Data on 510,000 people linked to Hokkaido hospitals possibly leaked online

Source:Kyodo News

02 — Who / Subject

Hokkaido Medical Center, Hokkaido Cancer Center

03 — Where / Locus

Hokkaido, Japan

04 — When / Temporality

June 9, 2026

Verified: June 9, 2026

05 — Why / Core Summary

"Data on up to 510,000 people linked to Hokkaido hospitals may have been leaked. Hard disks containing patient and staff information were sold online."

Conflict Analysis

A significant data breach involving sensitive medical information, highlighting cybersecurity risks in healthcare.

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COMPAMIR

COMPAMIR

Data on 510,000 people linked to Hokkaido hospitals possibly leaked online