TOKYO - Tokyo stocks surged on October 5, with the Nikkei 225 closing at 69,947, up 1,637 points, after briefly recovering the 70,000 level for the first time in about three months, as weak U.S. jobs data reduced expectations for an October Federal Reserve rate hike and buying spread through artificial intelligence and semiconductor-related shares.
The broader TOPIX rose 54.22 points to 4,145.22, showing that the rally was not limited to the price-weighted Nikkei. However, the day’s strongest momentum was concentrated in AI, semiconductor, electronic-component and high-priced growth names, which have again become the main drivers of Tokyo’s market.
The Nikkei opened sharply higher and quickly moved into a powerful risk-on pattern. During the morning session, the index briefly rose above 70,000, recovering that level during trading hours for the first time in about three months. Profit-taking emerged later, but the index still closed just below 70,000 at 69,947.
The rally followed the release of weaker-than-expected U.S. employment data at the end of last week. The slowdown in U.S. job growth led investors to scale back expectations that the Federal Reserve will raise rates again at its October meeting, easing pressure on global growth shares.
The shift in Fed expectations gave investors a reason to return to AI and semiconductor shares. These stocks are sensitive to interest rates because much of their valuation depends on future earnings growth. When rate-hike expectations fall, investors become more willing to buy high-growth technology names.
The U.S. market provided the first push. American technology shares rose after the jobs data, and that momentum carried into Tokyo. Semiconductor, AI and electronic-component shares drew heavy buying from the opening bell.
Tokyo Electron, Advantest, SoftBank Group, TDK and other AI-linked names were central to the advance. Investors bought companies tied to advanced chipmaking equipment, chip testing, electronic components, data-center infrastructure and AI platforms.
Tokyo Electron rose strongly as investors returned to semiconductor-equipment shares. The company remains one of Japan’s most important players in global chipmaking and a key gauge of confidence in AI-related capital investment.
Advantest also gained, benefiting from renewed demand for stocks linked to advanced AI chip testing. Because of its heavy weighting in the Nikkei, the stock’s movement has an outsized impact on the headline index.
SoftBank Group rose as investors again bought Tokyo’s most visible proxy for global AI investment. The company remains closely watched because of its exposure to OpenAI, Arm, robotics, digital infrastructure and other large-scale technology platforms.
TDK and other electronic-component shares also attracted buying. Demand for AI servers, data centers, communications systems and advanced devices continues to support the broader component supply chain.
Kioxia Holdings remained an important gauge of memory-sector confidence. The stock rose only modestly compared with some other AI names, reflecting continued caution after its sharp swings earlier this year. Even so, its participation helped support the broader AI trade.
The October 5 session showed that Tokyo’s market remains highly responsive to the global AI cycle. When U.S. technology shares rise and rate fears ease, Japanese semiconductor and AI infrastructure names can climb quickly because they sit at key points in the global supply chain.
The rally also came as crude oil futures fell, helping investor sentiment. Lower oil prices reduce inflation pressure and ease concerns over energy costs for households and companies.
For Japan, lower oil is especially important because the country imports most of its energy. Cheaper crude helps reduce pressure on gasoline, electricity, aviation fuel, shipping, logistics, chemicals and manufacturing.
Still, oil remains high enough to matter. Any renewed Middle East escalation or disruption to shipping routes could quickly revive inflation concerns, especially while the yen remains weak.
The yen weakened slightly from the end of last week, with the dollar trading around the 158-yen range. The move reflected the view that U.S. interest rates may not rise immediately in October, but that the broader U.S. tightening path is not finished.
A weak yen supports exporters by increasing the yen value of overseas earnings. It helps automakers, machinery makers, electronics companies and precision-equipment manufacturers.
However, yen weakness remains a burden for households and importers because it raises the cost of energy, food, raw materials and consumer goods. That keeps currency policy and inflation pressure central to Japan’s market outlook.
The Bank of Japan remains a major focus after raising its policy rate to 1.25% in September. The rate hike was an important step in normalization, but the yen has remained weak because investors judged the BOJ’s guidance as cautious.
The market now wants to know whether the BOJ will move again in October, December or early 2027. A faster tightening path would support the yen and help contain import inflation, but it could also push Japanese government bond yields higher and pressure equities.
A slower path would support equities in the short term but could leave the yen weak and keep imported inflation alive. This is the policy dilemma facing the BOJ and the government as the market begins the first full week of October.
BOJ Deputy Governor Shinichi Uchida added another layer to the discussion on October 5, saying the global AI boom may have eased financial conditions by boosting demand and asset prices, while warning of market risks if expected profits fail to materialize.
His comments were important because they connected the AI rally directly to monetary-policy conditions. If AI-related asset gains make financial conditions easier, the BOJ may need to consider that effect when judging inflation, investment and the neutral rate.
At the same time, Uchida’s warning reflected a risk that investors have been discussing for weeks: the AI trade remains powerful but vulnerable. If earnings do not justify expectations, or if data-center bottlenecks, power constraints, regulation or safety concerns slow investment, the market could face a sharp pullback.
That risk did not stop buying on October 5. The immediate market reaction was dominated by Fed pause hopes, lower oil and a strong U.S. technology lead. But the BOJ’s warning suggests policymakers are watching the AI boom carefully.
The week ahead will test whether the rally can broaden and hold. The Nikkei is now close to 70,000 again, and investors will be watching whether it can close above that level or whether profit-taking appears as it did during several September rallies.
The first key domestic event is Prime Minister Sanae Takaichi’s policy message at the start of the week. Investors will look for details on household relief, fiscal discipline, defense spending and strategic investment.
The government’s growth strategy remains central to market sentiment. It calls for large-scale public and private investment through fiscal 2040 in semiconductors, artificial intelligence, energy security, defense, shipbuilding, robotics, space and other strategic sectors.
That agenda supports many of the stocks that led the October 5 rally. Chip equipment, advanced materials, electronic components, optical networks, data-center infrastructure and power systems all sit inside Japan’s strategic growth story.
However, the same agenda raises fiscal questions. Higher interest rates have increased government debt-servicing costs, and investors want evidence that Japan can fund household support and industrial policy without undermining fiscal credibility.
Japanese government bond yields therefore remain a key risk. The 10-year yield has recently been near multi-decade highs, while super-long yields remain under pressure. A stable bond market would support the equity rally, but a renewed yield rise could pressure high-valuation technology stocks.
Banks and insurers will also remain important this week. Higher interest rates can improve lending margins and investment income, but financial shares may struggle if bond yields move too abruptly or if investors decide that the BOJ will move more slowly than expected.
The Reuters Tankan and wage data due this week will help shape expectations for the BOJ’s next move. If corporate sentiment and wages remain firm, investors may raise expectations for another rate hike. If the data weaken, the BOJ may be seen as having more room to wait.
Japan’s official BOJ Tankan released last week showed large manufacturers’ sentiment rising to 24 from 22, the sixth straight monthly improvement in business sentiment. That resilience supports the case that corporate Japan is still benefiting from technology demand, higher pricing power and solid overseas earnings.
The week also brings current-account data, household spending figures and machine-tool orders. These will help show whether Japan’s recovery is broadening beyond export and AI-related sectors.
Household spending will be especially important because consumers remain under pressure from high prices. Wage growth has improved, but households continue to face elevated costs for groceries, gasoline, electricity, transport and services.
If household spending remains weak, it will raise questions about whether wage gains are sufficient to sustain consumption. If spending improves, it would support the BOJ’s view that Japan is moving toward a more durable wage-price cycle.
Machine-tool orders will be watched as a guide to manufacturing investment. Strong orders would support the case that companies are still investing in automation, semiconductors, electric vehicles, AI infrastructure and advanced production systems.
Fast Retailing’s earnings on October 8 will also be a major domestic focus. The company is one of the Nikkei’s largest components, and its results can influence both retail-sector sentiment and the headline index.
Investors will watch Fast Retailing for signs of how consumer demand, overseas sales, currency effects and cost pressures are affecting Japan’s largest apparel retailer. Its guidance may also shape views on domestic consumption and Asian retail demand.
Overseas, the Federal Reserve’s September meeting minutes will be released this week. They will be closely read because the Fed raised rates in September but now faces a weaker jobs backdrop.
Markets have sharply reduced expectations for an October Fed rate hike, but investors still see a possible December move. The minutes will help clarify how concerned Fed officials are about inflation, oil prices, financial conditions and labor-market weakness.
For Japan, the Fed path matters directly through the yen. If investors conclude that the Fed is closer to pausing, the dollar may weaken and the yen could recover. If the minutes suggest further tightening remains likely, the dollar may stay strong and keep pressure on the yen.
The dollar-yen rate near 158 remains the most important domestic market signal. Further weakness toward 160 would support exporters but revive intervention and imported-inflation concerns. A rebound toward 153 would ease import costs but could pressure exporters and carry trades.
Oil is the second major signal. A sustained fall in crude would help households, companies and the trade balance. A renewed surge would increase inflation pressure and complicate BOJ policy.
AI and semiconductor shares are the third signal. If Tokyo Electron, Advantest, SoftBank Group, TDK, Kioxia, Ibiden, Fujikura, Furukawa Electric, Murata Manufacturing, Taiyo Yuden, Lasertec and Kokusai Electric continue rising, the Nikkei may make another attempt to close above 70,000.
If profit-taking hits those names, the index could struggle despite support from exporters and value shares. The Nikkei remains heavily influenced by a small group of high-priced technology stocks.
TOPIX’s performance will show whether the rally is broadening. A strong TOPIX would indicate buying in banks, insurers, exporters, trading houses, retailers and domestic-demand names. A weak TOPIX would suggest the market is again relying too heavily on AI and semiconductor shares.
The October 5 rally was a powerful start to the week, but it also raised the bar for the rest of the market. The Nikkei is now just below 70,000, and investors will need fresh confirmation from U.S. rates, Japanese wages, corporate earnings, oil prices and BOJ signals to justify another leg higher.
For now, the market’s message is clear: investors are willing to buy Japan again when Fed pressure eases and AI momentum returns. The test this week is whether that enthusiasm can survive the return of hard data, policy speeches and earnings guidance.
