Overview
133,323 email addresses; names are not handled in that system. This stems from the Arara email-platform intrusion (recorded separately); the 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
- 業務委託先の利用サービスへの不正アクセスによる「&BIZ」登録のメールアドレス情報の漏えいに関するお詫びとお知らせ三井不動産株式会社 · 2026-11-09