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Occurring Fact3093Treasure Factory Co.,LTD.Retail

Investigation Results and Preventive Measures Regarding the Leakage of Personal Information Due to Unauthorized Access at Our Consolidated Subsidiary (Third Report)

The investigation into the unauthorized access at the consolidated subsidiary has been completed, and the number of affected individuals has been confirmed at 136,464. The causes and management issues have been identified, and measures to prevent recurrence, including two-factor authentication and access rights management, are being implemented and advanced.

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53Recurring
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Investigation Results and Measures to Prevent Recurrence Regarding the Leakage of Personal Information Caused by Unauthorized Access at Our Consolidated Subsidiary

Subject Entity

株式会社カインドオル (our consolidated subsidiary)

Target Locations / Products

E-commerce platform

This disclosure10/13/2026
Cause

Theft of staff account credentials through phishing emails. In addition to the lack of two-factor authentication, the selection of authentication methods and account protection based on the assumption of phishing attacks, the design of permissions for bulk exports of customer information, and the monitoring framework for promptly identifying critical operations were inadequate.

Amount of Impact on Business Performance

Costs have been incurred for measures including operating a dedicated contact center, but the amount is Not disclosed. The impact on consolidated results is minor.

Impact on Earnings Forecast

There is no change to the consolidated earnings forecast for the fiscal year ending February 2027.

Related procedures

Type

Procedures toward submitting a final report to the Personal Information Protection Commission, consulting the police, and filing a victim report

Court or authority

Personal Information Protection Commission and police

Company response

Investigation structure

Investigation by the subsidiary concerned. The investigation involved cross-checking phishing emails, employee PC logs, and access and operation histories provided by the operator of the e-commerce platform. A third-party committee and special investigation committee are Not disclosed.

Measures to prevent recurrence

Introduce two-factor authentication for all staff accounts using phishing-resistant passkeys/Conduct an account inventory/Limit permissions for bulk exports of customer information/Review procedures for verifying critical operations and escalating them internally/Develop an information security manual/Provide training, including anti-phishing exercises/Conduct regular inventories of access rights and establish a monitoring framework/Develop information security guidelines applicable to all group companies and appoint an information security officer at each group company/Revise the operating policy for the Cybersecurity Incident Response Team (CSIRT) and establish an operating and reporting framework covering all group companies/Establish an Information Security Liaison Council and, through regular meetings, develop a framework for continuously strengthening cybersecurity across the group/Regularly conduct inventories of account management, access rights, and authentication status for external tools used by all group companies

Outlook

Measures to prevent recurrence will be advanced successively. Procedures toward filing a victim report will be advanced. The dedicated contact center will operate for the time being.

Planned follow-up disclosure

The Company will promptly announce any matters that require disclosure.

Event that occurred
ItemDetails
Event nameInvestigation Results and Measures to Prevent Recurrence Regarding the Leakage of Personal Information Caused by Unauthorized Access at Our Consolidated Subsidiary
Subject Entity株式会社カインドオル (our consolidated subsidiary)
Target Locations / ProductsE-commerce platform
CauseTheft of staff account credentials through phishing emails. In addition to the lack of two-factor authentication, the selection of authentication methods and account protection based on the assumption of phishing attacks, the design of permissions for bulk exports of customer information, and the monitoring framework for promptly identifying critical operations were inadequate.
Amount of Impact on Business PerformanceCosts have been incurred for measures including operating a dedicated contact center, but the amount is Not disclosed. The impact on consolidated results is minor.
Impact on Earnings ForecastThere is no change to the consolidated earnings forecast for the fiscal year ending February 2027.
Type of litigation or proceedingProcedures toward submitting a final report to the Personal Information Protection Commission, consulting the police, and filing a victim report
Court or authorityPersonal Information Protection Commission and police
Investigation structureInvestigation by the subsidiary concerned. The investigation involved cross-checking phishing emails, employee PC logs, and access and operation histories provided by the operator of the e-commerce platform. A third-party committee and special investigation committee are Not disclosed.
Measures to prevent recurrenceIntroduce two-factor authentication for all staff accounts using phishing-resistant passkeys/Conduct an account inventory/Limit permissions for bulk exports of customer information/Review procedures for verifying critical operations and escalating them internally/Develop an information security manual/Provide training, including anti-phishing exercises/Conduct regular inventories of access rights and establish a monitoring framework/Develop information security guidelines applicable to all group companies and appoint an information security officer at each group company/Revise the operating policy for the Cybersecurity Incident Response Team (CSIRT) and establish an operating and reporting framework covering all group companies/Establish an Information Security Liaison Council and, through regular meetings, develop a framework for continuously strengthening cybersecurity across the group/Regularly conduct inventories of account management, access rights, and authentication status for external tools used by all group companies
OutlookMeasures to prevent recurrence will be advanced successively. Procedures toward filing a victim report will be advanced. The dedicated contact center will operate for the time being.
Planned follow-up disclosureThe Company will promptly announce any matters that require disclosure.
Items this document does not state (13)
Date of occurrenceDate recognized / date notice receivedAccounting period in which recognizedPlaintiffDefendantDate of filing / date of actionClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionSuspended operationsScheduled resumption dateDirectors' 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.

Staff account credentials were stolen through phishing emails, and two-factor authentication, authentication methods and account protection, the design of permissions for bulk exports, and the monitoring framework for critical operations were inadequate.

How to read this page

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Investigation Results and Preventive Measures Regarding the Leakage of Personal Information Due to Unauthorized Access at Our Consolidated Subsidiary (Third Report) | Treasure Factory Co.,LTD. (3093) timely disclosure | Komori