Investigating

Chikyosai: RIZAP generative-AI misuse may have exposed 726 members’ data

Possible data leak: After RIZAP reported an unapproved generative-AI upload, disclosed Sep 4, 2026. 726 people across 14 branches. Cards/accounts/credentials out of scope.

Last updated: 2026-11-09

Overview

726 people.

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. 委託先における個人情報漏えいの可能性のある事案の発生について地方職員共済組合 · 2026-11-09

Related information

rizap-health-guidance-generative-ai-upload-possible-leak-2026

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