An insurer says a health-guidance contractor's employee entered data on 19,996 people, including disease information, into an unauthorised generative AI service
Notices from RIZAP's client insurers say that on 20 August 2026 it emerged that a staff member of RIZAP, the company they contract for specific health guidance, had entered data containing members' personal information into an external generative AI service that RIZAP had not permitted for work. The National Civil Engineering and Construction National Health Insurance Association (Doken Kokuho) puts the whole data set at 19,996 people, 1,167 of them its own members, and says the service was not under a corporate contract and that the matter was found when the employee noticed the transmission and reported it. A local-government employees' mutual aid association counts 726 of its members across 14 branches, and the IHI group health insurance society 210, according to a security news site that reads these as subsets of the 19,996. The data included membership numbers, email addresses, names, dates of birth, sex, some addresses and phone numbers, the type of health guidance and, for members with them, high blood pressure, diabetes or dyslipidaemia. The IHI society's notice, as relayed, names OpenAI as the provider and says OpenAI answered on 1 September that the data had not been used for model training. RIZAP's release, as described in an ITmedia column, says no third party other than the service operator could have viewed the data. Doken Kokuho says RIZAP confirmed to it that no third party viewed or used the information through the service; whether the provider's staff could view it was still being checked when the mutual aid association and the IHI society published.
AI involvement reported · Causal attribution supported · 5 sources, 4 underlying accounts · Added 12/10/2026