Published the third report regarding a member information leak caused by unauthorized access. The scope of impact remains the same as the previous report; approximately 6,382,000 affected members. No leakage of credit\/banking information has been confirmed at this time, and recurrence prevention measures have been strengthened. 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The scope of impact remains the same as the previous report; approximately 6,382,000 affected members. No leakage of credit\/banking information has been confirmed at this time, and recurrence prevention measures have been strengthened. Impact on financial results is currently limited, but expense recognition is expected from the second quarter of fiscal 2027 onward.","jir_summary":"### Overview and Background\nThis is the third report, published in October 2026, regarding the personal data leak due to unauthorized access, updating investigation results and response status. This disclosure confirms no change to the range of affected services or scope; the information that may have been leaked is primarily member information (name, date of birth, email address, etc.), and payment information is not included.\n\n### Recurrence Prevention and Response\nThe group continues to implement security measures across the organization, including blocking the unauthorized access route, strengthening authentication and authorization, enhancing monitoring, and reinforcing verification processes including third-party assessments. The company will continue to strengthen monitoring and detection capabilities and enhance security governance.","jir_financial_highlights":"Costs related to this incident: Unknown (Expected to be recognized from Q2 of fiscal 2027)\nImpact on revenue: Unknown (Stated that the impact on revenue from this incident is limited)","jir_category":"","jir_hashtags":"#BookoffGroup, #MaterialDisclosureUpdate","jir_key_figures":"Number of affected member data records: 6,427,735 cases\nNumber of affected individuals: 6,383,279 people\nCategories of member information involved: name, date of birth, gender, occupation, nickname, email address, phone number, address, password hash values, loyalty card number, membership number","jir_meta_title":"Bookoff Group Holdings Limited Third Report on Unauthorized Access\uff5cScope of Impact and Recurrence Prevention Measures","jir_meta_description":"Third report from Bookoff Group Holdings Limited on a personal data leak caused by unauthorized access. Summarizes number of affected members, types of potentially leaked information, and recurrence prevention measures. Expense recognition expected from Q2 fiscal 2027; revenue impact described as limited.","jir_og_title":"Bookoff Group Holdings Limited Publishes Third Report on Unauthorized Access","jir_og_description":"Published the third report on a personal data leak due to unauthorized access. Scope remains the same as the prior report and impact is limited. Strengthening recurrence prevention measures and expanding monitoring.","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-144238","ir_release","type-ir_release","status-publish","hentry"],"yoast_head":"\n