Nidec TOSOK Announces Cybersecurity Incident Involving Ransomware Attack on部分 Information Systems

Release Date: June 23, 2026 Statement Date: June 22, 2026 Statement Time: 19:11:33 Company Code: 6230 Company Name: Nidec TOSOK Subject: Notification Regarding Ransomware Attack on部分 of Information Systems Applicable Clause: Clause 26 Incident Date: June 22, 2026

Details: 1. Incident Date: June 22, 2026 2. Cause: On the same day, the company detected that部分 of its servers had been attacked by ransomware, resulting in the disruption of normal operations for部分 information systems, including ERP. 3. Response Process: Upon detecting the anomaly, the cybersecurity team immediately activated defense mechanisms and implemented network disconnection and isolation measures. 4. Estimated Loss or Impact: Affected systems are being restored逐步. The extent of impact on overall business operations and financial condition is currently under assessment. 5. Potential Insurance Payout Amount: Not applicable 6. Improvement Status and Future Countermeasures: The company will appropriately adjust production and shipment schedules based on the progress of system recovery. 7. Other Matters to Be Disclosed: None.