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Organizations in Japan involved in cyberattacks and data leaks. Filter by location, industry or type, size and incident involved.
Organizations involved in this incident2026-11-08teket: member data leak confirmed; all electronic-ticket services suspendedOpen the incident
31 results
CompanyInformation and communicationsTokyo, Chuo[Breached][Critical]
teket Inc.Incidents 1Latest 2026-11-08
GovernmentPrefectureFukushima[Through a supplier][Major]
Fukushima PrefectureIncidents 3Latest 2026-11-08
GovernmentPrefectureKanagawa[Through a supplier][Major]
Kanagawa PrefectureIncidents 5Latest 2026-11-08
GovernmentMunicipalityTokyo, Hino[Through a supplier][Major]
Hino CityIncidents 3Latest 2026-11-08
GovernmentMunicipalityAichi, Ichinomiya[Through a supplier][Major]
Ichinomiya CityIncidents 3Latest 2026-11-08
GovernmentMunicipalityAichi, Okazaki[Through a supplier][Major]
Okazaki CityIncidents 5Latest 2026-11-08
GovernmentEducation and learning supportOsaka, Osaka, Chuo[Through a supplier][Major]
Administrative Agency for Osaka City MuseumsIncidents 1Latest 2026-11-08
EducationEducation and learning supportTokyo, Hachioji[Through a supplier][Major]
Chuo UniversityIncidents 2Latest 2026-11-08
CompanyScientific research, professional and technical servicesTokyo, Shibuya[Through a supplier][Major]
Dragon Inc.Incidents 1Latest 2026-11-08
NonprofitOther servicesYamanashi, Fujikawaguchiko[Through a supplier][Major]
Fujizakura Sports ClubIncidents 1Latest 2026-11-08
GovernmentMunicipalityTokyo, Hachioji[Through a supplier][Major]
Hachioji CityIncidents 1Latest 2026-11-08
NonprofitOther servicesTokyo, Shinjuku[Through a supplier][Major]
Hockey Japan LeagueIncidents 1Latest 2026-11-08
NonprofitOther servicesIshikawa, Kanazawa[Through a supplier][Major]
Ishikawa Prefectural Music and Culture Promotion CorporationIncidents 1Latest 2026-11-08
NonprofitOther servicesTokyo, Toshima[Through a supplier][Major]
Japan Amateur Radio LeagueIncidents 1Latest 2026-11-08
NonprofitOther servicesTokyo, Suginami[Through a supplier][Major]
Japan Philharmonic OrchestraIncidents 1Latest 2026-11-08
GovernmentMunicipalityTokyo, Kiyose[Through a supplier][Major]
Kiyose CityIncidents 1Latest 2026-11-08
EducationEducation and learning supportTokyo, Tachikawa[Through a supplier][Major]
Kunitachi College of MusicIncidents 1Latest 2026-11-08
NonprofitEducation and learning supportKyoto, Kyoto, Nakagyo[Through a supplier][Major]
Kyoto City Arts and Culture AssociationIncidents 1Latest 2026-11-08
CompanyOther servicesTokyo, Suginami[Through a supplier][Major]
Kyowa Sangyo Co., Ltd.Incidents 1Latest 2026-11-08
EducationEducation and learning supportTokyo, Nerima[Through a supplier][Major]
Musashino Ongaku GakuenIncidents 1Latest 2026-11-08
NonprofitOther servicesTokyo, Nerima[Through a supplier][Major]
Pacific Philharmonia TokyoIncidents 1Latest 2026-11-08
NonprofitEducation and learning supportHokkaido, Sapporo, Nishi[Through a supplier][Major]
Sapporo Lifelong Learning Promotion FoundationIncidents 1Latest 2026-11-08
CompanyConstructionTokyo, Bunkyo[Through a supplier][Major]
Tokyo Reiki Kogyo Co., Ltd.Incidents 1Latest 2026-11-08
NonprofitEducation and learning supportTokyo, Shibuya[Through a supplier][Major]
Tokyo Sports and Culture FoundationIncidents 1Latest 2026-11-08
CompanyPersonal services and entertainmentTokyo, Shibuya[Through a supplier][Major]
Tokyu Bunkamura Co., Ltd.Incidents 1Latest 2026-11-08
CompanyReal estate and rentalTokyo, Setagaya[Through a supplier][Major]
Tokyu Community Corp.Incidents 3Latest 2026-11-08
NonprofitEducation and learning supportIbaraki, Tsukuba[Through a supplier][Major]
Tsukuba Science Expo Memorial FoundationIncidents 1Latest 2026-11-08
CompanyPersonal services and entertainmentKanagawa, Yokohama, Naka[Through a supplier][Major]
Yokohama DeNA BayStars Baseball Club, Inc.Incidents 2Latest 2026-11-08Employees 370
NonprofitOther servicesKanagawa, Kawasaki, Kawasaki[Through a supplier][Moderate]
LF ConcertIncidents 1Latest 2026-11-08
NonprofitOther servicesAichi, Nagoya, Naka[Through a supplier][Moderate]
Nagoya Philharmonic OrchestraIncidents 1Latest 2026-11-08
NonprofitOther servicesTokyo, Chuo[Through a supplier][Moderate]
Tokyo SunbeamsIncidents 1Latest 2026-11-08