2026-11-15
Unauthorized access to Yamada Denki's renovation management system (up to 3.5 million records): names, addresses, phone numbers, renovation history and quotes may be affected — what customers should do
On November 13, 2026, Yamada Denki Co., Ltd. announced that its renovation management system had been accessed without authorization by a third party. It confirmed the access on November 12, immediately blocked access from outside and began a detailed investigation. The personal information that may have been affected is that of customers registered in the system: name, address, phone number and other sales records such as renovation history and quotation data, for up to 3.5 million records. My Number and credit card information are not included, and information unrelated to renovation (such as appliance purchases in stores or on the online shop) is outside the scope. Whether customer information was leaked outside is still under investigation, and the company says it will announce further developments. As of November 15, 2026, no follow-up has been found. Our conclusion: this is not yet a confirmed leak, but be wary of emails, texts and calls pretending to be Yamada Denki, and remember that the company says it never asks for passwords or PINs by email or phone.