Oriental Diamond
About the organisation
orientaldiamond.jp Oriental Diamond Inc. is a pioneering Japanese diamond enterprise established in 1966, specializing in the import, design, and manufacturing of fine diamond jewelry and loose stones. As the first company in Japan to earn the prestigious Sightholder qualification, they combine global sourcing with in-house craftsmanship to deliver conflict-free diamonds and elegant collections like Hoshi no Suna. With a heritage of excellence and a diversified portfolio spanning jewelry, bridal, and traditional kimono wholesale, they continue to innovate as a trusted market leader in Tokyo's luxury sector
What the listing means
Oriental Diamond appeared on the thegentlemen leak site on 12 May 2026. Groups publish a victim once negotiations stall or as pressure during them, so a listing usually means data was already exfiltrated. This group has published 134 claims in the last 30 days and remains active.
Recommended actions
- Treat any unsolicited message referencing Oriental Diamond as suspicious — leaked data gets weaponised for phishing within days.
- If you hold an account on orientaldiamond.jp, change that password now, update it anywhere you reused it, and enable two-factor authentication.
- Other Manufacturing organisations should review this group's known TTPs and validate detection coverage against them.
- Watch for follow-on extortion: stolen data is often re-leaked or resold after the initial listing.
- A leak-site listing is a claim made by the attacker, not a confirmed breach — check the organisation's own disclosures before acting on it.
Leak-site evidence
Listing URL https://www.ransomware.live/id/T3JpZW50YWwgRGlhbW9uZEB0aGVnZW50bGVtZW4=