This record tracks a ransomware attack claimed by the
thegentlemen group against
TOA. It collects the publicly disclosed attack details — sector, location and
timeline — as published on the operator's leak site and indexed by Breach House.
Window Zero
EXPOSURE GAP
Window Zero is the time the breach stayed in the open before
anyone said so — the gap between when the attack was first discovered
on the operator's leak site (t1) and when it was publicly disclosed (t2).
The wider this window, the longer victims, staff and customers were exposed with no warning.
0days open
t1 · Published
t2 · Pending
Published
August 14, 2026
Disclosed / Notified
Not disclosed yet
Attack Summary
toa-const.co.jp zoominfo.com/c/toa-corp/425840057 TOA Corporation is a prominent Japanese general contractor specializing in marine civil engineering, land reclamation, and port infrastructure development. The company focuses on delivering high-quality, economically viable construction projects while prioritizing environmental sustainability and technological innovation. Through its corporate portal, stakeholders can access detailed information on their advanced engineering services, corporate philosophy, and investor relations.
Leak Screenshots
SAMPLE
Proof-of-breach screenshots the operator posted from the stolen data. Previews are
redacted and locked — the originals are available on HaveIBeenRansom.
Dark Web Exposure
Findings for toa-const.co.jp
— indexed by HaveIBeenRansom.
3
found in Infostealer logs
541+
found in Traditional breaches
1+
found in Ransomware leaks
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
2844Breaches_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
ANTIPUBLIC #1.tar.zip.001
DBs Backup · breach
••• emails
Japan.rar
🇷🇺Alexei Error504🇷🇺 · breach
••• emails
Dailymotion_BF.7z
TheUnderground - Reborn · breach
••• emails
AntiPublic_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
+ 17 more leak sources locked
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Legal Disclaimer:
This ransomware victim record reflects information published on the operator's leak site.
Breach.house does not acquire, download, host, access or redistribute unlawfully obtained data. It indexes only publicly visible information posted by ransomware, breach and infostealer operators and open web sources, without accessing the underlying stolen content. The service supports public awareness, legitimate research and cyber-resilience.