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Statutory disclosure document3111OMIKENSHI CO.,LTD.Materials and Chemicals

Notice of Submission of Application for Approval to Extend the Filing Deadline for the Securities Report for the 161st Fiscal Period (Fiscal Year Ending March 2026)

The Company decided to submit to the Kinki Local Finance Bureau an application for approval to extend the filing deadline for the Annual Securities Report for the fiscal year ending March 2026 from 30 June to 30 September. The extension has not yet been approved, and the latter date is the deadline that would apply if the application is approved.

Worth reading
66In focus
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
3
months (planned extension of the filing deadline)
Wording
Conditional
How definitive the wording is.

Decision and Details

Application for approval to extend the filing deadline for the Annual Securities Report for the 161st Fiscal Period (Fiscal Year Ending March 2026)

Decision29 June 2026 (decision to submit the application)
Period CoveredThe 161st Fiscal Period (Fiscal Year Ending March 2026), from 1 April 2025 to 31 March 2026
Going forwardIf the application to extend the filing deadline is approved, the Company will make a timely disclosure.
Quantity / scaleFiling deadline: extended from 30 June 2026 to 30 September 2026 if approved (3 months)
Reason

The core systems were shut down and various files stored on the servers were encrypted as a result of unauthorized access by an external third party. Because the core systems are unavailable, the Company has been forced to perform the closing process manually, significantly delaying procedures related to the closing. In addition, new internal control evaluation procedures and audits are required due to changes in business processes, and the audits are expected to take considerably longer than usual.

Impact on Business Performance

Procedures related to the closing for the fiscal year ending March 2026 have not been completed, and the Company is unable to complete preparation of the Annual Securities Report and the statutory audit procedures by the statutory filing deadline.

Decision and Details
ItemDetails
Matter CoveredApplication for approval to extend the filing deadline for the Annual Securities Report for the 161st Fiscal Period (Fiscal Year Ending March 2026)
Decision Date29 June 2026 (decision to submit the application)
Period CoveredThe 161st Fiscal Period (Fiscal Year Ending March 2026), from 1 April 2025 to 31 March 2026
Quantity / scaleFiling deadline: extended from 30 June 2026 to 30 September 2026 if approved (3 months)
Impact on Business PerformanceProcedures related to the closing for the fiscal year ending March 2026 have not been completed, and the Company is unable to complete preparation of the Annual Securities Report and the statutory audit procedures by the statutory filing deadline.
ReasonThe core systems were shut down and various files stored on the servers were encrypted as a result of unauthorized access by an external third party. Because the core systems are unavailable, the Company has been forced to perform the closing process manually, significantly delaying procedures related to the closing. In addition, new internal control evaluation procedures and audits are required due to changes in business processes, and the audits are expected to take considerably longer than usual.
Governing RuleArticle 15-2, paragraph 1 of the Cabinet Office Ordinance on Disclosure of Corporate Affairs, etc.
Related previous disclosures“Notice Regarding System Failures Caused by a Cyberattack” dated 23 March 2026 and 13 April 2026
Future plansIf the application to extend the filing deadline is approved, the Company will make a timely disclosure.
Items this document does not state (3)
Decision-Making BodyImplementation DateAmount

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.

A cyberattack that occurred on 16 March caused the core systems to shut down and encrypted files stored on the servers, significantly delaying the closing process. In addition, the internal control evaluation and audit procedures associated with changes to business processes are expected to take considerably longer than usual.

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Notice of Submission of Application for Approval to Extend the Filing Deadline for the Securities Report for the 161st Fiscal Period (Fiscal Year Ending March 2026) | OMIKENSHI CO.,LTD. (3111) timely disclosure | Komori