Uji Hospital

Uji Hospital, operating as Ajirogi-kai Social Welfare Corporation, is a healthcare institution based in Japan. The hospital provides medical services to patients, functioning as a core healthcare provider. Its legal structure as a social welfare corporation is noted, though specific operational details or scale are not provided in available records. The organization's primary role is the delivery of general medical care, consistent with standard hospital services. No additional information regarding its market reach, size, or specialized departments is explicitly stated.

On January 6, 2023, Uji Hospital was targeted by a ransomware attack that resulted in the encryption of its systems and a ransom demand. The incident involved external data communication after the attack, suggesting potential exfiltration of personal information. This data may have included names and contact details of patients as well as current and former staff members. In response, the hospital established a dedicated channel for affected parties and issued formal apologies. At the time of disclosure, there was no confirmed misuse of the compromised information. However, the hospital acknowledged it could not definitively rule out information leakage. The ransomware event constituted a significant cybersecurity incident for the organization. It remains a documented event in the hospital's recent operational history.