> JapanHacked_
[Contained][Severity: Critical][Ransomware]

Shinchosha: ransomware attack

A June 27 intrusion through a network-device vulnerability led to encryption and theft. December's final report separately categorized confirmed and possible exposures, with possible duplicate individuals. Confirmed leakage in outsourced investigations comprised about 89,000 identifier-only entries, 12,500 identifier/name entries and 1,200 entries containing medical information; other categories included possible exposures. No secondary harm was confirmed.

Disclosed

2025-07-11

Organizations involved

1

Leaked or at risk

89K

89,000

Downtime

Unknown

Timeline

  1. Detected 2025-06-27
  2. Disclosed 2025-07-11
  3. 14 days

Organizations involved

Open in organization search

Sources

  1. [1][Official]不正アクセスに関するご報告とお詫びShinchosha Inc. · 2025-07-11
  2. [2][Official]不正アクセスに関する最終報告Shinchosha Inc. · 2025-12-05