It was found that unauthorized access to a subsidiary’s member information management system may have resulted in the leakage of up to approximately 6,430,000 member records. Credit card information is not affected. 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Credit card information is not affected. Additional investigations and recurrence prevention measures are currently underway.","jir_summary":"### Overview of the Incident and Current Status\nBookoff Group Holdings Limited announced that it confirmed unauthorized access by a third party to a membership management system provided by a subsidiary and that acquisition of member information was identified. Although up to approximately 6,430,000 member records may be affected, no public information or payment information leakage has been confirmed at this time, and the data includes hashed passwords. The company is currently investigating the cause, monitoring, implementing recurrence prevention measures, and reporting to the Personal Information Protection Commission.\n\n### Response Policy and Future Outlook\nThe company has blocked the unauthorized access, corrected vulnerabilities, and disconnected external access, and has conducted an urgent comprehensive inspection of all systems. Additional security measures and permanent recurrence prevention measures will be implemented, and investigation results will be communicated to affected customers sequentially. The company will promptly disclose any new facts as they become known.","jir_financial_highlights":"Number of member records potentially leaked: Up to approx. 6,430,000 shares (Unknown)\nTypes of information potentially leaked: Full name, date of birth, gender, email address, phone number, postal code and address, hashed password values, point card number, membership number (Unknown)\nPayment information: Not included (Unknown)","jir_category":"","jir_hashtags":"#BookoffGroupHoldings, #InformationSecurity, #PersonalDataLeakPrevention","jir_key_figures":"Number of member records potentially leaked: Up to approx. 6,430,000 shares\nTypes of information potentially leaked: Full name, date of birth, gender, email address, phone number, postal code and address, hashed password values, point card number, membership number\nPayment information: Not included","jir_meta_title":"Bookoff Group Holdings Limited \u2014 Notice of Member Information Leak Due to Unauthorized Access | October 2026","jir_meta_description":"Bookoff Group Holdings Limited disclosed unauthorized access to a subsidiary's membership management system. Up to 6,430,000 member records may be affected. Payment information is not included. This notice outlines current responses and planned recurrence prevention measures.","jir_og_title":"Bookoff Group Holdings Limited \u2014 Notice of Member Information Leak","jir_og_description":"Unauthorized access to a subsidiary's membership management system may have affected up to 6,430,000 member records. Payment information is not included. Investigation and recurrence prevention measures are underway.","jir_og_image_url":"\/assets\/og\/company-general_ir.jpg","jir_chart_data_collection":"[]","ir_related_company":57249,"ir_release_date":"","ir_type":"","ir_is_new":false,"ir_document_url":"","jir_ir_type":"disclosure_update","footnotes":""},"sector":[],"importance":[],"class_list":["post-128675","ir_release","type-ir_release","status-publish","hentry"],"yoast_head":"\n