Oriental Diamond: ransomware attack
On 4 May, a ransomware attack encrypted data on the head office file server of diamond and jewelry company Oriental Diamond, stopping work. Names, addresses and phone numbers it holds may have leaked; bank details, card data and My Number were not included. It said it will stop using the VPN the attackers came in through.
Disclosed
2026-05-12
Organizations involved
1
Leaked or at risk
Unknown
Downtime
Unknown
Timeline
- Detected 2026-05-04
- Disclosed 2026-05-12
- 8 days
Attack or cause
- Method
- [Ransomware]
- Impact
- [Data leak][Service outage]
- Entry point
- VPN device
Data exposed or at risk
Organizations involved
[Breached][Major]Tokyo, TaitoWholesale and retail trade
Oriental Diamond Co., Ltd.
Sources
- [1][Official]不正アクセスによるシステム障害および個人情報流出の可能性に関するお詫びとお知らせOriental Diamond · 2026-05-12