Komori
Occurring Fact4062IBIDEN CO.,LTD.Electrical Equipment and Precision Instruments

Incident Affecting Our Website (Update No. 2)

Following the website disruption that occurred on 13 April, display functionality was provisionally restored by 22:00 that day. Restrictions on the use of certain functions, the investigation into the unauthorized access route and root cause, and permanent countermeasures remain ongoing.

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Occurrence of a Disruption on Our Website

Subject Entity

IBIDEN CO.,LTD.

Target Locations / Products

Our website

Occurrence13 April 2026
This disclosure04/14/2026

Company response

Suspended operations

Access to the website has been suspended. Use of certain functions remains restricted.

Measures to prevent recurrence

Strengthening security measures and implementing permanent countermeasures

Outlook

The company will continue its thorough investigation and strengthen its security measures to ensure complete security and the accuracy of the information posted. It will provide a further update once permanent recovery has been completed and final security has been confirmed.

Planned follow-up disclosure

The Company will promptly make an announcement if any matter requiring disclosure arises.

Event that occurred
ItemDetails
Event nameOccurrence of a Disruption on Our Website
Date of occurrence13 April 2026
Subject EntityIBIDEN CO.,LTD.
Target Locations / ProductsOur website
Suspended operationsAccess to the website has been suspended. Use of certain functions remains restricted.
Measures to prevent recurrenceStrengthening security measures and implementing permanent countermeasures
OutlookThe company will continue its thorough investigation and strengthen its security measures to ensure complete security and the accuracy of the information posted. It will provide a further update once permanent recovery has been completed and final security has been confirmed.
Planned follow-up disclosureThe Company will promptly make an announcement if any matter requiring disclosure arises.
Items this document does not state (17)
Date recognized / date notice receivedCauseAmount 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 collectionScheduled resumption dateInvestigation structureDirectors' 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 company has explained that it is continuing its investigation and recovery work to identify the unauthorized access route, determine the root cause, strengthen security measures, and implement permanent countermeasures. No specific cause has yet been disclosed.

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.
Incident Affecting Our Website (Update No. 2) | IBIDEN CO.,LTD. (4062) timely disclosure | Komori