Access issues affecting the corporate and IR websites

Worth reading

36Immaterial

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Direction

Deterioration

Direction inferred from the company’s description.

Scale

—

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Wording

Avoiding a definitive answer

How definitive the wording is.

Subject Entity

AUTOSERVER CO.,LTD. (operator of the corporate website), IDC Frontier, Inc. (operator of the cloud service used)

Target Locations / Products

Our corporate website (autoserver.co.jp, including the investor-relations site)

OccurrenceEarly morning of 7 October 2026 (the date of the IDCF Cloud outage)

Awareness or receipt of noticeDate notification was received from IDC Frontier, Inc.: Not disclosed

This disclosure10/08/2026

Cause

The “IDCF Cloud” service used by the website was hit by a ransomware attack by a third party

Company response

Suspended operations

Browsing and access to our corporate website (autoserver.co.jp, including the investor-relations site)

Investigation structure

We are determining the nature and scope of the damage.

Outlook

We are determining the nature and scope of the damage. We have been notified by IDC Frontier that early recovery and restoration will be difficult.

Event that occurred
Item	Details
Event name	Access issues affecting the corporate and IR websites
Date of occurrence	Early morning of 7 October 2026 (the date of the IDCF Cloud outage)
Date recognized / date notice received	Date notification was received from IDC Frontier, Inc.: Not disclosed
Subject Entity	AUTOSERVER CO.,LTD. (operator of the corporate website), IDC Frontier, Inc. (operator of the cloud service used)
Target Locations / Products	Our corporate website (autoserver.co.jp, including the investor-relations site)
Cause	The “IDCF Cloud” service used by the website was hit by a ransomware attack by a third party
Suspended operations	Browsing and access to our corporate website (autoserver.co.jp, including the investor-relations site)
Investigation structure	We are determining the nature and scope of the damage.
Outlook	We are determining the nature and scope of the damage. We have been notified by IDC Frontier that early recovery and restoration will be difficult.

Items this document does not state (16)

Amount 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 dateMeasures to prevent recurrenceDirectors' and officers' liabilityVoting rights ownership percentage before the changeVoting rights ownership percentage after the changePlanned follow-up disclosure

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 “IDCF Cloud” service provided by IDC Frontier, Inc., which our websites used, was hit by a ransomware attack by a third party. We are still determining the nature and scope of the damage, and have been notified by IDC Frontier that early recovery and restoration will be difficult.

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