Cybersecurity articles tagged #Japan on RuntimeRebel.https://runtimerebel.comhttps://runtimerebel.com/blog/sakura-internet-breach-exposes-1-36-million-accountshttps://runtimerebel.com/blog/sakura-internet-breach-exposes-1-36-million-accountsJapanese cloud provider Sakura Internet discloses a data breach exposing customer contract and membership data for up to 1.36 million accounts.Thu, 20 Aug 2026 08:27:44 GMTSakura InternetData BreachJapanCloud ProviderSales Management Systemhttps://runtimerebel.com/blog/ransomware-attack-freezes-japanese-food-supply-chain-operationshttps://runtimerebel.com/blog/ransomware-attack-freezes-japanese-food-supply-chain-operationsA ransomware attack on a Japanese food and logistics firm severely disrupted frozen food supply to thousands of clients, including KFC. Analyze the impact.Thu, 23 Jul 2026 02:52:03 GMTRansomwareSupply Chain AttackFood SectorJapanLogisticshttps://runtimerebel.com/blog/nihon-kotsu-cyberattack-system-shutdowns-affect-japan-s-largest-taxi-operatorhttps://runtimerebel.com/blog/nihon-kotsu-cyberattack-system-shutdowns-affect-japan-s-largest-taxi-operatorJapan's largest taxi operator, Nihon Kotsu, confirmed a cyberattack forced system shutdowns. This analysis covers the incident's impact and mitigation.Mon, 13 Jul 2026 20:58:36 GMTNihon KotsuCyberattackTaxi OperatorJapanSystem ShutdownIncident Responsehttps://runtimerebel.com/blog/aflac-japan-data-breach-exposes-customer-financial-datahttps://runtimerebel.com/blog/aflac-japan-data-breach-exposes-customer-financial-dataAflac Japan subsidiary data breach exposed personal and bank account details for an undisclosed number of customers. Review impact and mitigation.Tue, 30 Jun 2026 12:49:32 GMTAflacData BreachFinancial SectorJapanPersonal InformationBank Account Informationhttps://runtimerebel.com/blog/kddi-data-breach-exposes-14-2-million-email-logins-across-six-ispshttps://runtimerebel.com/blog/kddi-data-breach-exposes-14-2-million-email-logins-across-six-ispsKDDI Corporation reports a massive data breach affecting 14.2 million email accounts across six Japanese ISPs following unauthorized shared system access.Sun, 28 Jun 2026 16:32:11 GMTKDDIISPCredential TheftJapanTelecommunicationshttps://runtimerebel.com/blog/kyuden-data-breach-physical-loss-of-10-9-million-customer-recordshttps://runtimerebel.com/blog/kyuden-data-breach-physical-loss-of-10-9-million-customer-recordsKyushu Electric Power reports the physical loss of a hard drive containing personal data of over 10.9 million customers during a disposal transport process.Fri, 12 Jun 2026 01:06:28 GMTKyushu Electric PowerPhysical SecurityJapanPII LeakData Losshttps://runtimerebel.com/blog/ai-assisted-attacks-lessons-from-the-kaikatsu-club-data-breachhttps://runtimerebel.com/blog/ai-assisted-attacks-lessons-from-the-kaikatsu-club-data-breachAnalyze the 2025 Kaikatsu Club breach where AI-assisted malicious code allowed a teenager to steal 7 million user records, signaling a new era of cyber threats.Mon, 04 May 2026 12:41:59 GMTAI Assisted AttacksKaikatsu ClubData BreachJapanCybercrimehttps://runtimerebel.com/blog/claude-mythos-analyzing-ai-threat-rumors-in-japan-finance-sectorhttps://runtimerebel.com/blog/claude-mythos-analyzing-ai-threat-rumors-in-japan-finance-sectorAn investigation into the Claude Mythos panic in Japan's financial sector and how security experts distinguish between AI hype and actual cyber risks.Thu, 30 Apr 2026 05:12:59 GMTClaude MythosAnthropicJapanAdversarial AIFinancial Serviceshttps://runtimerebel.com/blog/tropic-trooper-apt-targets-home-routers-and-japanese-infrastructurehttps://runtimerebel.com/blog/tropic-trooper-apt-targets-home-routers-and-japanese-infrastructureTropic Trooper expands operations to target Japanese entities and home routers using specialized malware like Chinoiserie to obfuscate attack origins.Fri, 24 Apr 2026 05:07:08 GMTTropic TrooperKey BoyJapanSOHOChinoiserieEspionagehttps://runtimerebel.com/blog/microsoft-10b-investment-advancing-japan-s-ai-and-cybersecurityhttps://runtimerebel.com/blog/microsoft-10b-investment-advancing-japan-s-ai-and-cybersecurityMicrosoft commits $10 billion to Japan for AI infrastructure and cybersecurity, focusing on sovereign AI requirements and national digital resilience.Wed, 15 Apr 2026 05:02:15 GMTMicrosoftJapanSovereign AICloud InfrastructureCybersecurity Partnershiphttps://runtimerebel.com/blog/chinese-police-use-chatgpt-in-influence-operations-against-japanhttps://runtimerebel.com/blog/chinese-police-use-chatgpt-in-influence-operations-against-japanChinese police reportedly used ChatGPT for politically motivated influence operations to smear Japan's PM Takaichi, highlighting AI's role in disinformation campaigns.Thu, 26 Feb 2026 00:33:49 GMTChatGPTInfluence OperationsDisinformationNation StateChinaJapanAICyber Espionage