Overview
The notice gives "about 444,000" (as of 9:00 on November 6); count left blank. Policy numbers, names, addresses, phones, emails, portal IDs, a few cardholder names with last four digits, and partial bank details were involved.
Timeline
- Occurred
- Discovered
- Disclosed
Service suspension notice.
Leak confirmed.
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
- 当社システムへの不正アクセスに伴う情報漏えいについてあいおいニッセイ同和損害保険株式会社 · 2026-11-09