TOKYO - Tokyo stocks rose on September 17, with the Nikkei 225 closing at 64,136, up 213.25 points, as investors bought selected technology, pharmaceutical, insurance and consumer-related shares after the Federal Reserve’s rate hike, though gains were capped by a stronger dollar, renewed yen weakness and caution before the Bank of Japan’s policy decision.
The broader TOPIX rose 32.47 points, or 0.80%, to 4,094.19, outperforming the Nikkei and showing firmer support across a wider range of shares. The session marked another day in which investors were willing to buy parts of the Japanese market, but not aggressively enough to push the headline index far above recent technical resistance.
The Nikkei opened sharply higher at 64,643.58, up 720.58 points, after U.S. technology shares showed resilience following the Federal Reserve’s decision. The early strength did not last. The index steadily gave back most of its opening gain as investors digested the Fed’s hawkish message and waited for the BOJ’s September 18 decision.
The market’s intraday movement again showed how difficult it has become for the Nikkei to sustain rallies. Buying appeared quickly when sentiment improved, but investors remained wary of rising U.S. yields, currency volatility, oil prices and the possibility that BOJ Governor Kazuo Ueda may signal further rate increases after this week’s expected hike.
The Federal Reserve raised interest rates for the first time in three years and signaled that another increase may come before the end of 2026. The decision lifted the dollar and short-term U.S. Treasury yields, while keeping global investors cautious toward risk assets.
New Fed Chair Kevin Warsh joined a unanimous decision to raise rates, and officials pointed to persistent inflation risks. Reuters reported that rate futures markets were pricing about a 90% probability of another quarter-point Fed hike by the end of the year.
For Japan, the Fed decision matters directly through the dollar-yen exchange rate, U.S. yields and global technology valuations. A hawkish Fed supports the dollar and can ease pressure on Japanese exporters, but it also raises global discount rates and makes high-valuation growth stocks more vulnerable.
The yen weakened to around 155.50 to 155.98 per dollar after the Fed decision, moving away from the seven-month high of 152.89 reached earlier in September. The currency’s renewed slide reflected the broad rise in the dollar after the Fed’s hike and the market’s view that a BOJ rate increase may already be largely priced in.
Japan’s government responded by stressing currency stability. Chief Cabinet Secretary Minoru Kihara said Japan would continue close communication with the U.S. Treasury and work to maintain an orderly currency market. He said the government’s stance had not changed since the rare joint yen-buying intervention by Japan and the United States at the end of July.
Finance Minister Satsuki Katayama also said Japan had stated its determination to address excessive currency volatility when it launched the joint intervention. She said she expected the BOJ to coordinate closely with the government and conduct appropriate monetary policy to achieve its 2% inflation target.
The comments showed that currency policy remains central to the market. The yen has moved from near 164 in July to around 153 earlier in September and back toward 156 after the Fed, creating a difficult environment for companies and investors.
For exporters, the yen’s renewed weakness is supportive because it increases the yen value of overseas earnings. Automakers, machinery makers, electronic-component suppliers and precision-equipment companies had faced pressure when the yen strengthened quickly, so the move back toward 156 provided some relief.
For households and importers, however, a weaker yen is a problem because it raises the cost of imported energy, food, raw materials and consumer goods. With oil prices still high by historical standards, any renewed yen weakness risks feeding into gasoline, electricity, food distribution and transport costs.
The BOJ is now the central domestic focus. Reuters reported that the central bank is set to raise rates to 1.25% on September 18, the highest level in 31 years, though analysts said the move may not support the yen unless Ueda delivers a hawkish message on the pace of future hikes.
A September hike is largely priced in, so the market reaction will depend on the guidance. Investors will watch whether Ueda presents the increase as a one-off adjustment or signals readiness to keep raising rates as inflation remains elevated.
The BOJ kept its policy rate at 1% at its July 30-31 meeting, but board member Hajime Takata dissented in favor of raising it to 1.25%. Since then, inflation data, stronger wages, revised GDP figures, high producer prices, the trade deficit and currency volatility have all strengthened the case for another increase.
The central bank’s challenge is that it must fight inflation without destabilizing markets. A hawkish message could support the yen and reduce import-cost pressure, but it could also push Japanese government bond yields higher and pressure equities, mortgages, corporate borrowing and government finances.
Japanese government bond yields remain close to multi-decade highs. The 10-year JGB yield recently moved above 3% for the first time since 1996, while super-long yields have stayed elevated. Investors remain concerned about inflation, fiscal sustainability and long-term government financing costs.
Higher yields support banks and insurers by improving lending margins and investment income, but they weigh on high-valuation growth shares by raising the discount rate applied to future earnings. They also increase the government’s debt-servicing costs at a time when fiscal policy is already under close scrutiny.
The sector moves on September 17 reflected that mixed rate environment. Insurance shares were among the stronger groups, supported by higher yields, while pharmaceuticals, other products and selected consumer-related shares also rose.
At midday, Fisco reported gains in SoftBank Group, Fast Retailing, Recruit Holdings, Konami Group, Chugai Pharmaceutical, Bandai Namco Holdings, Toyota Tsusho, Nintendo, BayCurrent, Terumo, Otsuka Holdings, Tokio Marine, Daiichi Sankyo, Fujikura and Shionogi.
The positive list showed that the market’s support was not limited to one theme. Buying appeared in technology platforms, retail, staffing, gaming, pharmaceuticals, trading companies, insurance and selected AI-infrastructure names.
SoftBank Group’s rise helped support the Nikkei. The company remains Tokyo’s most visible proxy for global artificial intelligence investment because of its exposure to OpenAI, Arm, robotics, digital infrastructure and other large-scale technology platforms.
Fast Retailing also supported the price-weighted Nikkei. Its movement often has a major effect on the index, and its gain helped offset weakness in semiconductor-equipment and electronic-component shares.
Nintendo, Konami Group and Bandai Namco Holdings benefited from buying in game-related and entertainment shares. Reuters reported that investors snapped up beaten-down gaming and pharmaceutical stocks as oil prices eased and the Fed decision passed largely as expected.
Pharmaceutical shares were also firm. Chugai Pharmaceutical, Terumo, Otsuka Holdings, Daiichi Sankyo and Shionogi were among the stronger names reported during the session, helping the market broaden beyond AI and exporters.
Insurance shares such as Tokio Marine drew support from the higher-rate environment. Higher yields can improve investment returns for insurers, though rapid yield increases can also create volatility in bond portfolios.
On the weaker side, Fisco reported declines in Advantest, Tokyo Electron, Ibiden, Kioxia Holdings, TDK, Screen Holdings, Murata Manufacturing, Taiyo Yuden, Shin-Etsu Chemical, Sumitomo Metal Mining, Disco, Lasertec, Kyocera, Mitsui Mining & Smelting and Rohm.
The weakness in semiconductor and electronic-component shares showed that the AI trade remained unstable. U.S. technology shares had resisted deeper selling overnight, but investors in Tokyo were still cautious toward chip-related stocks because of rising yields, valuation concerns and uncertainty over future AI investment.
Advantest and Tokyo Electron remained key drags. Advantest is one of Japan’s most direct beneficiaries of advanced AI chip testing, while Tokyo Electron is central to semiconductor manufacturing equipment. Both stocks are highly sensitive to U.S. technology sentiment, global bond yields and expectations for AI capital spending.
Kioxia Holdings remained weak, showing continued caution toward memory-related shares. The company is a key gauge of confidence in high-bandwidth memory, AI servers and data-center storage demand, but its share price has been highly volatile since July.
Ibiden, TDK, Murata Manufacturing, Taiyo Yuden, Lasertec and Rohm also fell, suggesting that investors were still wary of parts of the semiconductor and electronic-component supply chain. These companies remain structurally tied to AI, servers, advanced devices, electric vehicles and data-center investment, but higher rates make valuations harder to support.
The market’s treatment of AI-related shares has become much more selective. Investors still believe in long-term demand for AI processors, memory, optical fiber, power systems, software and data-center infrastructure, but they are no longer willing to buy every related stock regardless of valuation.
The broader AI debate also remains a risk. Recent comments from AI-company leaders about safety and the pace of development have raised questions about whether regulation, ethics, supply constraints, energy consumption or funding costs could slow the investment cycle.
SoftBank’s rebound showed that investors are still willing to buy AI-linked shares when sentiment improves. But weakness in chip and component names showed that confidence is uneven and that the market is separating platform exposure from hardware and supply-chain risk.
Fujikura was among the stronger shares, standing out as an AI-infrastructure name even while several chip-related stocks fell. The company remains tied to optical fiber, cables, high-speed communications and data-center infrastructure, making it part of the second wave of AI investment.
Furukawa Electric, Sumitomo Electric and other infrastructure-related names remain important gauges of whether the AI theme is broadening beyond chips into the physical networks and power systems needed for large-scale data centers.
The September 17 session also reflected the effect of lower oil prices. Fisco said the pullback in crude weighed on mining and oil-related shares, while Reuters reported that easing oil prices helped market sentiment.
For Japan, lower oil is welcome because the country imports most of its energy. A sustained decline would ease pressure on gasoline, electricity, aviation fuel, shipping, logistics, chemicals and manufacturing costs.
However, oil remains high enough to be a serious risk. Earlier this week, Brent crude traded above $100 because of Middle East tensions and shipping concerns. Even a pullback does not remove the burden on households and companies if prices stay elevated.
The latest trade data showed Japan posting a fourth consecutive monthly trade deficit in August as higher oil prices lifted import costs. That external deficit remains a reminder that energy prices and the yen are central to Japan’s inflation outlook.
For households, the issue is simple. Wage growth has improved, but high energy and import costs continue to pressure real purchasing power. Gasoline, electricity, groceries, transport and services remain the key areas shaping consumer sentiment.
For companies, the challenge is whether higher labor, energy, logistics and materials costs can be passed on to customers. Businesses with pricing power, strong brands, recurring demand or exposure to long-term investment remain better positioned, while firms without pricing power face margin pressure.
TV Tokyo’s broader business themes remain closely connected to the market. The domestic economy is improving in some areas, but households are still judging the recovery by whether wage gains cover everyday expenses.
Prime Minister Sanae Takaichi’s government is trying to balance household relief, defense spending, fiscal discipline and long-term industrial investment. The government’s growth strategy 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.
Those priorities support many of the industries investors continue to watch, including chip equipment, advanced materials, optical networks, power systems, data centers and defense-related manufacturers. But rising JGB yields make the funding question more difficult.
The Finance Ministry’s budget process remains under scrutiny because higher assumed interest rates raise projected debt-servicing costs. Investors want evidence that Japan can support households and strategic industries without undermining fiscal credibility.
The market’s technical position also remains important. The Nikkei closed above 64,000, extending its rebound from the 26-week moving-average area that traders had watched closely earlier in the week. However, the failure to hold most of the opening gain showed that overhead resistance remains strong.
The 26-week moving average around the 63,800 area remains a key support line. If the Nikkei can stay above it after the BOJ meeting, investors may see the recent rebound as evidence that medium-term support is holding. If it breaks clearly below that level, traders may interpret it as a sign that the medium-term trend has weakened.
The broader TOPIX’s outperformance was constructive. A stronger TOPIX suggests that investors are buying more than just a few high-priced Nikkei components. However, sector rotation remains unstable, and much depends on the BOJ’s guidance.
The global backdrop remained cautious but not sharply negative. AP reported that Asian shares were mixed after Wall Street slipped following the Fed’s rate-hike decision, with Japan’s Nikkei higher during the session. The Fed’s action was expected, but its hawkish tone kept investors wary.
South Korea and Taiwan remain important reference points for Tokyo’s technology shares. Overseas investors increasingly treat Japanese chip-equipment makers, South Korean memory producers, Taiwanese foundries and U.S. AI shares as one connected technology trade.
When South Korean memory shares rise, Japanese semiconductor names often receive support. When Seoul weakens, Tokyo’s chip complex can quickly come under pressure. On September 17, Japan’s own semiconductor shares remained mixed to weak despite broader market gains.
The dollar’s rise after the Fed also affected regional markets. Reuters reported that the dollar index traded near its strongest level since July 31, while the yen hovered near a two-week low around 156 per dollar.
That currency move sets up a difficult BOJ decision. If the BOJ raises rates but gives cautious guidance, the yen could weaken further. If Ueda signals faster tightening, the yen could strengthen but equities may come under pressure from higher yields.
What to watch next: whether the Nikkei can hold above 64,000 after the BOJ decision, whether TOPIX continues to outperform, and whether buying broadens beyond pharmaceuticals, insurance, gaming and selected technology shares.
Investors will monitor SoftBank Group, Fast Retailing, Advantest, Tokyo Electron, Kioxia, Fujikura, Ibiden, Murata Manufacturing and Taiyo Yuden for signs of whether the AI and technology trade can stabilize after the BOJ meeting.
The yen around 156 to the dollar is the most important domestic market signal. Further weakness would support exporters but revive inflation and intervention concerns. A rebound toward 153 would ease import costs but pressure exporters and carry trades.
The BOJ’s September 18 meeting is the key domestic event. A 25-basis-point hike to 1.25% is widely expected, but Ueda’s comments on December and 2027 will matter more than the rate move itself.
The 10-year JGB yield’s position near 3% and the super-long yield curve will remain critical. A renewed rise would pressure equity valuations and fiscal policy, while a stable retreat would help risk appetite.
Other key factors will be the dollar’s reaction to the Fed, oil prices, Middle East shipping risks, Japanese inflation data, South Korean semiconductor shares, U.S. technology stocks and any further comments from Japan’s government on currency stability.
September 17 showed that Tokyo investors were willing to buy selected shares after the Fed decision, but the market was not strong enough to hold its early surge. The Nikkei’s gain and TOPIX’s stronger rise suggest underlying support remains, but the next direction will depend on whether the BOJ can raise rates without unsettling the yen, bond market or AI-heavy equity trade.
