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Occurring Fact1377SAKATA SEED CORPORATIONFood

Final Report on Unauthorized Access to Our Company and Its Consolidated Subsidiary in the United States

The investigation into unauthorized access to SAKATA SEED CORPORATION's servers and those of its U.S. consolidated subsidiary has been completed, and the scope of personal information that may have been leaked and measures to prevent recurrence have been finalized. Approximately 56,700 records of personal information were affected in the incident involving SAKATA SEED CORPORATION, while the impact of the incident involving the U.S. subsidiary was limited to some of its systems.

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Final Report on Unauthorized Access to Our Company and Its Consolidated Subsidiary in the United States

Subject Entity

SAKATA SEED CORPORATION, Sakata America Holding Company, Inc.

Target Locations / Products

SAKATA SEED CORPORATION's servers, and the servers and some systems of Sakata America Holding Company, Inc.

Occurrence11 November 2025 (the date on which SAKATA SEED CORPORATION confirmed evidence of access to some of its data), 21 January 2026 (the date on which unauthorized access to the U.S. consolidated subsidiary was detected)
Same day
Awareness or receipt of notice11 November 2025, 21 January 2026
This disclosure08/19/2026
Cause

In the incident involving SAKATA SEED CORPORATION, a public-facing server used for remote access was the point of entry, and administrator privileges may have been obtained. In the incident involving the U.S. subsidiary, remote-access credentials were the point of entry, and the intruder may have entered the internal network.

Company response

Investigation structure

An external security specialist was engaged to conduct log analysis and a forensic investigation. The investigation has been completed.

Measures to prevent recurrence

Review of network management practices and tighter communication controls; stricter administration of administrator privileges and enhanced detection of unauthorized access through 24-hour monitoring; review of internal policies and related rules and thorough information security training for all employees; measures to prevent recurrence and strengthen security, including a review of network management practices

Related procedures

Court or authority

Relevant authorities (reported)

Outlook

We will thoroughly implement security measures and make every effort to prevent recurrence. The U.S. subsidiary's business activities will continue as usual. Future inquiries will be handled by SAKATA SEED CORPORATION's personal information contact desk or its Corporate Communications Department.

Event that occurred
ItemDetails
Event nameFinal Report on Unauthorized Access to Our Company and Its Consolidated Subsidiary in the United States
Date of occurrence11 November 2025 (the date on which SAKATA SEED CORPORATION confirmed evidence of access to some of its data), 21 January 2026 (the date on which unauthorized access to the U.S. consolidated subsidiary was detected)
Date recognized / date notice received11 November 2025, 21 January 2026
Subject EntitySAKATA SEED CORPORATION, Sakata America Holding Company, Inc.
Target Locations / ProductsSAKATA SEED CORPORATION's servers, and the servers and some systems of Sakata America Holding Company, Inc.
CauseIn the incident involving SAKATA SEED CORPORATION, a public-facing server used for remote access was the point of entry, and administrator privileges may have been obtained. In the incident involving the U.S. subsidiary, remote-access credentials were the point of entry, and the intruder may have entered the internal network.
Court or authorityRelevant authorities (reported)
Investigation structureAn external security specialist was engaged to conduct log analysis and a forensic investigation. The investigation has been completed.
Measures to prevent recurrenceReview of network management practices and tighter communication controls; stricter administration of administrator privileges and enhanced detection of unauthorized access through 24-hour monitoring; review of internal policies and related rules and thorough information security training for all employees; measures to prevent recurrence and strengthen security, including a review of network management practices
OutlookWe will thoroughly implement security measures and make every effort to prevent recurrence. The U.S. subsidiary's business activities will continue as usual. Future inquiries will be handled by SAKATA SEED CORPORATION's personal information contact desk or its Corporate Communications Department.
Items this document does not state (15)
Amount of Impact on Business PerformanceAccounting period in which recognizedImpact on Earnings ForecastType of litigation or proceedingPlaintiffDefendantDate 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 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.

In the incident involving SAKATA SEED CORPORATION, administrator privileges may have been obtained through a public-facing server used for remote access. In the incident involving the U.S. subsidiary, the intruder may have entered the internal network using remote-access credentials.

How to read this page

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Corrections happenIf the company reissues this disclosure, the page is rebuilt from the corrected version and the revision number moves up.
Final Report on Unauthorized Access to Our Company and Its Consolidated Subsidiary in the United States | SAKATA SEED CORPORATION (1377) timely disclosure | Komori