東京都保健医療局（看護師等修学資金）Data breach / unauthorized access incident
- Occurred on
- April 20, 2026
- Announced on
- May 27, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- 565 people
- Main impact
- The administrative system for the nursing student loan program was configured to allow viewing personal information from other facilities; it was reported that 437 borrowers, 128 joint guarantors, and 4 staff across 3 facilities viewed the screens.
- Information involved
- Phone numberHome addressFull name
- Cause / key point
- A specific terminal operation allowed users to view information from other facilities. The Tokyo Metropolitan Government said it conducted a complete inspection of the access-restriction settings.
- Industry
- Government & municipal
- Listing / capital
- Government / public body
A program of 東京都保健医療局.
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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Attack method classification: Under investigation / not stated(Cause not disclosed)
Read the Under investigation / not stated guide and national trends →