【NEWS RELEASE】
July 2, 2024
KADOKAWA CORPORATION

Further Criminal Declaration by the Perpetratorsand the KADOKAWA Group's Response Concerning
Information Leakage Caused by the Ransomware Attack
KADOKAWA CORPORATION (Headquarters: Chiyoda-ku, Tokyo; Chief Executive Officer: Takeshi
Natsuno; hereinafter “KADOKAWA”) expresses deep apologies for the significant inconvenience and troublecaused to its readers, users, writers, creators, business partners, shareholders, investors, and otherstakeholders by the system failure currently affecting the KADOKAWA Group.
After the discovery of a significant cyberattack including ransomware on servers located in the data
center targeting Niconico and the related services, the KADOKAWA Group promptly established a task force
and commenced an ongoing investigation into the possibility of information leakage with assistance including
external professional organizations
In the process, KADOKAWA announced on June 28 that the organization claiming to have carried out theransomware attack had leaked some data held by the KADOKAWA Group, and following thisannouncement, on July 2, we confirmed that the organization claimed to have leaked more information heldby the KADOKAWA Group.
We are currently investigating the authenticity of the claims the organization has made, but we expect that
it will take considerable time to verify their accuracy. We will do our utmost to obtain accurate facts as soon
as possible. Meanwhile, we expect to receive the results of investigations by external professionalorganizations by the end of July. As soon as the results of these investigations are known, we shall promptly
report them to the public. We sincerely apologize for any concern this may cause, but we ask for yourcontinued patience. As previously announced, KADOKAWA does not itself store credit card information on
KADOKAWA Group customers, including customers of Niconico services. This structure prevents theleakage of this information from KADOKAWA.
Be aware that accessing or downloading data files from websites which the organization claims to haveattacked comes with risks, such as malware infection. Although we are currently investigating what theorganization claims as described above, we ask for your understanding and cooperation in refraining fromsharing the leaked information on social media or elsewhere, as the spread of this personal information could
have serious repercussions by infringing upon privacy.
The police have already begun an investigation into this case. In addition, KADOKAWA is providing therelevant authorities with necessary reports. As previously reported, the KADOKAWA Group's businessactivities have been affected to a certain extent, but we shall stand firm in our response rather than give in tosuch criminal acts.
Meanwhile, we take this situation very seriously. While proceeding with a more in-depth investigation of
the cause, we will further strengthen our information security systems to prevent a recurrence.
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KADOKAWA reiterates its deepest apologies to our customers and all those concerned for theconsiderable inconvenience and trouble this matter has caused.
<Dedicated Helpdesk for Information Leakage Inquiries*>
https://qa.nicovideo.jp/helpdesk?category_id=982&faq_id=22764&site_domain=default*Japanese only
End of document

For media inquiries, please contact:
Investor and Public Relations Division, KADOKAWA CORPORATION
Email: pr-dept@kadokawa.jp

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