Worth reading
35Immaterial
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.Cyberattack on overseas subsidiary
Subject Entity
Consolidated subsidiary Zuken GmbH (ZG) and its subsidiaries
Target Locations / Products
The servers of ZG and its subsidiaries
Occurrence23 October 2026 (Japan time)
Same dayAwareness or receipt of notice23 October 2026 (Japan time) (the cyberattack and disruptions to some systems were confirmed)
This disclosure10/28/2026
Cause
Cyberattack by a third party
Company response
Investigation structure
The company is investigating the extent of the damage in coordination with external experts. The name, chairperson and establishment date of any third-party committee or similar body are Not disclosed
Outlook
The company will continue investigating the extent of the damage and promptly disclose any matters requiring disclosure once identified
Planned follow-up disclosure
Any matters requiring disclosure will be promptly disclosed once identified
| Item | Details |
|---|---|
| Event name | Cyberattack on overseas subsidiary |
| Date of occurrence | 23 October 2026 (Japan time) |
| Date recognized / date notice received | 23 October 2026 (Japan time) (the cyberattack and disruptions to some systems were confirmed) |
| Subject Entity | Consolidated subsidiary Zuken GmbH (ZG) and its subsidiaries |
| Target Locations / Products | The servers of ZG and its subsidiaries |
| Cause | Cyberattack by a third party |
| Investigation structure | The company is investigating the extent of the damage in coordination with external experts. The name, chairperson and establishment date of any third-party committee or similar body are Not disclosed |
| Outlook | The company will continue investigating the extent of the damage and promptly disclose any matters requiring disclosure once identified |
| Planned follow-up disclosure | Any matters requiring disclosure will be promptly disclosed once identified |
Items this document does not state (16)
Amount of Impact on Business PerformanceAccounting period in which recognizedImpact on Earnings ForecastType of litigation or proceedingCourt or authorityPlaintiffDefendantDate of filing / date of actionClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionSuspended operationsScheduled resumption dateMeasures to prevent recurrenceDirectors' and officers' liabilityVoting rights ownership percentage before the changeVoting rights ownership percentage after the change
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.Because the company was subject to a cyberattack by a third party.
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.