Unauthorized access by a third party was confirmed on the consolidated subsidiary’s Onamae.com Desktop Cloud service. Up to 26,739 servers may be affected; login credentials for trading accounts and similar information may have been obtained. Payment information is not stored on the service. Reopening timing is TBD, and the impact on financial results is undetermined. Consultation with the police and ongoing investigation are being conducted.<\/p>\n","protected":false},"comment_status":"open","ping_status":"closed","template":"","meta":{"Ticker":"","DATE":"","longName":"","company_name_ja":"","fullTimeEmployees":0,"address":"","phone":"","website":"","industry":"","sector":"","regularMarketPrice":0,"financialCurrency":"","marketCap":0,"fiftyTwoWeekLow":0,"fiftyTwoWeekHigh":0,"epsTrailingTwelveMonths":0,"epsForward":0,"bookValue":0,"totalRevenue":0,"OperatingIncome":0,"operatingMargins":0,"NetIncome":0,"profitMargins":0,"ebitda":0,"trailingPE":0,"forwardPE":0,"priceToBook":0,"returnOnEquity":0,"recommendationMean":0,"recommendationKey":"","targetMeanPrice":0,"numberOfAnalystOpinions":0,"analyst_earnings_data":"","dividendRate":0,"dividendYield":0,"payoutRatio":0,"totalEsg":0,"environmentScore":0,"socialScore":0,"governanceScore":0,"title":"","providerPublishTime":"","link":"","longBusinessSummary":"","longBusinessSummary_ja":"","quarterly_revenue":0,"quarterly_net_income":0,"quarterly_operating_profit":0,"enterprise_value":0,"price_fetched_at":"","company_officer_1_name":"","company_officer_1_title":"","company_officer_2_name":"","company_officer_2_title":"","company_officer_3_name":"","company_officer_3_title":"","company_officer_4_name":"","company_officer_4_title":"","company_officer_5_name":"","company_officer_5_title":"","company_officers_update_time":"","get_dividend_history_year1":0,"get_dividend_history_year2":0,"get_dividend_history_year3":0,"get_dividend_history_year4":0,"get_dividend_history_year5":0,"get_dividend_history_year6":0,"get_dividend_history_year7":0,"get_dividend_history_year8":0,"get_dividend_history_year9":0,"get_dividend_history_year10":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"jir_stock_code":"9449","jir_company_name":"GMO internet group, Inc.","jir_importance":"\u2605\u2605\u2605\u2606\u2606","jir_publication_date":"2026-10-23","jir_source_link":"https:\/\/japanir.jp\/wp-content\/uploads\/2026\/10\/9449-20261023-01.pdf","jir_short_summary":"Unauthorized access by a third party was confirmed on the consolidated subsidiary's Onamae.com Desktop Cloud service. Up to 26,739 servers may be affected; login credentials for trading accounts and similar information may have been obtained. Payment information is not stored on the service. Reopening timing is TBD, and the impact on financial results is undetermined. Consultation with the police and ongoing investigation are being conducted.","jir_summary":"### Overview and Incident\nUnauthorized access by a third party was confirmed on Onamae.com Desktop Cloud provided by a consolidated subsidiary of GMO internet group, Inc. Login information for trading accounts and other data stored on servers may have been obtained and misused by a third party. The situation is under investigation; as of October 23 at 16:00, servers across all plans remain suspended. Payment information is not retained on the service's servers.\n\n### Response and Next Steps\nThe company continues to suspend servers for all plans, is conducting an investigation with a security specialist firm, and has consulted with the police. Customers have been advised to change authentication information, terminate login sessions, and enable two-factor authentication. New facts will be disclosed as they emerge. The impact on consolidated financial results is currently undetermined.","jir_financial_highlights":"Servers potentially affected: 26,739 cases (Potential case count at time of announcement)\nAffected service: Onamae.com Desktop Cloud (all plans) (Announced as the scope of impact)","jir_category":"","jir_hashtags":"#CorporateInformationSecurity, #DisclosedInformation, #CyberRisk","jir_key_figures":"Servers potentially affected: 26,739 cases (potential case count at time of announcement; unauthorized access not confirmed for all)\nAffected service: Onamae.com Desktop Cloud (all plans)\nPayment information: Payment information including credit card details is not stored","jir_meta_title":"GMO internet group, Inc. \u2014 Notice of Unauthorized Access to Consolidated Subsidiary\uff5cOctober 23, 2026","jir_meta_description":"Unauthorized access occurred on a service provided by a consolidated subsidiary of GMO internet group, Inc. Up to 26,739 servers may be affected and trading account information may have been misused. Investigation is ongoing and impact on earnings is undetermined. Police have been consulted; resumption timing is TBD.","jir_og_title":"GMO internet group, Inc. \u2014 Notice Regarding Unauthorized Access","jir_og_description":"Unauthorized access by a third party was confirmed on a consolidated subsidiary's service. Up to 26,739 servers may be affected; payment information is not impacted. Updates on the investigation will be published as they become available.","jir_og_image_url":"\/assets\/og\/company-general_ir.jpg","jir_chart_data_collection":"[]","ir_related_company":7972,"ir_release_date":"","ir_type":"","ir_is_new":false,"ir_document_url":"","jir_ir_type":"disclosure_update","footnotes":""},"sector":[],"importance":[],"class_list":["post-134075","ir_release","type-ir_release","status-publish","hentry"],"yoast_head":"\n