TOKYO, Apr 23 (Pulse News Wire) – Yellow Hat Ltd. (9882.T) disclosed today that personal data of members of its subsidiary, 2rinkan Yellow Hat Co., Ltd., might have been leaked due to a cyberattack involving malicious software on their member-exclusive server.
The incident was detected on April 23, 2026. Following the discovery, the company immediately disconnected the affected server from the network and initiated an investigation. It was found that customer information such as names, addresses, phone numbers, birthdates, genders, email addresses, membership IDs, point balances, and app user IDs could potentially have been exposed. However, credit card information stored separately was confirmed safe from leakage. In response to the breach, Yellow Hat Ltd. temporarily halted certain services of the 2rinkan app while implementing measures to prevent future incidents.
The company plans to conduct external investigations and seek expert advice to strengthen security protocols. Additionally, they will report the issue to the Personal Information Protection Commission and consult with local police authorities. Notifications will also be sent via the 2rinkan website and stores, along with individual emails to affected customers. Yellow Hat Ltd. stated that they are preparing a dedicated customer consultation hotline and will announce its availability once operational through their respective websites. Any significant impact on performance will be promptly disclosed.
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