To Our Valued Customers

Thank you for your continued support.

We are writing to inform you of an incident involving unauthorized access (ransomware)
that caused a system outage in one of our systems.

We sincerely apologize for the significant concern and inconvenience this incident has caused
to all those affected.

[Current Status]

・All affected systems have been restored.
・Business operations have resumed as usual as of today.

[Impact on Customer Information]

At this time, we have not confirmed any leakage of the information provided by your company to external parties.
We are continuing our investigation and will report any changes in the situation promptly.

Regarding the cause of this incident, we are currently conducting a detailed investigation and analysis in collaboration with external specialized agencies.

At this time, we understand that the incident was likely caused by a combination of multiple factors,
rather than a single specific cause. Regarding our future response, we take this matter
very seriously and will continue to implement measures to prevent recurrence based on the investigation results.

We would like to once again apologize to all stakeholders for any concern this may have caused,
and we will continue to work as a group to strengthen our security
so that you can continue to do business with us with peace of mind.

If you have any questions regarding this matter, please contact
the inquiry point listed below. We appreciate your continued support.

[Inquiry Point / Contact]

Naigai Co., Ltd.

Naigai CSIRT Response Headquarters

csirt@naigaijp.com