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Occurring Fact6357Sansei Technologies,Inc.Machinery

Notice Concerning a Cyberattack on an Overseas Subsidiary

A server belonging to overseas subsidiary FORREC Ltd. was detected to have been subjected to a cyberattack by a third party. The impact on operations and business partners, and whether any information was leaked, are currently under investigation.

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Cyberattack on overseas subsidiary

Subject Entity

FORREC Ltd. (the Company's overseas subsidiary)

Target Locations / Products

FORREC Ltd.'s servers

Awareness or receipt of notice3 April 2026 (Japan time) (the date the cyberattack was detected)
This disclosure04/07/2026
Cause

Cyberattack by a third party

Impact on Earnings Forecast

The impact on financial results is currently being assessed. The company will promptly disclose any matters that it determines should be disclosed.

Company response

Investigation structure

The company has established an emergency response team. In coordination with FORREC, it is confirming whether operations have been disrupted and whether business partners have been affected.

Outlook

FORREC is proceeding with emergency response measures and analyzing the extent of the damage. The company is also coordinating with FORREC to confirm whether the Group as a whole has been affected, whether business partners have been affected, and whether any information was leaked.

Planned follow-up disclosure

The company will promptly disclose any matters that it determines should be disclosed.

Event that occurred
ItemDetails
Event nameCyberattack on overseas subsidiary
Date recognized / date notice received3 April 2026 (Japan time) (the date the cyberattack was detected)
Subject EntityFORREC Ltd. (the Company's overseas subsidiary)
Target Locations / ProductsFORREC Ltd.'s servers
CauseCyberattack by a third party
Impact on Earnings ForecastThe impact on financial results is currently being assessed. The company will promptly disclose any matters that it determines should be disclosed.
Investigation structureThe company has established an emergency response team. In coordination with FORREC, it is confirming whether operations have been disrupted and whether business partners have been affected.
OutlookFORREC is proceeding with emergency response measures and analyzing the extent of the damage. The company is also coordinating with FORREC to confirm whether the Group as a whole has been affected, whether business partners have been affected, and whether any information was leaked.
Planned follow-up disclosureThe company will promptly disclose any matters that it determines should be disclosed.
Items this document does not state (16)
Date of occurrenceAmount 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 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 subjected to a cyberattack by a third party. The company is confirming whether operations have been disrupted, whether business partners have been affected, and whether any information was leaked.

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 Concerning a Cyberattack on an Overseas Subsidiary | Sansei Technologies,Inc. (6357) timely disclosure | Komori