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Data breaches

Data breaches

Sources first · Counts reflect this database, not worldwide incident totals.

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1010 results
Title / subjectOrganizationsVerificationReported impactDisclosed
MediaNavi: about 110,000 customer email addresses and names leaked via Blastmail breachメディアナビConfirmedUnknown2026-10-30
Central Ohio Primary Care: vishing attack accessed PHI filesCentral Ohio Primary CareConfirmedUnknown2026-10-30
Matsuya Foods: member data leaked from app management system (2,377,127 delivery/order records)松屋フーズホールディングスConfirmed2,377,127 Records2026-10-30
Ryohin Keikaku: MUJI app customer data may have been leaked (up to about 27.26 million records)良品計画InvestigatingUnknown2026-10-30
Marathon Health: personal data obtained via employee accountMarathon HealthConfirmedUnknown2026-10-29
2rinkan reports 489,564 customers’ email addresses exposed through Blastmail株式会社２りんかんイエローハットConfirmed489,564 People2026-10-29
Belc: 786,739 email addresses leaked via Arara email-service breachベルクConfirmed786,739 Records2026-10-29
Arara Message data exfiltration; roughly 81 million email-address scope includes possible acquisitionアララ株式会社ConfirmedUnknown2026-10-29
Japan Post: international-mail My Page newsletter email addresses may have leaked via contractor breach日本郵便InvestigatingUnknown2026-10-29
Chugoku Electric: delivery-address data may have leaked via Sagawa Express parcel-inquiry breach中国電力InvestigatingUnknown2026-10-29
Clubnets: CN Points satellite-system intrusion; possible member-data leakクラブネッツInvestigatingUnknown2026-10-29
Santa Lolla discloses unauthorised access to ecommerce customer and order dataSanta LollaConfirmedUnknown2026-10-29
Asahi Shimbun: up to 70,921 event/contact records may have leaked via Cuenote FC breach朝日新聞社Investigating70,921 Records2026-10-29
Life Card: data of 339,610 contracts may have leaked via Cuenote FC breachライフカードInvestigating339,610 Records2026-10-28
Photon Health reports possible data acquisition via Metabase zero-dayPhoton HealthInvestigatingUnknown2026-10-28
Animate: 140,443 email addresses leaked via mail-delivery provider株式会社アニメイトConfirmed140,443 Records2026-10-28
Resona Bank: customer emails may have leaked via Cuenote FC breachりそな銀行InvestigatingUnknown2026-10-27
Saitama Resona Bank: customer emails may have leaked via Cuenote FC breach埼玉りそな銀行InvestigatingUnknown2026-10-27
Kansai Mirai Bank: customer emails may have leaked via Cuenote FC breach関西みらい銀行InvestigatingUnknown2026-10-27
Hitec Group USA: online-store customer data accessed via third-party appHitec Group USAConfirmedUnknown2026-10-27