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Possible Personal Information Leak in Beppu City as Well; "Arcadia," Used by the Prefecture and 14 Municipalities, Suffers Unauthorized Access

Summary
In a series of incidents involving unauthorized access to companies operating disaster prevention systems for municipalities nationwide, it has now been revealed that personal information may have been leaked in Beppu City, Oita Prefecture. The company in question is "Arcadia," an Osaka-based company that provides disaster prevention email and other distribution services to municipalities across Japan. The Beppu City Fire Department uses Arcadia…
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Amid a series of data breaches involving personal information due to unauthorized access at local governments and companies, it has been discovered that the Hiroshima Prefectural Police may have also suffered a data breach, potentially involving the names and affiliations of approximately 5,700 police officers and staff. According to the prefectural police, the unauthorized access to the Osaka-based IT company "Arcadia" may have resulted in the …

[Suzuka] Suzuka City, Mie Prefecture, announced on the 14th that approximately 11,841 pieces of personal information of citizens and employees registered in the city's disaster email system and employee mobilization system may have been leaked. This was due to unauthorized access to Arcadia (Minoh City, Osaka Prefecture), the company that maintains both systems. According to the city, the information that may have been leaked includes 10,396 ema…

Following the unauthorized access incident at Arcadia (Minoh City, Osaka Prefecture), a service provider for distributing disaster prevention information to local governments, several local governments in Akita Prefecture announced on the 14th that they may have had personal information leaked. Odate City reported that email addresses…

According to a summary compiled by the Minami-Nippon Shimbun on the 14th, approximately 30,000 email addresses and other personal information belonging to residents of 13 municipalities in Kagoshima Prefecture may have been leaked due to unauthorized access to Arcadia (Minoh City, Osaka Prefecture), a company that handles disaster prevention information distribution services for local governments. All of these municipalities have entrusted Arcad…

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373news.com broke the news on Wednesday, October 14, 2026.
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