It was announced that a third party had gained unauthorized access to the SC Co. server operated by a service provider, creating the possibility that inquiry information stored in Citizen Watch's system may have been compromised. The information potentially affected relates to approximately 100,000 people, and unauthorized access between around 20:33 on 10/2 and around 8:01 on 10/3 has been reported.
This incident is reported to have resulted from unauthorized access by a third party to the server of SC Co., the service provider, creating the possibility that inquiry information stored in the system provided by SC Co. may have been compromised. SC Co. has taken emergency measures, including blocking access.
The information that may have been compromised is inquiry information relating to the CITIZEN brand that was stored in the system as of 3 October 2026. It may include the names, addresses, telephone numbers and email addresses of approximately 100,000 people. If bank account or credit card information was entered in the inquiry details field, that information may also have been compromised.
The impact of this incident is limited to information stored in the system. No access has been confirmed to other systems, such as Citizen Watch's e-commerce site or membership services. No secondary damage has been confirmed at this time.
Citizen Watch is currently working with the service provider and external organisations to determine the scope of the impact and prevent recurrence. It is progressively contacting affected individuals directly and working to identify the cause and strengthen its systems. Going forward, it will proceed with the migration of its website inquiry service and plans to suspend use of the system and delete its data from mid-October 2026 onward.