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JP: Hokkaido hospitals data leak may hit 510k, HDDs sold online blamed

ID: 0f55d1eb-bdd6-574c-95ea-dd7197d1e7f8

STIX ID: report--0f55d1eb-bdd6-574c-95ea-dd7197d1e7f8

Feed Name: DataBreaches.Net

Threat Score
65/100

Date Published: 2026-06-08

Date Updated: 2026-06-09

Author: Dissent

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Japan’s National Hospital Organization reported that 33 hard drives (31 from Hokkaido Medical Center and 2 from Hokkaido Cancer Center) were listed on online auction sites and contained personal information — including names, addresses, and medical conditions — for at least 186,900 patients and staff, with the group warning the leak could potentially affect up to 510,000 people.

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