Investigating

JR Sendai Hospital: patient data of 11,791 people may have leaked after device losses

Possible data leak: After finding missing devices on February 3, 2026, the hospital issued a first notice on February 18 and later updates expanding the affected set to 11,791 people as of the June 15 update.

Last updated: 2026-11-09

Overview

Latest published total 11,791 (pressure-ulcer lists, restraint-minimisation lists, after-hours desk users and added devices). My Numbers, EHR notes, addresses, phones, accounts and cards listed as not at risk. Suspect arrested; confirmed exfiltration not established.

Timeline

  1. Occurred
  2. Discovered
  3. Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

Sources

  1. 個人情報の紛失に対するお詫びとご報告(2026年6月15日更新)JR仙台病院 · 2026-11-09
  2. 個人情報の紛失に対するお詫びとご報告JR仙台病院 · 2026-11-09
  3. 個人情報の紛失に関するお詫びとご報告(2026年3月12日更新)JR仙台病院 · 2026-11-09

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