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Occurring Fact6357Sansei Technologies,Inc.Machinery

Notice Regarding the Cyberattack on an Overseas Subsidiary (Final Report)

The investigation into the cyberattack on overseas subsidiary FORREC has been completed, and no evidence of the leakage or disclosure of personal or customer information was found. Countermeasures for the network equipment used as the point of entry have been completed, and FORREC has resumed normal operations.

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Cyberattack on overseas subsidiary

Subject Entity

FORREC Ltd. (the Company's overseas subsidiary)

Target Locations / Products

FORREC's servers and certain network equipment

Occurrence3 April 2026 (Japan time)
Same day
Awareness or receipt of noticeThe cyberattack was detected on 3 April 2026 (Japan time)
This disclosure05/13/2026
Cause

Cyberattack by a third party

Company response

Scheduled resumption date

Normal operations have already resumed

Investigation structure

An investigation into the scope of the impact was conducted with the assistance of external experts

Measures to prevent recurrence

Ongoing strengthening measures, including rebuilding the information security framework and enhancing security functions, as well as improving security awareness among all group employees through continuous education and training

Impact on Earnings Forecast

No impact on consolidated results from this incident is expected

Outlook

Each group company will work to continuously strengthen measures, including rebuilding the information security framework and enhancing security functions, based on advice from external experts and others, while striving to improve security awareness among all group employees through continuous education and training.

Planned follow-up disclosure

If any matter requiring disclosure becomes known, it will be promptly announced.

Event that occurred
ItemDetails
Event nameCyberattack on overseas subsidiary
Date of occurrence3 April 2026 (Japan time)
Date recognized / date notice receivedThe cyberattack was detected on 3 April 2026 (Japan time)
Subject EntityFORREC Ltd. (the Company's overseas subsidiary)
Target Locations / ProductsFORREC's servers and certain network equipment
CauseCyberattack by a third party
Impact on Earnings ForecastNo impact on consolidated results from this incident is expected
Scheduled resumption dateNormal operations have already resumed
Investigation structureAn investigation into the scope of the impact was conducted with the assistance of external experts
Measures to prevent recurrenceOngoing strengthening measures, including rebuilding the information security framework and enhancing security functions, as well as improving security awareness among all group employees through continuous education and training
OutlookEach group company will work to continuously strengthen measures, including rebuilding the information security framework and enhancing security functions, based on advice from external experts and others, while striving to improve security awareness among all group employees through continuous education and training.
Planned follow-up disclosureIf any matter requiring disclosure becomes known, it will be promptly announced.
Items this document does not state (13)
Amount of Impact on Business PerformanceAccounting period in which recognizedType of litigation or proceedingCourt or authorityPlaintiffDefendantDate of filing / date of actionClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionSuspended operationsDirectors' 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.

The impact on FORREC's operations was minor and it has resumed normal operations. In addition, because FORREC's network is separated from those of the other group companies, no impact on consolidated results is expected.

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Notice Regarding the Cyberattack on an Overseas Subsidiary (Final Report) | Sansei Technologies,Inc. (6357) timely disclosure | Komori