https://pwnsy.com/tools/cyber-watch/japan/Sourced cyber incidents and official statements, from pwnsy Cyber Watch.enSun, 08 Nov 2026 00:00:00 +0000https://english.adnkronos.com/2026/11/06/japan-police-agency-launches-nationwide-data-breach-probe-hq/a47aba0395d01c1eFri, 06 Nov 2026 00:00:00 +0000National Police Agency set up a nationwide joint investigation headquarters for cyberattacks since January 2026 that caused large data breaches.https://pwnsy.com/tools/cyber-watch/japan/#all04bd64ab4be2cfabWed, 04 Nov 2026 00:00:00 +0000President Yoshiaki Maeda said unauthorized access breached up to about 300,000 sets of personal information, including names, addresses, ID document numbers and bank account numbers, and the My docomo service was suspended. Sources: https://english.adnkronos.com/2026/11/06/ntt-docomo-chief-says-personal-info-breached-in-cyberattack/https://pwnsy.com/tools/cyber-watch/incidents/amadeus-airline-data-breach/8cc6de331900f74eWed, 04 Nov 2026 00:00:00 +0000Eight airlines in six countries confirmed customer data exposure through Amadeus in 2026, including Malaysia Airlines and Singapore Airlines. Dates, figures and sources.https://pwnsy.com/tools/cyber-watch/incidents/ntt-docomo-data-breach/01d705bfe45e6dccWed, 04 Nov 2026 00:00:00 +0000NTT Docomo says unauthorised access to My docomo and its online shop exposed up to about 300,000 sets of personal data in November 2026.https://pwnsy.com/tools/cyber-watch/japan/#allf2ee944db36968d5Thu, 29 Oct 2026 00:00:00 +0000ANA said unauthorized access at its reservation contractor Amadeus may have exposed customer personal information. Sources: https://www.visaverge.com/travel/amadeus-cyberattack-exposes-passenger-data-at-four-asian-carriers/, https://www.bleepingcomputer.com/news/security/japan-airlines-suffers-third-party-data-breach-exposing-passenger-info/https://pwnsy.com/tools/cyber-watch/japan/#all1e83a2b38c61843aWed, 28 Oct 2026 00:00:00 +0000JAL said unauthorized access to the Amadeus passenger service system exposed reservation data of about 92,000 JAL and Japan Transocean Air customers, about 2,000 of them with passport numbers. Sources: https://www.bleepingcomputer.com/news/security/japan-airlines-suffers-third-party-data-breach-exposing-passenger-info/, https://therecord.media/japan-airlines-warns-of-breach-country-grapples-with-incidentshttps://pwnsy.com/tools/cyber-watch/japan/#all3c0d25b525cabfa4Tue, 27 Oct 2026 00:00:00 +0000NTT Docomo said unauthorised access to a member database server at contractor Sony Network Communications (So-net) exposed 443,495 records of current and former plala (S course) customers: names, phone numbers, birth dates, gender, So-net email addresses and login IDs. Passwords, cards and bank details were not included. Sources: https://smhn.info/202610-docomo-hikari-plala-s-course-sonet-data-breach, https://selectra.jp/money/news/docomo-hikari-rouei-20261029https://therecord.media/japan-airlines-warns-of-breach-country-grapples-with-incidentsf7a190a6dac3075fMon, 26 Oct 2026 00:00:00 +0000Prime Minister Sanae Takaichi promised emergency measures against cyberattacks, calling the situation serious.https://pwnsy.com/tools/cyber-watch/japan/#all96eae48a2f33a66dWed, 07 Oct 2026 00:00:00 +0000The SoftBank cloud subsidiary said a third-party ransomware attack hit its East Japan Region 1, affecting 495 companies and local governments that use the service. Sources: https://www.bleepingcomputer.com/news/security/ransomware-attack-disrupts-japans-idcf-cloud-used-by-govt-clients/https://pwnsy.com/tools/cyber-watch/japan/#all38830d52e812a7b6Sat, 26 Sep 2026 00:00:00 +0000Keio confirmed a ransomware attack on its group servers that disrupted business systems, mainly in its hotel business, and reported it to police. Sources: https://www.bleepingcomputer.com/news/security/japans-keio-confirms-ransomware-attack-disrupted-business-systems/https://pwnsy.com/tools/cyber-watch/japan/#all9d1408ced5c20940Fri, 11 Sep 2026 00:00:00 +0000The Digital Agency said a third party used a VPN flaw to access its staff system, possibly exposing about 246,000 records on government employees and related contacts. Sources: https://www.bleepingcomputer.com/news/security/japans-digital-agency-says-vpn-flaw-exposed-246-000-personnel-records/https://www.npa.go.jp/publications/statistics/cybersecurity/index.htmle0587ae79c14aeb9Thu, 10 Sep 2026 00:00:00 +0000National Police Agency reported 123 ransomware cases in the first half of 2026, the highest half-year total since 2020.https://pwnsy.com/tools/cyber-watch/japan/#allb310fcd790b6cb97Sat, 11 Jul 2026 00:00:00 +0000Japan's largest taxi operator said its internal systems suffered unauthorized external access through a malware infection, taking dispatch and booking systems offline. The AiLock group claimed the attack and threatened to leak stolen data. Sources: https://www.bleepingcomputer.com/news/security/japans-largest-taxi-operator-shuts-systems-after-cyberattack/https://pwnsy.com/tools/cyber-watch/japan/#all5016ff6bd8072deeWed, 17 Jun 2026 00:00:00 +0000KDDI said attackers used a zero-day in third-party software to breach an email platform serving five ISPs, exposing 12,233,087 email addresses and 7,616,173 passwords. Sources: https://www.bleepingcomputer.com/news/security/japanese-telecom-giant-kddi-says-data-breach-affects-12-million-people/