Ryohin Keikaku disclosed new facts and response measures regarding a possible information leak affecting the MUJI app and MUJI online store. Up to approximately 27,260,000 email addresses and other data may be involved; a portion of credit card information may also be affected. 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Up to approximately 27,260,000 email addresses and other data may be involved; a portion of credit card information may also be affected. Impact is currently considered limited; effects on financial results remain undetermined and investigation is ongoing.","jir_summary":"### Summary and Key Points of the Incident\nFollowing the November 30, 2026 announcement regarding a possible customer information leak in the MUJI app, further investigation revealed that MUJI online store users may also be affected. The potentially impacted information includes email addresses, dates of birth, gender, member IDs, etc., potentially affecting up to approximately 27,260,000 items. In addition, about 520,000 items that may include names, addresses and telephone numbers could be involved. Some credit card information for MUJI Card issued by Credit Saison may also be within the scope. No fraudulent use has been confirmed at this time, and investigation to determine the cause and scope of impact is ongoing.\n\n### Impact and Future Measures\nThe Company states that it currently expects the impact on business performance to be limited and that there is no direct effect on store operations or online store business activities. Affected individuals will be contacted individually, and the Company will coordinate with card issuers to strengthen prevention measures and monitoring. MUJI Card holders who wish to have their cards reissued should contact Credit Saison. The Company will promptly disclose any new information as it becomes available.","jir_financial_highlights":"Net Sales: Unknown (Unknown)\nImpact on Consolidated Results: Unknown (Unknown)\nImpact from Fraudulent Use: Unknown (Unknown)","jir_category":"","jir_hashtags":"#RyohinKeikakuInformationLeak, No share buyback required, No board personnel changes required","jir_key_figures":"Up to approximately 27,260,000 shares: Information that may have been leaked\nApproximately 520,000 shares: May include names, addresses and telephone numbers\nApproximately 120 shares: Credit card information (first 6 digits + last 2 digits, cardholder name) potentially viewable","jir_meta_title":"Ryohin Keikaku Co., Ltd. \u2013 Notice Regarding Possible Information Leak\uff5cNovember 2026","jir_meta_description":"Ryohin Keikaku announced new facts regarding a possible customer information leak related to MUJI services. The potential scope may involve up to approximately 27,260,000 data items and may include some credit card information. Impact on financial results is currently undetermined and investigation continues.","jir_og_title":"Ryohin Keikaku Co., Ltd. \u2013 Notice Regarding Possible Information Leak\uff5cNovember 2026","jir_og_description":"Newly identified risk of information leakage from MUJI official app and online store. Up to approximately 27,260,000 data items may be affected. Company states impact on results is currently limited.","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-141392","ir_release","type-ir_release","status-publish","hentry"],"yoast_head":"\n