, extending its recent rise and underscoring the breadth of Japan’s equity recovery. Unlike several sessions in late July and early August, when the Nikkei was pulled sharply by a small group of AI-related heavyweights, August 13 showed stronger participation from both growth and value shares.
The Tokyo market was supported by a rally in U.S. technology shares after better-than-expected results from artificial intelligence infrastructure companies and a mild U.S. inflation reading. The Philadelphia Semiconductor Index rose about 2.5%, helping revive buying in Japanese chip-testing, memory, component and semiconductor-equipment stocks.
Nikkei CNBC-style market commentary centered on a change in the tone of the rally. Investors were no longer buying only a handful of high-priced AI shares or defensive value names. Instead, buying spread across semiconductor suppliers, financials, materials and companies with stronger earnings outlooks.
The latest advance also reflected improved confidence in corporate profits. Reuters reported that about 18% of TOPIX companies with fiscal years ending in March had raised their annual recurring profit forecasts in the first quarter, compared with only 2% that lowered them. That supported the view that Japan’s rally is increasingly being backed by earnings rather than only currency weakness or speculative AI buying.
Chip-related shares led the market. Advantest rose more than 5%, Kioxia Holdings jumped about 10%, and Ibiden gained nearly 10%. Their gains showed that investors were again willing to add exposure to AI servers, memory, chip testing, substrates and high-performance computing supply chains.
Advantest remained a key Nikkei driver because of its large influence on the price-weighted index and its position in advanced chip testing. The stock’s rise suggested that investors are regaining confidence that AI-related semiconductor demand will continue supporting equipment orders and earnings.
Kioxia’s rebound was especially important because the memory-chip maker had become one of Tokyo’s most volatile stocks during the late-July correction. Its strength on August 13 indicated renewed confidence in high-bandwidth memory, AI servers and data-center demand, although investors remain alert to large speculative positions and the risk of sudden profit-taking.
Ibiden’s gain reflected continuing demand for advanced packaging and chip-substrate technology. As AI processors become more complex and power-hungry, investors are placing greater value on companies that supply the materials and components needed to connect processors, memory and power systems.
Murata Manufacturing and other electronic-component names also benefited from the technology rebound. Component makers have become important second-wave AI stocks because data centers, servers and communications equipment require increasingly sophisticated power, connectivity and sensor systems.
Fujikura and Furukawa Electric remained central to the data-center infrastructure story. Demand for optical fiber, high-speed networks, power cables and related systems continues to support the broader AI investment theme, even as investors become more selective about valuations.
Toppan Holdings surged about 14% after reporting that first-quarter net profit more than doubled from a year earlier. The move showed that earnings surprises remain an important driver of individual stocks, especially as investors rotate away from broad themes and back toward company-specific fundamentals.
Financial shares also advanced, with Mitsubishi UFJ Financial Group and Mizuho Financial Group gaining. Banks remained supported by expectations that Japan’s interest-rate environment will continue to normalize, improving lending margins and investment income after decades of ultra-low rates.
The TOPIX’s record high reflected that broader strength. Financials, materials and other value-oriented shares have helped stabilize the market during periods when the Nikkei’s technology components were volatile. Their participation on August 13 suggested that investors are again willing to buy Japan as a wider earnings and policy story, not only as an AI trade.
The yen remained a central macro risk. The dollar traded around 159.33 yen, leaving the Japanese currency stronger than its late-July lows near 164 but still weak enough to keep imported inflation pressure in focus. The yen’s failure to strengthen more decisively after suspected joint U.S.-Japan intervention has kept markets focused on the BOJ’s next move.
Currency weakness remains a double-edged force for equities. Exporters benefit when overseas earnings are converted into yen, but households and import-dependent companies face higher costs for energy, food, raw materials and consumer goods.
The yen’s level is now closely tied to expectations for monetary policy. A move back toward 160 to the dollar would likely revive speculation over additional intervention and increase pressure on the BOJ to raise rates sooner. A sustained move closer to 155 would ease household inflation pressure but could reduce the earnings tailwind for exporters.
Japan’s bond market continued to price in a more hawkish BOJ path. Shorter-dated yields have risen as investors bring forward expectations for another rate increase, while longer-term yields remain sensitive to fiscal policy, inflation and the government’s spending plans.
The latest inflation data strengthened the case for further tightening. The Bank of Japan’s producer price index rose 7.2% in July from a year earlier, only slightly slower than June’s 7.3% increase and still high enough to show that price pressure remains broad across the corporate sector.
The BOJ data showed that nonferrous metal prices rose 40.6% from a year earlier, while chemical product prices increased 12.9%. The yen-based import price index rose 29.1%, showing how currency weakness continues to raise the cost of imported goods even after oil prices eased from July’s peak.
Those figures matter because wholesale inflation can eventually flow into consumer prices. Companies may initially absorb higher input costs, but if raw materials, metals, energy and import prices remain elevated, more of the burden is likely to be passed on to households.
Tokyo consumer inflation has already shown signs of re-acceleration. Core inflation in the capital reached 1.9% in July, indicating that companies are steadily passing higher costs on to consumers. The BOJ is watching this closely as it assesses whether inflation is becoming more embedded.
The central bank kept its policy rate at 1% at its July 30-31 meeting, but its communication has become more hawkish. Board member Hajime Takata dissented in favor of a hike to 1.25%, and the BOJ warned that underlying inflation could exceed its 2% target.
Reuters reported that markets increasingly expect the BOJ to raise rates at its September 17-18 meeting. That expectation has been reinforced by the weak yen, elevated wholesale inflation, stronger corporate price-setting and recent U.S. comments suggesting support for earlier Japanese tightening.
The government’s position is also being watched closely. Reports that Prime Minister Sanae Takaichi’s administration may support a near-term rate hike have reduced concern that political pressure will prevent the BOJ from normalizing policy. However, markets still want evidence that any policy move will be based on domestic inflation and wage conditions rather than foreign pressure or currency defense alone.
For households, the price environment remains difficult. Wage growth has improved, and recent real-wage data have been encouraging, but consumers continue to face higher costs for food, fuel, electricity, transport and services. The producer-price data suggest that more cost pressure could still be moving through the pipeline.
TV Tokyo’s broader business focus remains relevant to the market story. Households are increasingly judging the economy by whether wage gains actually cover daily expenses, while companies are deciding how much of their higher labor, energy, logistics and materials costs can be passed on to customers.
Businesses with pricing power, strong brands or essential products are being rewarded by investors. Companies that cannot raise prices without losing customers remain vulnerable to margin pressure. That distinction is shaping the rotation between consumer staples, services, logistics, retailers and manufacturers.
The government is trying to support consumers while also maintaining investor confidence. Measures linked to food prices and consumption-tax relief remain part of the political debate, but any large household-support package would raise questions over replacement revenue and fiscal discipline.
Prime Minister Takaichi’s longer-term growth strategy calls for more than 370 trillion yen in public and private investment through fiscal 2040. The plan targets semiconductors, artificial intelligence, energy security, defense, shipbuilding, robotics, space and other strategic industries.
That strategy supports many of the sectors rising in the stock market, including semiconductor equipment, materials, optical fiber, power systems, data centers and advanced manufacturing. The challenge is whether the government can promote investment without adding pressure to bond yields or weakening confidence in fiscal sustainability.
Oil prices eased on August 13, providing some relief after the volatility of July and early August. Brent crude slipped to about $88.80 a barrel, while U.S. crude traded around $82.96. The decline reflected weaker demand expectations after a surprise increase in U.S. crude inventories and lower consumption forecasts from OPEC and the International Energy Agency.
For Japan, oil below $90 is helpful but not enough to eliminate inflation risk. The country imports most of its energy, and the yen remains weak. Even moderate global crude prices can become expensive in yen terms if the currency stays near 159 to the dollar.
The Middle East also remained a source of uncertainty. U.S.-Iran peace efforts appeared stalled, and disputes over the Strait of Hormuz continued. Any renewed disruption to shipping routes could quickly push energy prices higher and revive inflation fears in Japan.
The global backdrop was generally supportive for risk assets. U.S. consumer prices rose only 0.1% in July, cooling expectations that the Federal Reserve would raise rates in September. Money markets reduced the probability of a September Fed hike, helping technology shares and Asian equities.
South Korea’s Kospi rose strongly, with Samsung Electronics and SK Hynix leading gains. That helped Japanese semiconductor shares because overseas investors increasingly treat Japan, South Korea and Taiwan as connected parts of the AI and memory-chip supply chain.
Hong Kong and mainland Chinese shares also rose modestly, while U.S. futures were little changed. The overall tone was constructive, but investors remained focused on U.S. producer-price data, oil prices and whether AI-related earnings can continue justifying elevated valuations.
What to watch next: whether the Nikkei can hold above 68,000 and move toward the 69,000 level, whether TOPIX can extend its record high, and whether the rebound in Advantest, Kioxia, Ibiden and other AI-related stocks continues without triggering renewed profit-taking.
Investors will also monitor whether the yen weakens through 160 to the dollar. Such a move would test the effect of recent intervention and could strengthen expectations for a BOJ rate increase in September.
The two-year and five-year JGB yields will remain key policy signals. Further increases would show that markets are pricing in faster BOJ normalization, while a retreat would suggest investors are waiting for more evidence from wages, consumer prices and BOJ officials.
Other key indicators will be Brent crude near $90, the U.S. producer-price report, South Korean semiconductor shares and additional Japanese earnings revisions. August 13 showed that Tokyo’s rally is broadening again, but the next stage depends on whether AI strength, earnings upgrades, currency stability and BOJ policy can remain aligned.
