Komori
Occurring Fact4290Prestige International Inc.Information and Communications, Services and Others

Notice and Apology Regarding the Leakage of Personal Information Due to Unauthorized Access to Our Group's Business Systems

We confirmed that the Group's business systems were subject to unauthorized access by a third party and that customer information relating to roadside assistance and other services entrusted to PCS was exfiltrated. The affected data may comprise approximately 5.5 million records, and the cause and scope of the impact are under investigation.

Worth reading
68In focus
Scored from 4 of 5 sections
Direction
Deterioration
Direction inferred from the company’s description.
Scale
5500000
Records (maximum approx.)
Wording
Avoiding a definitive answer
How definitive the wording is.

Leakage of Personal Information Caused by Unauthorized Access to the Group's Business Systems

Subject Entity

Prestige International Inc. and its consolidated subsidiary 株式会社プレステージ・コアソリューション (PCS)

Target Locations / Products

Business systems used by PCS to handle and arrange roadside assistance and other services entrusted by client companies

Occurrence29 October 2026 (the date unauthorized access was detected)
Same day
Awareness or receipt of notice29 October 2026 (the date unauthorized access was detected)
This disclosure11/02/2026
Cause

Unauthorized access by a third party. The cause of the unauthorized access itself is still under investigation

Company response

Suspended operations

The system was shut down on 30 October 2026. However, operations relating to roadside assistance and other services continued through alternative arrangements.

Investigation structure

An investigation is under way in cooperation with external specialist organisations. Establishment of a third-party committee or special investigation committee: Not disclosed

Measures to prevent recurrence

System modifications and strengthened monitoring controls

Related procedures

Type

Reporting to the Personal Information Protection Commission and consultation with the police

Court or authority

Personal Information Protection Commission and police

Impact on Earnings Forecast

If we determine that revisions to the consolidated earnings forecast for the fiscal year ending March 2027 are necessary, or if any new facts that should be disclosed become known, we will promptly make an announcement.

Outlook

We will respond regarding notification to the affected customers after consulting with the client companies, and will continue the investigation in cooperation with external specialist organisations. We will modify the systems and strengthen the monitoring controls to prevent recurrence.

Planned follow-up disclosure

If we determine that revisions to the earnings forecast are necessary, or if any new facts that should be disclosed become known, we will promptly make an announcement.

Event that occurred
ItemDetails
Event nameLeakage of Personal Information Caused by Unauthorized Access to the Group's Business Systems
Date of occurrence29 October 2026 (the date unauthorized access was detected)
Date recognized / date notice received29 October 2026 (the date unauthorized access was detected)
Subject EntityPrestige International Inc. and its consolidated subsidiary 株式会社プレステージ・コアソリューション (PCS)
Target Locations / ProductsBusiness systems used by PCS to handle and arrange roadside assistance and other services entrusted by client companies
CauseUnauthorized access by a third party. The cause of the unauthorized access itself is still under investigation
Impact on Earnings ForecastIf we determine that revisions to the consolidated earnings forecast for the fiscal year ending March 2027 are necessary, or if any new facts that should be disclosed become known, we will promptly make an announcement.
Type of litigation or proceedingReporting to the Personal Information Protection Commission and consultation with the police
Court or authorityPersonal Information Protection Commission and police
Suspended operationsThe system was shut down on 30 October 2026. However, operations relating to roadside assistance and other services continued through alternative arrangements.
Investigation structureAn investigation is under way in cooperation with external specialist organisations. Establishment of a third-party committee or special investigation committee: Not disclosed
Measures to prevent recurrenceSystem modifications and strengthened monitoring controls
OutlookWe will respond regarding notification to the affected customers after consulting with the client companies, and will continue the investigation in cooperation with external specialist organisations. We will modify the systems and strengthen the monitoring controls to prevent recurrence.
Planned follow-up disclosureIf we determine that revisions to the earnings forecast are necessary, or if any new facts that should be disclosed become known, we will promptly make an announcement.
Items this document does not state (11)
Amount of Impact on Business PerformanceAccounting period in which recognizedPlaintiffDefendantDate of filing / date of actionClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionScheduled 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.

Because unauthorized access by a third party occurred. The cause of the unauthorized access itself is still under investigation.

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 and Apology Regarding the Leakage of Personal Information Due to Unauthorized Access to Our Group's Business Systems | Prestige International Inc. (4290) timely disclosure | Komori