Overview
380,536 unique email addresses only. Names, trading data and passwords were not registered. Active-customer breakdown still being checked. Per the company, this stems from unauthorised access to the Arara email-delivery platform (recorded separately); this figure is a subset of the vendor scope and must not be added to it.
Timeline
- Occurred
- Discovered
- 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
- 業務委託先（アララ株式会社）への不正アクセスに伴う情報流出について（第2報・2026年11月4日）株式会社カイカエクスチェンジ · 2026-11-09
- 業務委託先（アララ株式会社）への不正アクセスに伴う情報流出の可能性について株式会社カイカエクスチェンジ · 2026-11-09