TOKYO - Tokyo stocks rebounded on August 20, with the Nikkei 225 closing at 66,216.79, up 890.37 points, or 1.36%, as gains in U.S. equities, a sharp rally in South Korean semiconductor shares and easing global bond-market stress encouraged investors to buy back Japanese shares after two days of heavy selling.
The broader TOPIX rose 47.42 points, or 1.18%, to 4,059.73, marking its first gain in four sessions. Prime Market trading value totaled about 8.6034 trillion yen, with volume of 2.25115 billion shares. Market breadth was strong, with 1,320 stocks rising, 204 falling and 32 unchanged.
The rebound followed a steep selloff on August 19, when the Nikkei dropped 3.2% to its lowest close since August 4 as artificial intelligence and semiconductor-related shares were hit by rising bond yields, higher oil prices and risk-off sentiment. The August 20 recovery showed that investors were willing to buy the dip, but the advance also revealed continued caution toward some AI-linked names.
Nikkei CNBC-style market commentary centered on a relief rally driven by three factors: Wall Street’s recovery, South Korea’s semiconductor rebound and a pause in the global bond selloff. Investors bought Nikkei futures and large liquid stocks after U.S. long-term yields fell and Asian risk appetite improved.
The U.S. Treasury’s decision to raise the cap on debt buybacks helped calm bond markets after long-term yields had climbed sharply. Lower U.S. yields supported equities by reducing pressure on valuation multiples, especially for technology and growth stocks that had been hurt by rising discount rates.
South Korea also provided a major tailwind. The Kospi surged as SK Hynix and Samsung Electronics rallied after news of large-scale share buybacks and improved investor sentiment toward memory-chip shares. That encouraged overseas short-term investors to rebuild positions in Tokyo, where semiconductor and AI-related stocks have been moving closely with Korean chipmakers.
The Nikkei’s gain reached nearly 1,000 points at one stage, helped by short-covering and bargain buying after the index had fallen nearly 3,900 points over the previous two sessions. However, the market lost some momentum above the 66,000 level, where investors took profits and sold into the rebound.
That hesitation showed that confidence in the AI trade has not fully recovered. The Philadelphia Semiconductor Index fell in the previous U.S. session, and some Japanese AI and semiconductor-related stocks remained weak even as the overall market rose.
Tokyo Electron, Ibiden and SCREEN Holdings were among the AI and semiconductor-related shares that stayed under pressure. Their weakness suggested that investors remain concerned about valuations, capital-spending expectations and the possibility that recent rallies in chip equipment and AI infrastructure stocks had run too far.
Chiba Bank Asset Management’s Jun Morita was quoted by NQN as saying that the sluggish recovery in some AI semiconductor-related stocks was a concern. That view captured the market’s divided tone: the index rebounded strongly, but the quality of the rebound was not uniform.
SoftBank Group and Kioxia Holdings rose, helping support the Nikkei. SoftBank remains one of Tokyo’s most important proxies for global AI investment sentiment because of its exposure to OpenAI, robotics, digital infrastructure and large-scale technology themes. Kioxia remains a barometer of confidence in AI servers, high-bandwidth memory and data-center demand.
Kioxia’s recovery was important because the stock had been among the hardest hit during the latest AI selloff. Its rebound helped stabilize sentiment toward memory shares, although investors remain alert to the risk of speculative flows and margin-financed positions amplifying volatility.
Automakers also attracted buying after reports of possible U.S. tariff reductions. Toyota Motor and Honda Motor rose, supported by the possibility that lower trade barriers could ease pressure on Japanese vehicle exports. The move showed that investors were again willing to buy exporters when company-specific policy risks appeared to improve.
The auto sector remains sensitive to both currency and tariff policy. A weaker yen supports overseas earnings, but trade restrictions can squeeze margins if companies are unable to pass costs on to consumers. Any reduction in U.S. tariff pressure would be positive for Toyota, Honda and other manufacturers with large exposure to the American market.
Nonferrous metal shares were another area of strength. Sumitomo Metal Mining and related materials stocks rose as investors returned to companies linked to electrification, batteries, data centers, defense, energy infrastructure and global capital spending.
Banks moved in the opposite direction. Mitsubishi UFJ Financial Group, Sumitomo Mitsui Financial Group and other financial shares fell as long-term yields eased. Banks had benefited from rising Japanese government bond yields and expectations of Bank of Japan rate increases, so the retreat in yields prompted profit-taking.
The move in banks showed how quickly rate expectations are affecting sector rotation. Higher yields can improve lending margins and investment income, but they can also create valuation losses on bond holdings. When yields fall, investors often reduce bank exposure and rotate back toward growth, technology and cyclical shares.
Murata Manufacturing and Kyocera fell, reflecting continued caution toward some electronic-component names. Component makers have benefited from AI servers, data centers and advanced electronics demand, but investors have become more selective after sharp gains earlier in the year.
The yen remained near the center of the market narrative. The dollar traded around the upper 158-yen range to about 159 yen, leaving the currency stronger than its late-July lows near 164 but still weak enough to keep imported inflation pressure in focus.
A weak yen remains a double-edged factor for Japanese equities. It supports exporters by lifting the yen value of overseas earnings, but it raises costs for imported fuel, food, raw materials, chemicals and consumer goods. For households, the yen’s weakness is felt directly through gasoline, electricity, groceries and imported daily products.
The Ministry of Finance’s July trade data highlighted that pressure. Exports rose 23.2% from a year earlier, supported by a weak yen and strong semiconductor-related demand, but imports rose 27.8% as energy costs climbed. Japan recorded a trade deficit of 634.5 billion yen.
The data showed both sides of Japan’s current economic story. AI-linked demand and currency weakness are supporting export values, but the same weak yen and elevated oil prices are pushing import costs to painful levels for households and companies.
Reuters reported that Japan’s imports hit a monthly record in July, while exports also reached an all-time high. The result suggests that trade is expanding rapidly in value terms, but not necessarily in a way that improves household welfare or reduces inflation pressure.
For the Bank of Japan, the trade figures complicate the policy outlook. Strong exports and semiconductor demand support the argument that Japan’s corporate sector remains resilient, while record imports and weak-yen inflation strengthen the case for another rate increase.
At the same time, domestic demand remains fragile. Recent GDP data showed that Japan’s economy grew for a third straight quarter in April-June, but private consumption fell slightly and capital spending declined. That makes the BOJ’s decision more difficult because imported inflation is rising even though household spending remains weak.
Japanese government bond markets steadied after the U.S. Treasury’s buyback announcement helped ease pressure on global yields. Super-long Japanese yields fell, with the 40-year yield down sharply and the 30-year yield also lower. The move helped calm immediate concern that Japan’s bond market was entering a destabilizing phase.
Even so, the benchmark 10-year JGB yield remains close to the psychologically important 3% level after reaching its highest level in about three decades earlier this week. Investors continue to watch whether fiscal concerns, inflation risks and expectations for BOJ tightening push yields higher again.
The 3% level matters because it would mark a major shift in Japan’s financial environment after decades of low rates. Higher yields raise government debt-servicing costs, affect equity valuations and increase pressure on fiscal policy.
Reuters has reported that Japan has few easy answers as the bond selloff threatens fiscal plans. The government’s baseline estimate assumes the 10-year yield will climb to 3.6% in fiscal 2029, with debt-servicing costs rising to 41 trillion yen that year.
Prime Minister Sanae Takaichi’s administration 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 strategy supports many of the companies leading Japan’s stock market, including semiconductor equipment makers, materials suppliers, AI infrastructure firms, cable makers and advanced manufacturers. But rising yields make investors more sensitive to how the government will fund its investment and household-support programs.
Household relief remains a major political issue. The government has discussed food-related support and tax relief to cushion consumers from higher prices. Such measures could help consumption, but they would also raise questions about revenue replacement and fiscal discipline if they increase borrowing.
TV Tokyo’s broader business themes remain central to the August 20 market story: higher wages are helping some households, but food, energy, transport and service prices remain difficult. Companies are still deciding how much of their higher labor, logistics, energy and materials costs can be passed on to consumers.
Businesses with pricing power and stable demand remain better positioned. Companies without pricing power face margin pressure, especially if the yen stays weak and oil prices remain high.
Oil remained an important external risk. Brent crude was trading around the low-$90 range earlier in the week, although global energy prices eased somewhat as bond-market relief improved risk appetite. For Japan, oil near $90 remains uncomfortable because the country imports most of its energy.
Higher oil prices raise costs for gasoline, electricity, airlines, logistics, utilities, chemicals and manufacturing. The impact is amplified by a weak yen because energy imports are priced largely in dollars.
The global backdrop was more supportive than on August 19. U.S. stocks rose after the Treasury’s buyback plan helped reduce long-term yields, and Asian equities strengthened as investors returned to risk assets. South Korea’s Kospi was particularly strong, giving Tokyo additional support through the semiconductor channel.
However, the broader global picture remained fragile. Federal Reserve minutes showed concern about inflation, and investors continued to watch whether U.S. policymakers could still lean toward additional tightening if price pressure does not ease. That matters for Japan because higher U.S. yields support the dollar and make it harder for the yen to recover.
The Middle East conflict also remains a risk for Japan. Any renewed disruption to shipping routes around the Strait of Hormuz or the Red Sea could push oil higher again and revive the imported inflation shock that unsettled markets in July.
What to watch next: whether the Nikkei can hold above 66,000 after the August 20 rebound, whether TOPIX can continue recovering above 4,000, and whether the rally broadens beyond short-covering and futures-led buying.
Investors will also watch whether AI and semiconductor shares regain momentum. SoftBank Group and Kioxia rose, but the weakness in Tokyo Electron, Ibiden and SCREEN Holdings showed that confidence in the sector is still uneven.
The yen near 159 to the dollar remains a key risk. A move back above 160 would revive intervention speculation and strengthen expectations that the BOJ could raise rates at its September 17-18 meeting.
The 10-year JGB yield’s distance from 3% will also be critical. If yields resume rising, pressure could return to banks, growth stocks, fiscal policy and the broader market. If yields continue to ease, investors may regain confidence in risk assets.
Other key indicators will be Brent crude near $90, South Korean semiconductor shares, U.S. bond yields, Federal Reserve signals and Japan’s next inflation data. August 20 showed that Tokyo can rebound sharply when global yields fall and Korean chip shares recover, but the market remains vulnerable to renewed AI selling, yen weakness and another rise in bond yields.
