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A Short Seller's Skin in the Game, and Three Auditors Who Said Not Yet
Gotham City admits it's short Sumitomo Pharma's stock and says the drug's science doesn't hold up; three other issuers just told Tokyo their auditors need more time.
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Tokyo equities advanced while the 10Y JGB yield nudged higher.
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Gotham City Takes Aim at Sumitomo Pharma's Kyoto-Linked Cancer Drug

Sumitomo Pharma Disputes Short-Seller's Image-Duplication Claims on Kyoto-Linked Drug
Sumitomo Pharma used a Tokyo Stock Exchange disclosure on August 12 to reject a short-seller report attacking the research behind Amchepry, one of its approved drugs developed through a long-running collaboration with Kyoto University. The report, published by Gotham City Research LLC under the title "Part II - CiRA, Dr. Yamanaka, and the undisclosed history of image duplication concerns," alleges undisclosed image-duplication problems in the underlying science. Sumitomo Pharma called the report one-sided and said it stands behind the data that supported Amchepry's conditional, time-limited approval.
The catch: Gotham City discloses inside its own report that it holds a short position in Sumitomo Pharma's stock and profits if the shares fall.
What to watch: Sumitomo Pharma says it is weighing legal action against what it calls inaccurate or misleading information about the drug and its approval record.
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Capital Markets & Corporate Moves

DMG Mori Taps Overseas Investors for ¥48.2bn to Fund Poland Plant and Chicago R&D Hub
DMG Mori's board resolved on August 12 to issue 15 million new shares through a public offering in Europe and Asia, excluding the US and Canada, raising roughly ¥48.5bn before costs and about ¥48.2bn after issuance expenses. The sale lifts outstanding shares from 142.3mn to 157.3mn. What the money buys: An expanded casting-parts plant in Poland, a new R&D centre in Chicago, roughly ¥10bn held in reserve for acquisitions, and redemption of the company's perpetual subordinated bonds.
Why it matters: A machine-tool maker funding a European casting expansion and a US R&D hub through overseas equity, rather than yen debt, is a bet that international investors will price the growth story more cheaply than the domestic bond market would.

Onto Innovation Becomes Rigaku Holdings' Top Shareholder as Carlyle-Linked Fund's Stake Shrinks to 0.29%
A U.S. semiconductor-metrology company now holds 27% of the Tokyo-listed instrument maker after a Carlyle-linked fund's voting stake fell from 27.29% to 0.29%, while a separate asset manager crossed the 10% disclosure threshold the same week.
Integral's Half-Year Profit Jumps on Carried Interest From Two Buyout Exits
Two completed exits, including the sale of M&I and Toyo Engineering, generated realized carried interest that pushed Integral's half-year profit to ¥8.77bn from ¥1.70bn a year earlier, its regulatory filing shows.
Oasis Management Passes 10% of AEON Financial Service, Reserves Right to Push for Board and Dividend Changes
Oasis Management's stake in AEON Financial Service climbed to 10.80% from 9.78%, and the fund has told regulators it may push for board removals, asset sales, delisting, or dividend policy changes within 12 months, plus a possible further 5%-plus purchase within three months if the price looks cheap.
WOWOW Signs Absorption-Split Contract for 51% Control of NTT Docomo's Lemino
WOWOW and NTT Docomo signed the absorption-split contract on August 12 that will fold Docomo's Lemino streaming business into a joint venture 51% owned by WOWOW, with the split, share transfer and commercial launch all targeted for October 1; WOWOW says the earnings impact for the year to March 2027 is still under review.
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Accounting Under the Microscope

AI Storm Pushes Earnings to November After Used-Truck Deal Probe Forces Three-Year Rewrite
A tip-off about past used-truck sales has widened into a three-fiscal-year accounting correction at AI storm, forcing the company to delay its quarterly results to November and consider a statutory filing extension while its auditor withholds sign-off.

Takara Holdings Delays Earnings After Auditor Balks Over US Biotech Unit's Books
Takara Holdings pulled its August 7 earnings release after its auditor said it could not complete a quarterly review of Takara Bio USA's accounts, and the Kyoto group now expects to miss the standard 45-day disclosure deadline with no new date set.
Sunwels breaches two loan covenants as billing-scandal losses drag on
Two Sunwels term loans, carrying balances of ¥321mn and ¥549mn, tripped their covenants this quarter, and lenders have only granted a principal repayment pause through September while the Parkinson's-care operator freezes new facility openings and absorbs a reimbursement-fee cut.
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Quick Hits: Earnings & Demand Signals
Mec's Chip-Packaging Chemicals Ride Generative-AI Boom to a 34% Sales Jump
Read moreMec's chemical additives for semiconductor packaging boards posted a 34% sales jump and a six-point margin gain in the six months to June, as generative-AI data-center chipmakers buy more of its CZ-series adhesion promoters across Japan, Taiwan and China.
Shikoku Kasei Raises Profit and Dividend Forecasts on AI Chip Material Demand
Read moreA server-board adhesion chemical and semiconductor process materials drove Shikoku Kasei's first-half operating profit up 80%, and the Japanese chemical maker has now raised both its full-year earnings guidance and its dividend outlook.
ExaWizards Sales Rise 41% After SMFG Capital Injection Reshapes Balance Sheet
Read moreExaWizards' quarterly revenue rose 41% to ¥3.45bn, but the bigger change sits on the balance sheet: a ¥5.4bn share allotment to Sumitomo Mitsui Financial Group pushed the AI developer's equity ratio to 70%, and it now plans its first dividend since listing.
Japan Prices Oncolys BioPharma's Esophageal Cancer Therapy at ¥9.3mn a Patient
Read moreJapan added Oncolys BioPharma's esophageal cancer cell therapy, development code OBP-301, to its national insurance price list at ¥3.1mn a unit, or ¥9.3mn per patient, with coverage starting August 13 and sales launching August 21 through Fujifilm Toyama Chemical.
Akatsuki Swings to Profit, Then Announces a Three-for-One Stock Split
Read moreA ¥787 million quarterly profit came with a ¥6.48 billion buyback and a three-for-one stock split set for October, while two newly acquired businesses have yet to show up in Akatsuki's income statement.
H.U. Group's Lab-Testing Unit Turns Profitable as Alzheimer's Test Clears Europe
Read moreH.U. Group Holdings swung to a ¥1.57bn quarterly profit as price adjustments fixed its loss-making testing-services unit, while a blood-based Alzheimer's diagnostic won certification in Europe.
Plus Alpha Consulting Buys a Loss-Making Wellbeing Startup and Its Own Stock on the Same Day
Read moreThe Tokyo HR-software group is spending ¥1.09bn for control of loss-making DE&I and wellbeing SaaS provider Cradle, and separately committing up to ¥1bn to a share buyback through the end of September, both approved at the same August 12 board meeting.
Abalance Delays Its Next Results Again While It Rewrites Years of Past Filings
Read moreAbalance expects to publish corrected historical filings and two backlogged fiscal-2026 results by August 21, but the same staffing squeeze pushes its next quarterly summary past its usual 45-day norm and into early October.
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More to Know: Ownership & Buybacks
Sony Spent ¥66.4bn on Buybacks in July, Reaching 38.8% of Its ¥500bn Cap
Read moreSony Group has already spent ¥193.9bn, nearly two-fifths of its ¥500bn buyback ceiling, after roughly three months of a twelve-month program that runs to May 2027.
Tera Group Locks In 86% of Satudora Holdings, Sets Up November Squeeze-Out Vote
Read moreTera and two allied holders now control 86.23% of Satudora Holdings after a ¥9.19bn tender offer, and plan to force out remaining shareholders through a share consolidation vote expected in early November.
CyberStep Unwinds ¥1.25bn Takeover of Call-Centre Firm 3rd, Admits Disclosure Lapse
Read moreCyberStep recovered its full ¥1.25 billion purchase price after cancelling January's takeover of contact-centre firm 3rd, and admitted two price-protection side deals should have been disclosed when they were signed, not held back until this week's filing on the unwind.