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Listed on a ransomware leak site

KOIKE Sanso Kogoyo Co. Ltd.

koike-japan.com

KOIKE Sanso Kogoyo Co. Ltd. was listed on the Exitium leak site on Oct 10, 2026. Information as of Oct 19, 2026.

Country: JapanIndustry: Manufacturing
Updated continuously · figures as of Oct 19, 2026
Claimed by
Exitium
First listed
Oct 10, 2026
Claims recorded
1

Leak-Site Claim.

ExitiumConfirmed claim
Posted on the leak site
Oct 10, 2026
Collected by Brandefense
Oct 10, 2026
Data claimed
5.8 TB
Leak-site post text, written by the group
Website: koike-japan.com You have time until Tuesday(10.13.2026). If you wouldn't contact us we will start selling data. We have 5.8 TB of data: agreements confidential data correspondence files all customers and clients data engineering drawings AND MUCH MORE... Contact us until your time runs out.

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Figures as of Oct 19, 2026. Confirmed leak-site claims collected by Brandefense technologies and validated by Brandefense analysts.

Listed on a leak site means a ransomware group has claimed the company; it is not a confirmed breach. To request a correction or removal, contact Brandefense.