Overview
No published headcount (blank).
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
- 個人情報漏えいの可能性に関するお知らせとお詫び五大開発株式会社 · 2026-11-09
- 不正アクセス発生に関するお詫びとパスワード変更のお願い五大開発株式会社 · 2026-11-09