TOKYO, Feb 19 (Pulse News Wire) – K.uno Co., LTD. (259A.T) disclosed today that a potential data breach occurred following unusual activity on its website on December 29, 2025.
An external specialist agency confirmed that backdoor files had been uploaded to the company’s servers, potentially allowing unauthorized access to internal data. The affected personal information includes names, kana names, addresses, email addresses, phone numbers, passwords, and purchase histories for customers who registered between July 14, 2021, and December 29, 2025. A total of 170,000 records are impacted. The company emphasizes there is no evidence of credit card information being compromised.
In response, K Uno urges all affected users to immediately reset their passwords to prevent secondary harm. Individual notifications have been sent out to those whose data was potentially exposed; however, direct communication could not be established with some individuals due to missing contact information. Going forward, the firm is implementing enhanced security measures and internal management reforms based on expert advice to prevent recurrence. There are currently no plans to revise earnings forecasts related to this incident.
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