Update on Unauthorized Access to the Company's IT Environment
Murata Manufacturing Co.,Ltd.
Our IT environment and the specific system affected by the unauthorized access. The name of the specific system is Not disclosed
Unauthorized access by a third party
Company response
An internal crisis management task force has been established. The company is working with external cybersecurity specialists. The establishment of a third-party committee is Not disclosed
Blocking access from suspicious sources to the specific system affected by the unauthorized access and strengthening monitoring / strengthening access controls to prevent unauthorized intrusion into the internal network / gradually implementing access controls to prevent unauthorized intrusion into major cloud environments / strengthening authentication methods and access management to prevent unauthorized logins and impersonation / expanding the scope of security monitoring and detection rules for the early detection of cyberattacks and rapid response / strengthening operational processes for security management to achieve stable security operations / thoroughly implementing and continuing to strengthen authentication methods and access management to prevent unauthorized logins and impersonation / continuing to enhance detection capabilities and expand monitoring coverage in preparation for increasingly sophisticated attacks / strengthening monitoring of the external circulation of information relating to the company to enable early detection of damage / expanding regular external audits and third-party assessments to establish a continuous security improvement cycle
The impact on business results remains under review. If a material impact on future business results is identified, the company will make an announcement promptly
Related procedures
The necessary supervisory authorities, including the Personal Information Protection Commission, and the police
The company will continue investigating the scope of the impact, preventing the damage from spreading, coordinating with the relevant authorities, and monitoring the circulation and publication of information on the internet. If new facts are identified, the company will review the details and promptly provide an update
| Item | Details |
|---|---|
| Event name | Update on Unauthorized Access to the Company's IT Environment |
| Date of occurrence | 28 February 2026 (the date on which the possibility of unauthorized access was recognized; the actual date of the unauthorized access is Not disclosed) |
| Date recognized / date notice received | 28 February 2026 |
| Subject Entity | Murata Manufacturing Co.,Ltd. |
| Target Locations / Products | Our IT environment and the specific system affected by the unauthorized access. The name of the specific system is Not disclosed |
| Cause | Unauthorized access by a third party |
| Impact on Earnings Forecast | The impact on business results remains under review. If a material impact on future business results is identified, the company will make an announcement promptly |
| Court or authority | The necessary supervisory authorities, including the Personal Information Protection Commission, and the police |
| Investigation structure | An internal crisis management task force has been established. The company is working with external cybersecurity specialists. The establishment of a third-party committee is Not disclosed |
| Measures to prevent recurrence | Blocking access from suspicious sources to the specific system affected by the unauthorized access and strengthening monitoring / strengthening access controls to prevent unauthorized intrusion into the internal network / gradually implementing access controls to prevent unauthorized intrusion into major cloud environments / strengthening authentication methods and access management to prevent unauthorized logins and impersonation / expanding the scope of security monitoring and detection rules for the early detection of cyberattacks and rapid response / strengthening operational processes for security management to achieve stable security operations / thoroughly implementing and continuing to strengthen authentication methods and access management to prevent unauthorized logins and impersonation / continuing to enhance detection capabilities and expand monitoring coverage in preparation for increasingly sophisticated attacks / strengthening monitoring of the external circulation of information relating to the company to enable early detection of damage / expanding regular external audits and third-party assessments to establish a continuous security improvement cycle |
| Outlook | The company will continue investigating the scope of the impact, preventing the damage from spreading, coordinating with the relevant authorities, and monitoring the circulation and publication of information on the internet. If new facts are identified, the company will review the details and promptly provide an update |
| Planned follow-up disclosure | If new facts are identified, the company will review the details and promptly provide an update |
Items this document does not state (13)
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.Data was unlawfully obtained through unauthorized access by a third party. The impact on business results remains under review, and the company states that it will make an announcement if a material impact is identified.