Komori
Occurring Fact8129TOHO HOLDINGS CO.,LTD.Trading & Wholesale

Notice Regarding the Potential Leakage of Information at Our Subsidiary Following Unauthorized Access to “Blast Mail”

It was discovered that information concerning physicians and medical institutions held by consolidated subsidiary e-Healthcare may have been leaked following unauthorized access to the external email distribution service “Blastmail.” The company is investigating whether any leakage occurred and its scope, and the survey service for physicians has been temporarily suspended.

Worth reading
36Immaterial
0–100. This measures how worthwhile something is to read, not how good or bad the company is.
Direction
Deterioration
Direction inferred from the company’s description.
Scale
8000
Items (physician names and email addresses, approx.)
Wording
Avoiding a definitive answer
How definitive the wording is.

Possible information leakage at our subsidiary following unauthorized access to the external email delivery service "Blast Mail"

Subject Entity

株式会社eヘルスケア (consolidated subsidiary of Toho Holdings)

Target Locations / Products

The external email delivery service "Blast Mail," and email distribution using the service for ① eHealthcare's proprietary physician survey service and ② application thank-you emails for the Hospital Navi PR service

This disclosure10/23/2026
Cause

Unauthorized access by a third party to "Blast Mail"

Related procedures

Type

Investigation into the possibility of information leakage associated with the unauthorized access, and a report to the Personal Information Protection Commission

Court or authority

Personal Information Protection Commission

Company response

Suspended operations

Temporary suspension of eHealthcare's physician survey service

Investigation structure

Investigation by ラクスライトクラウド社 is ongoing

Outlook

The investigation by ラクスライトクラウド社 will continue, and any newly identified facts requiring disclosure will be disclosed promptly. Customers concerned will be warned to remain vigilant for suspicious emails and other threats.

Planned follow-up disclosure

If the progress of the investigation reveals any new facts requiring disclosure, they will be disclosed promptly.

Event that occurred
ItemDetails
Event namePossible information leakage at our subsidiary following unauthorized access to the external email delivery service "Blast Mail"
Subject Entity株式会社eヘルスケア (consolidated subsidiary of Toho Holdings)
Target Locations / ProductsThe external email delivery service "Blast Mail," and email distribution using the service for ① eHealthcare's proprietary physician survey service and ② application thank-you emails for the Hospital Navi PR service
CauseUnauthorized access by a third party to "Blast Mail"
Type of litigation or proceedingInvestigation into the possibility of information leakage associated with the unauthorized access, and a report to the Personal Information Protection Commission
Court or authorityPersonal Information Protection Commission
Suspended operationsTemporary suspension of eHealthcare's physician survey service
Investigation structureInvestigation by ラクスライトクラウド社 is ongoing
OutlookThe investigation by ラクスライトクラウド社 will continue, and any newly identified facts requiring disclosure will be disclosed promptly. Customers concerned will be warned to remain vigilant for suspicious emails and other threats.
Planned follow-up disclosureIf the progress of the investigation reveals any new facts requiring disclosure, they will be disclosed promptly.
Items this document does not state (15)
Date of occurrenceDate recognized / date notice receivedAmount of Impact on Business PerformanceAccounting period in which recognizedImpact on Earnings ForecastPlaintiffDefendantDate of filing / date of actionClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionScheduled 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 a third party illegally accessed the external email delivery service "Blast Mail." The operating company's investigation and review into whether any information was leaked and the scope of any leakage are ongoing.

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 Regarding the Potential Leakage of Information at Our Subsidiary Following Unauthorized Access to “Blast Mail” | TOHO HOLDINGS CO.,LTD. (8129) timely disclosure | Komori