Kokikai Yasue Hospital
| Primary URL | Location | Industry | www[.]yasue-hp[.]jp |
Country
Japan
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Healthcare
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Profile
Kokikai Yasue Hospital operates as a healthcare provider based in Japan, delivering medical services to patients. Its core function involves the diagnosis, treatment, and care of individuals, which inherently requires the management of sensitive personal health information. The hospital maintains comprehensive patient records, including names, dates of birth, contact details, medical histories, specific treatment information, and COVID-19 vaccination histories, indicating a full spectrum of clinical data handling typical of a modern medical institution. While the precise market reach beyond its Japanese headquarters is not detailed, the scale of its operations is evidenced by the volume of data it holds. A significant cybersecurity incident in July 2022 confirmed that the hospital's internal systems contained the personal and medical data of 111,191 patients, alongside information pertaining to 715 employees, demonstrating a substantial organizational footprint in terms of the individuals it serves and employs.
The hospital's most publicly documented distinguishing attribute is its experience with a major data security incident. On July 4, 2022, it suffered unauthorized access to its computer systems, an event suspected to involve ransomware. This breach resulted in the significant leakage of the aforementioned patient and employee data. The incident highlights the hospital's role as a custodian of highly sensitive health information and the critical importance of its cybersecurity posture. The exposed data categories, including detailed medical histories and vaccination records, underscore the specialized and confidential nature of the information processed. No confirmed operational disruption or specific threat actor attribution was disclosed in the available reporting, and the hospital's ownership structure or any parent-subsidiary relationships are not specified in the provided information. The event serves as a notable case study in the sector regarding the vulnerability of healthcare data to cyber threats.