City of Naha security incident history
Hacking, data breaches and other security incidents involving City of Naha, with related coverage.
Incidents: 1 · Most recent
Naha confirms 15,700 email addresses leaked in external email service cyber-attack
↳ Knock-on damage from the Arara incident · View original incident15.7kImpact: 15,700 user email addresses
The Japanese city of Naha said 15,700 user email addresses had been exposed through unauthorised access to Arara Message, an external email delivery service used by its online application system. This was a follow-up announcement on the incident in which unauthorised access was confirmed on 31 October 2026. It was confirmed that no other information, including email bodies, My Number identification numbers or application information, had been exposed.
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