Tokushima University Hospital: unauthorized access to a system it manages may have leaked 16,945 patient records

In October 2025 the hospital's system was accessed from outside without authorization, and 16,945 registered patient records may have leaked.

Disclosed

2025-12-22

Organizations involved

Leaked or at risk

16.9K

16,945

Downtime

Unknown

What happened

2025-10-11
Unauthorized access from outside to a system the hospital manages began. It continued until October 22. [1] [2]
2025-10-29
The hospital found that the registered personal information may have leaked. [1] [2]
2025-12-22
It announced the possible leak of personal information. [1] [2]

The patient information that may have leaked totals 16,945 records. [2]

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[Breached][Major]Tokushima, TokushimaEducation and learning support16,945 leaked
Tokushima University
A system managed by Tokushima University Hospital was hit.

						Note
Tokushima University	[Breached]	[Major]	Tokushima, Tokushima	Education and learning support	16,945	A system managed by Tokushima University Hospital was hit.