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high severity June 08, 2024 · 3 min read Unverified claim — what this is

Kadokawa Co Jp Listed by blacksuit Ransomware Group

If you are a customer of Kadokawa Co Jp, here’s what is being claimed, and what it would mean for you.

http://ng2gzceugc2df6hp6s7wtg7hpupw37vqkvamaydhagv2qbrswdqlq6ad.onion/dwango/

— from Blacksuit’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.
Kadokawa Co Jp Listed by blacksuit Ransomware Group

Kadokawa Co., Ltd., the Japanese media and publishing giant behind Dwango and Nico Nico Douga, was listed on the BlackSuit ransomware group’s leak site on June 08, 2024. The extortion actors claim to have exfiltrated internal files during a ransomware attack on the company’s systems. The listing does not specify the number of records affected or the exact data categories stolen, only that internal files were taken.

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Primary Disclosure Details

The BlackSuit leak site entry, accessible via the .onion link hosted on ransomware.live, states that Kadokawa suffered a ransomware intrusion and that attackers successfully exfiltrated internal files. No sample data is currently posted, and the disclosure provides no victim count or detailed inventory of the stolen material. The notification simply confirms the company as a victim and lists the incident under the group’s active campaigns. Public reporting on similar BlackSuit listings indicates that when actors reach this stage they have already encrypted systems and are now threatening to publish or sell the stolen data if ransom demands are not met.

Why This Matters for You and Your Family

Even though Kadokawa is a large corporation, individuals whose personal information appears in corporate internal files now face direct risk. Employee records, vendor contracts, customer support tickets, or partner agreements often contain names, addresses, dates of birth, email addresses, phone numbers, and sometimes government identification details. If any of that information belongs to you or a member of your household, it can be used for identity theft, targeted phishing, or sold on underground markets. The disclosure indicates the data was taken in a ransomware attack, which means it is now in the hands of profit-driven criminals who have every incentive to monetize it.

Doxxing and Identity-Chain Implications

Corporate breaches like this frequently create long identity chains. An email address exposed from a Kadokawa internal file can be cross-referenced with gaming accounts on Nico Nico Douga, forum handles, or linked social-media profiles. Once attackers map one piece of information to another, they can build a complete dossier that includes your home address, family members’ names, and even children’s online activity. Credential leaks of this type regularly cascade into account takeovers on gaming platforms, where stolen passwords grant access to valuable in-game purchases or private chats that reveal still more personal details. The result is accelerated doxxing that can affect every member of a household.

BlackSuit’s Known Track Record

Public reporting attributes the BlackSuit ransomware group’s emergence to mid-2023, when it began targeting organizations across North America, Europe, and Asia. The group is widely viewed as either a rebrand or successor to the earlier Royal ransomware operation. Notable prior victims include healthcare providers, manufacturing firms, and technology companies. BlackSuit’s typical playbook involves initial access through phishing or exploited remote desktop services, followed by lateral movement, data exfiltration, encryption of systems, and then dual-extortion pressure: demanding payment to decrypt files and a second payment to prevent publication of the stolen data. The group maintains a leak site where it posts victim names and, in many cases, proof files or partial data samples to increase pressure.

What to do

  • Run a DoxxScan to map every link between your handles, emails, phone numbers, and real identity so you can see exactly what this claimed breach connects to.
  • Rotate any password you used at Kadokawa, Dwango, or Nico Nico Douga anywhere it has been reused, and switch to a hardware-backed authenticator app for 2FA.
  • Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next exposure of your information is caught in hours rather than months.
  • Cover the household with DoxxScan family protection that extends to dependents and children’s gaming accounts that often chain back to the same breached corporate data.
  • Let DoxxScan remediation specialists handle data-broker takedown requests and other cleanup steps that most families lack time or expertise to manage alone.

The Kadokawa listing is a reminder that even well-known consumer-facing companies can become gateways to personal exposure for millions of ordinary users. Taking deliberate steps now limits what criminals can build from this and future incidents. DoxxScan by GalaxyWarden delivers continuous monitoring across 13.1 billion+ breach records and more than 100 platforms, AI-powered identity-chain mapping, hands-on remediation by specialists, and full household coverage that includes children’s gaming accounts. Start your DoxxScan trial today and close the gaps before the next leak appears.

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo
value redacted in this samplephone, household, property recordsBeenVerified
value redacted in this sample582 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach
unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

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Report details & sourcing

Severity High
Disclosed June 08, 2024
Last reviewed August 8, 2026
Affected Unconfirmed
Unverified claim — what this report is
This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.
Editorial & sourcing policy
GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.
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