East
About the organisation
east-inc.jp zoominfo.com/c/east/5000054099 East Inc. is a Japanese company headquartered in Tokyo that provides comprehensive outsourcing services for commercial facilities — shopping malls, outlet parks, and office complexes — covering everything from day-to-day operations to system development, website management, and information services. The company has an impressive track record of over 800 commercial facilities nationwide across Japan, with clients including Roppongi Hills, Nihonbashi Takashimaya S.C., Mitsui Outlet Parks, and Ebisu Garden Place. Since 2007, East Inc. has also been supporting Japanese companies expanding into China, offering systems and operational know-how for overseas operations
What the listing means
East appeared on the thegentlemen leak site on 06 May 2026. Groups publish a victim once negotiations stall or as pressure during them, so a listing usually means data was already exfiltrated — the attack itself is dated 24 April 2026, 12 days before the listing. This group has published 134 claims in the last 30 days and remains active.
Recommended actions
- Treat any unsolicited message referencing East as suspicious — leaked data gets weaponised for phishing within days.
- If you hold an account on east-inc.jp, change that password now, update it anywhere you reused it, and enable two-factor authentication.
- 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/RWFzdEB0aGVnZW50bGVtZW4=