Komori
Other Disclosures6137KOIKE SANSO KOGYO CO.,LTD.Machinery

Notice Regarding a Cyberattack on the Company

The investigation into the cause and scope of the possible cyberattack suffered on 5 October 2026 has been completed, and the company reported that some system disruptions and business interruptions occurred and that information files had been made publicly available. The company continues to investigate whether personal information was leaked and, if so, the scope of the leak.

Worth reading
31Immaterial
0–100. This measures how worthwhile something is to read, not how good or bad the company is.
Direction
Deterioration
Direction inferred from the company’s description.
Scale
—
Displayed only when the document provides numerical figures.
Wording
Avoiding a definitive answer
How definitive the wording is.

Announced details

Location (as indicated in this announcement)

Head office: Sumida-ku, Tokyo

Impact on Business Performance

Any impact on consolidated results will be disclosed promptly if matters requiring disclosure arise. Meanwhile, the impact on the schedule for announcing results for the second quarter of the fiscal year ending March 2027 is minor.

The company does not address Contract Value / Offering price.

Announced details
ItemDetails
LocationHead office: Sumida-ku, Tokyo
Impact on Business PerformanceAny impact on consolidated results will be disclosed promptly if matters requiring disclosure arise. Meanwhile, the impact on the schedule for announcing results for the second quarter of the fiscal year ending March 2027 is minor.
Items this document does not state (16)
Names of Products / Services CoveredCounterpartyCounterparty overviewRelationship with the CompanyContract ValueOffering priceContract DateLaunch dateApplicable areaAward/certification nameAwarding / certifying bodyRegistration number and expiry dateLocation scaleQuantitative EffectsUsage historySource

These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.

The reasons the company gives

The company's own explanation, not something inferred from the numbers.

The company may have been subject to a cyberattack on 5 October 2026 and has restricted network connections to prevent the damage from spreading. This follows the confirmation of disruptions to some systems and information files being made publicly available on the internet.

How to read this page

This is not the documentKomori reads the disclosure the company filed and writes this summary. Figures are as stated by the company and are not audited.
Weight is not a verdictIt measures how much this changes what the company had already told the market. It is not a view on the shares.
Corrections happenIf the company reissues this disclosure, the page is rebuilt from the corrected version and the revision number moves up.
Notice Regarding a Cyberattack on the Company | KOIKE SANSO KOGYO CO.,LTD. (6137) timely disclosure | Komori