Investigations, recalls, restatements, lawsuits and late filings at Japanese companies.
Bookoff Group Holdings says 6,383,279 people were affected by the member-data breach, against 6,427,735 leaked member records, and will start emailing those affected on October 15; it says payment and bank data are not managed in the affected system.
Olympus says an FDA warning letter on quality-system findings at six facilities does not limit production or sales or require a recall, and that it will respond within 15 business days.
Temairazu, a hotel reservation software provider, says a third party may have viewed or obtained booking records on up to about 4.45 million people, and that it cannot yet estimate the effect on earnings.
Kansai Electric estimates that rainwater entering past an upside-down cover plate, fitted in 2010, corroded a Mihama Unit 3 pipe through; it plans to restart the reactor on October 10 and resume full operation on November 4.
IRISO Electronics says its investigation found test reports built on past data and revenue booked before shipment, and it forecasts operating profit down 35.6% to ¥3.5bn for the year to March 2027 as remediation costs rise.
A third party took member data from a Book Off subsidiary's system, covering up to about 6.43mn records; the company says no payment data was held there and is still counting the people affected.
Adventure says one of three separate intrusions exposed or may have exposed about 14.64mn skyticket records, including 4.13mn with hashed passwords, and it has suspended saved-card payments while it assesses the earnings impact.
Optimus Group's board has resolved to put its 30%-owned Australian affiliate OzCar into voluntary administration, reversing a May plan to exit the alliance, with its loans, guarantees and earnings impact still under review.
Nihon M&A Center Holdings has formed a five-member independent committee to establish how two interim dividends exceeded the legal limit and to examine whether directors are responsible, with a report expected in late October 2026.
Ikegami Tsushinki has postponed its 12 November interim results after isolating accounting servers following unauthorized access, saying full system recovery will take time and that it will announce a new date once one is decided.
Mitsubishi Motors said a settlement ended the lawsuit against Mitsubishi Motors North America on October 6 US time, will book the cost in the quarter to September, and kept its earnings forecast unchanged, with no amount disclosed.
Sapporo, Kirin and Asahi each disclosed JFTC action on October 7, 2026; Sapporo describes the suspicion as price restraint among four major alcohol makers, and all three say the earnings impact is unknown.
Nihon M&A Center Holdings says its December 2024 and December 2025 interim dividends exceeded the distributable amount by ¥71.7mn and ¥833.2mn, that no repayment will be sought from shareholders, and that an outside committee will examine director responsibility.
Monogatari says names, emails and phone numbers of 10,788,963 Yakiniku King app users leaked after unauthorised access; it reports no confirmed misuse or public release as of disclosure, while the cause and earnings impact remain under review.
Ikegami Tsushinki said on October 2, 2026 that information it apparently held has been published on an attacker's dark-web leak site, and it is still checking what was posted and how far it extends.
Japan's transport ministry has barred Tokai Kisen from using three vessels from October 9 to October 28 after inspections found alcohol-related and record-falsification lapses; the company is still assessing the earnings impact.
An independent committee estimates the damage to Arclands' net profit for the year to February 2026 at ¥1.30bn after its pet-retail subsidiary's CFO overstated results, but Arclands expects the final restated accounts, due October 13, to differ.
Nidec's restatement of the five years to March 2025 cut net assets by ¥476.9bn and pushed dividends and buybacks above the distributable amount, as management aims to clear the remaining issues in October to obtain an audit opinion.
Nidec says restated accounts show its dividends and buybacks in each of the five years to March 2026 exceeded the distributable amount under the Companies Act, with ¥94.0bn paid out in the year to March 2023.
Iriso Electronics' president has judged controls ineffective as of 31 March 2026, listing six weaknesses that run from board oversight and thin internal audit to overseas subsidiaries whose problems did not reach headquarters in time and whose sales-booking checks fell short.
Advance Create's board approved a detailed plan on 30 September under which its president leaves the top job even if re-elected a director, a day after the TSE designated its shares special attention and set a listing penalty; no handover date is given.
IRISO Electronics' committee could not prove that about ¥27mn and ¥50mn paid to a local lawyer reached judges, but confirmed years of cash payments to customs officials, sales booked early and consolidated accounts built on an unfinished closing.
Axelspace Holdings said restoring the high-speed image-download link on four of the seven GRUS-3 satellites launched in July, and starting their commercial use, has been judged difficult, and a possible impairment charge on fixed assets has not been quantified.
Tokio Marine & Nichido settled a Credit Suisse-linked lawsuit over Greensill-linked insurance on September 24, its second confidential Greensill settlement this year, without admitting liability or disclosing terms.