Reopening of the MUJI online store postponed. It was found that there may have been unauthorized logins by third parties, resulting in a potential leak of information including approximately 27,260,000 email addresses and other personal data; partial leakage of credit card information was also confirmed. Upon reopening, users will be required to reset passwords; additional investigation and security enhancements will be implemented. 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It was found that there may have been unauthorized logins by third parties, resulting in a potential leak of information including approximately 27,260,000 email addresses and other personal data; partial leakage of credit card information was also confirmed. Upon reopening, users will be required to reset passwords; additional investigation and security enhancements will be implemented. A certain degree of potential impact on financial results is anticipated, but this remains undetermined.","jir_summary":"### Key points of the news\nToday, Ryohin Keikaku Co., Ltd. announced a postponement of the MUJI online store reopening and disclosed additional details of newly discovered unauthorized access. Due to a credential-stuffing type attack by a third party, there is a possibility that MUJI app and online store users' email addresses, birthdates, names, addresses, purchase histories and other information were exposed. Approximately 27,260,000 affected user records and about 1,090,000 credit card records (not full card numbers) have been identified as potentially impacted.\n\n### Future measures and impact\nAt reopening, all users will be required to reset their passwords. Comprehensive security measures will be further strengthened, and the reopening date will be announced once decided. A certain degree of potential impact on financial results is expected, but specific figures are not disclosed at this time.","jir_financial_highlights":"Impact on financial results: Unknown (The impact from this matter is under examination)\nOnline store reopening postponement: Unknown (Reopening timing TBD)","jir_category":"","jir_hashtags":"#NotAShareBuyback, #Security-Risk-DisclosureExpanded","jir_key_figures":"Number of affected individuals: approx. 27,260,000 cases (email address, birthdate, gender, member ID)\nCredit card information affected: approx. 1,090,000 cases (first 6 digits and last 2 digits of credit card number, MUJI Card ID, name)\nDelivery destination information affected: approx. 440,000 cases (recipient name, recipient postal code)","jir_meta_title":"Ryohin Keikaku: MUJI Online Store Reopening Postponed and Additional Unauthorized Access Report\uff5cNovember 2026","jir_meta_description":"Postponement of MUJI online store reopening due to newly discovered data breach. Potential exposure of approx. 27,260,000 personal records and approx. 1,090,000 credit card records. Password resets at reopening and security enhancements planned.","jir_og_title":"MUJI Online Store Reopening Postponed and Additional Report on Unauthorized Access","jir_og_description":"Announcement of MUJI online store reopening postponement. Potential unauthorized access by third parties may have impacted a wide range of personal data. Password resets will be required at reopening.","jir_og_image_url":"\/assets\/og\/company-general_ir.jpg","jir_chart_data_collection":"[]","ir_related_company":7422,"ir_release_date":"","ir_type":"","ir_is_new":false,"ir_document_url":"","jir_ir_type":"disclosure_update","footnotes":""},"sector":[],"importance":[],"class_list":["post-145831","ir_release","type-ir_release","status-publish","hentry"],"yoast_head":"\n