This record tracks a ransomware attack claimed by the
kawa4096 group against
**********-*******.co.jp. 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.
-65days
t1 · Published
t2 · Disclosed
Disclosed / Notified
Apr 23, 2025
Attack Summary
**********-*******.co.jp
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 co.jp
— indexed by HaveIBeenRansom.
212,176
found in Infostealer logs
2,999+
found in Traditional breaches
1+
found in Ransomware leaks
2844Breaches_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
AntiPublic_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
Twitter Full DB.part01.rar
Database World ROC · breach
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
MySpace_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Leaked Database Archive_2.7z.001
formaceft_db · breach
••• emails
+ 17 more leak sources locked
Leak volumes are 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.