Incidents in Sep 2026

Publication date: Dates are source publication dates (JST), not occurrence dates.

Published incidents: 45AI development: 0Data leaks & unauthorized access: 45
Incidents in Sep 2026 — Publication date
SunMonTueWedThuFriSat
3 casesMitsui Fudosan Co., Ltd.Chiba Prefecture "Inochi no Nigiwai Chosadan" (Biodiversity Center website)1 caseSeibu Railway "Seibu Tabisuru Resutoran 52-seki no Shifuku"
1 caseEast Nippon Expressway Company Limited (Tokyo Gaikan Project website)
1 caseInstitute of Science Tokyo1 caseKyoto Purple Sanga (Kyoto Sanga F.C.)2 casesApplyNow "Interview Cloud" "ApplyNow" "ApplyNow Sign"Enshu Yumesaki Agricultural Cooperative (JA Enshu Yumesaki)2 casesFuso DentsuREVISIO Inc.5 casesDigital Agency "Government Solution Service (GSS)"mogily digital ticket system
3 casesHarada Sangyo Co., Ltd. "Beer no Engawa"Nihon University3 casesAinokaze Toyama Railway "Ichiman Sanzenjaku Monogatari"Rohto Pharmaceutical2 casesHelpfeel 'Gyazo'Daiko Printing "PhotoGoods"
1 caseNichirei Corporation
1 caseDriveWealth4 casesTimes Mobility 'Times Car'Fines Inc.2 casesNippon Rent-A-Car Service "Nippon Rent-A-Car App"Enoguya Sankichi
2 casesStarts Publishing "OZmall"Tokyo Metro "Metro Point Club"2 casesShueisha Inc. (HAPPY PLUS COMMUNITY)Shinano Mainichi Shimbun "Shinano Mainichi Shimbun Digital"5 casesSeicomart "Seicomart App"TOPPAN (policyholder data of Sompo Japan)4 casesG-PLAN INC. (G Point)Benefit One Inc.

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Monthly archive

Incidents in Sep 2026