Japan Stock of the Day

On September 18, 2026, the most talked-about Japanese stock online was Kioxia Holdings <285A>.
Background: The Bank of Japan raised its policy interest rate by 0.25 points to around 1.25% at its monetary policy meeting that day. The Nikkei Stock Average closed up 882.70 yen at 65,018.95 yen, having risen more than 1,300 yen at one point during the session. Amid heavy buying of semiconductor-related shares, Kioxia surged 4,690 yen (+9.40%) to close at 54,570 yen, becoming one of the top contributors to the Nikkei's gain. Trading volume reached 34.47 million shares and turnover hit 1.8189 trillion yen, standing out as the largest turnover on the Tokyo Stock Exchange Prime Market that day.

On September 17, 2026, the most talked-about Japanese stock online was Leopalace21 <8848>.
Background: Since the September 15 announcement of a tender offer (TOB) by Hikari Tsushin and others at 1,000 yen per share, the stock has surged over three trading days from the 600-yen range it traded at before the announcement, closing today up 119 yen (+12.65%) at 1,060 yen. Buying pushed the price above the 1,000-yen offer price, with trading volume reaching 37.35 million shares and turnover of 38.3 billion yen. A market price above the tender offer price suggests investors are pricing in the possibility of a rival bid or an increase to the offer price, and the stock's movement continues to draw attention.

On September 16, 2026, the most talked-about Japanese stock online was Mercari <4385>.
Background: It topped the Tokyo Stock Exchange Prime Market's list of decliners, closing down 246 yen (-6.36%) at 3,621 yen. The stock has fallen about 29% over the past month from its year-to-date high of 5,111 yen set on August 10. On September 15, Mercari announced a temporary ban on listing popular items including unopened "Pokemon Card Game 30th CELEBRATION" packs, seen as an anti-resale and anti-fraud measure. However, selling pressure mounted as this came on top of a string of headwinds since early September: accusations of fraudulent listings, rumors of money laundering circulating online, and a rating downgrade to "neutral" by Macquarie. The company's underlying results remain strong, with record profit for the fiscal year ended June 2026.

On September 15, 2026, the Japanese stock most talked about online was Leopalace21 <8848>. Background: Hikari Tsushin, together with MBK Partners and a fund affiliated with NEC Capital Solutions, announced a tender offer (TOB) for Leopalace21 at 1,000 yen per share, worth up to 267.6 billion yen in total. The offer price represents a premium of about 45% over the previous closing price, and Leopalace21 said it recommends shareholders tender their shares. The stock responded with buy orders piling up at the daily limit, closing up 100 yen (+14.47%) at 791 yen, a new year-to-date high. The tender offer period is scheduled to run from September 15 to the end of October.

On September 14, 2026, the Japanese stock most talked about online was Airtrip <6191>. Background: it topped the Tokyo Stock Exchange Prime Market's list of gainers, closing up 592 yen (+55.17%) at 1,665 yen with buy orders piling up at the daily limit. Sustained buying was driven by the September 10 announcement of an upward revision to its fiscal year 2026 (ending September) consolidated net profit forecast, from 600 million yen to 1.95 billion yen (a 3.3-fold increase), a plan to sharply raise the year-end dividend from 10 yen to 160 yen, and attention to its share buyback allowance. Trading volume reached 9.1 million shares, turnover was 15.3 billion yen, and market capitalization stood at 37.9 billion yen.

On September 11, 2026, the most talked-about Japanese stock online was AirTrip <6191>.
Background: Buying continued on the upward earnings revision and sharply higher dividend announced on September 9 for the fiscal year ending September 2026, and the stock hit its daily limit for a second straight session. The company raised its full-year net profit forecast to 1.95 billion yen, 3.3 times its previous projection. The dividend, previously undecided, was set at 160 yen for the year-end with no interim payment, a 150 yen increase from 10 yen a year earlier, or 16 times in a single year. For the fiscal years ending September 2026 through 2028 it has adopted a policy of paying out 100% of after-tax operating profit as the annual dividend, aiming for operating profit of 5 billion yen. From the fiscal year ending September 2029 it plans to enter an investment phase and return the dividend to the previous level of 10 yen. The record date is September 30, and based on the September 10 close of 923 yen the yield was 17.33%. The stock closed on September 11 at 1,073 yen, up 150 yen (+16.25%), the top gainer on the Tokyo Stock Exchange Prime Market.

On September 10, 2026, the most talked-about Japanese stock online was Daiwa Motor Transportation <9082>.
Background: A capital and business alliance with Daiwa House Industry <1925>, announced on September 9, drew buying. The company will raise about 1 billion yen through a third-party allotment at an issue price of 2,040 yen per share, and Daiwa House Industry will become its largest shareholder with 9.76% of shares outstanding. By working with Daiwa House Industry, which has strong property development capabilities and extensive knowledge of real estate utilization, the company aims to make effective use of the real estate assets it holds, raise the value of its existing properties, and advance studies of future redevelopment and higher-intensity use. On September 10 the stock ranked high in pre-opening buy order rankings and was bid-only at its daily limit as of 10:21 a.m. It closed at 2,537 yen, up 500 yen (+24.55%), the second-largest percentage gain across all markets.

On September 9, 2026, the most talked-about Japanese stock online was Albis <7475>.
Background: On September 8 the company announced it supported and recommended shareholders tender into a takeover bid by Life Corporation <8194>. The offer price is 3,780 yen per share, a 51.14% premium to the closing price on the day before the announcement. Life plans to buy about 6.97 million shares with a minimum threshold of 4.17 million shares (49.92%), for a total of roughly 26.3 billion yen. The tender period runs from September 9 to November 10, a span of 40 business days, with settlement starting November 17. If the bid succeeds, Albis is expected to be delisted through a share consolidation, and its shareholder benefit program will be discontinued. Mitsubishi Corporation, which holds 16.62%, will not tender. Life is seeking synergies such as store expansion, a broader product lineup and efficiency gains from shared logistics. The stock traded bid-only at its daily limit and closed at 3,000 yen, up 500 yen (+20.00%), the top gainer on the Tokyo Stock Exchange Prime Market.

On September 8, 2026, the most talked-about Japanese stock online was WITZ <4440>.
Background: A disclosure released by the company at 8:50 a.m., titled "Launch of research and development on safety and assurance technology supporting the social implementation of physical AI," drew buying. Its research theme, "research and development of safety assurance technology and security countermeasure technology to accelerate the social implementation of physical AI," was selected under the Small and Medium Enterprise Agency's Go-Tech program. The company will serve as project leader and advance the work through industry-academia-government collaboration, aiming to establish and commercialize foundational technology for operating physical AI continuously and safely in the real world. Envisaged application fields include automobiles, collaborative robots, construction and aerospace. The stock surged on the disclosure and was locked at its daily limit from the morning session, closing at 2,014 yen, up 400 yen (+24.78%), the top gainer on the Tokyo Stock Exchange Standard Market.

On September 7, 2026, the most talked-about Japanese stock online was Kioxia Holdings <285A>.
Background: A surge in memory-related shares in the U.S. market on September 4 carried over to Tokyo. Micron Technology rose 6% after announcing a plan to double its high bandwidth memory (HBM) production capacity, and SanDisk, which operates plants jointly with Micron, jumped about 12%, while the Philadelphia Semiconductor Index gained 3.38%. Although U.S. stocks overall were soft as stronger-than-expected employment data raised expectations of a September rate hike, semiconductor shares were bought, led by memory names. Asian markets were also firm, with the KOSPI and Taiwan's weighted index rising, and money flowed into the semiconductor sector. The stock climbed to 58,250 yen (+6.96%) as of 10:34 a.m. and closed at 59,530 yen, up 5,070 yen (+9.31%), ranking third among gainers on the Tokyo Stock Exchange Prime Market.

On September 4, 2026, the most talked-about Japanese stock online was SoftBank Group <9984>.
Background: Buying was driven by news that OpenAI had begun providing its new AI model "GPT-6 Astra" to a limited group of companies, seen as the first major update to its foundation technology since August 2025. More than 70% of SoftBank Group's holdings are accounted for by OpenAI and Britain's Arm Holdings, and a rise in Arm shares, together with gains in U.S. technology stocks as expectations for an early rate hike receded, added to investor confidence. The stock widened its gains from an opening price of 5,197 yen, reached a high of 5,611 yen and closed at 5,590 yen, up 589 yen (+11.78%), a fourth straight advance. Trading volume swelled to 77.8 million shares and turnover to 423 billion yen, with a market capitalization of 31.93 trillion yen. The stock alone lifted the Nikkei Stock Average by 461 points, and the index rebounded for the first time in five sessions.

On September 3, 2026, the most talked-about Japanese stock online was Nitori Holdings <9843>.
Background: Investors welcomed the August monthly figures released on September 2. Same-store sales rose 4.4% from a year earlier, a second straight monthly gain, with customer numbers up 3.3% and spending per customer up 1.1%. On an all-store basis sales rose 7.1% and customer numbers 7.0%. The company said its summer thanksgiving event, monthly themed sales and television commercials drove solid sales of dining furniture, living room furniture, home appliances and lighting, and bedding. A reversal in the currency market toward a weaker dollar and stronger yen was also viewed as a positive. The stock reached 3,229 yen at 10:36 a.m., up 208 yen from the previous day, and closed at 3,275 yen, up 254 yen (+8.41%), its highest level in about six months, making it the top gainer on the Tokyo Stock Exchange Prime Market even as the Nikkei Stock Average fell 111.16 points.

On September 2, 2026, the most talked-about Japanese stock online was ITO EN <2593>.
Background: Investors welcomed its first quarter results for the fiscal year ending April 2027, covering May through July. Revenue rose 3.3% year on year to 135.18 billion yen and operating profit climbed 22.0% to 10.2 billion yen, reaching 51% of the full-year plan of 20.0 billion yen, already past the halfway mark. Ordinary profit was 10.122 billion yen and net profit 6.559 billion yen. Price revisions carried out at home and abroad worked their way through, and overseas sales of its flagship brand "Oi Ocha" grew. The company is rolling out marketing featuring baseball player Shohei Ohtani and plans to push the global expansion of "Oi Ocha" further. The stock closed at 3,273 yen, up 262 yen (+8.70%), setting a new year-to-date high and ranking as the top gainer on the Tokyo Stock Exchange Prime Market even as the Nikkei Stock Average fell 1,889.70 points in a broad sell-off.

On September 1, 2026, the most talked-about Japanese stock online was Sumitomo Chemical <4005>.
Background: On August 31 the company announced it had established four-inch mass production of InP epitaxial wafers at its Ibaraki Works in Hitachi City, Ibaraki Prefecture, and begun sales. The wafers are a core material for the optoelectronic fusion technology behind AI data centers. Drawing on composition control technology cultivated over more than 25 years in gallium arsenide and gallium nitride, the company aims for sales of about 10 billion yen from this product group by the middle of the 2030s. On September 1 it further announced that it had developed, with Gutenberg, a liquid crystal polymer (LCP) filament and forming technology for 3D printers. It combines light weight with high thermal conductivity and strength comparable to aluminum alloy, with expected uses in semiconductor production components, humanoid-related parts and eVTOL aircraft, and samples will be offered within this year. The stock closed at 620.1 yen, up 47.9 yen (+8.37%), the top gainer on the Tokyo Stock Exchange Prime Market.