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Japan: Data Breach Incidents by Country / region

Search incidents by company, country, industry, year and attack method. Review affected data, impact, verification status, company responses and sources.

Country / region: JapanReset
767 results
CardsTable
Title / subjectOrganizationsVerificationReported impactDisclosed
Ambition DX Holdings: business documents stolen in ransomware attack; about 580,000 personal records possibly exposedアンビションDXホールディングスConfirmedUnknown2026-08-06
Le Ange: intrusion into work chat tool BAND may have exposed member and staff personal dataル・アンジェInvestigatingUnknown2026-08-06
NICE: mailbox intrusion may have leaked about 2,400 personal-data recordsナイスInvestigatingUnknown2026-08-06
Akita NCT: faculty external HDD loss left data on 699 students and others unaccounted for秋田高専Confirmed699 People2026-08-05
Kyodo News: account misuse may have exposed staff and member-company contacts共同通信社InvestigatingUnknown2026-08-05
Tokai University: Yamanakako seminar-house booking site compromise may have leaked 274 users’ data東海大学Investigating274 People2026-08-05
Wadomari Town: inadequate redaction of a bullying investigation report may have leaked personal data和泊町InvestigatingUnknown2026-08-04
Kyoto Prefecture: KYOiku TV favorites flaw may have exposed member names on the open web京都府InvestigatingUnknown2026-08-04
Possible leak of Chubu Electric corporate email and contact information中部電力株式会社InvestigatingUnknown2026-08-04
Innovation: leaked GitHub credentials from a dev config exposed data on 62,689 customersイノベーションConfirmed62,689 People2026-08-04
Toshiba Tec ShopCraft: admin credentials in a procedure doc exposed 382,123 other merchants’ customers東芝テックConfirmed382,123 People2026-08-03
Kaigetsukan: intrusion may have leaked guest names and contact details海月館InvestigatingUnknown2026-08-03
Miyamoto Munashi: takeout-site intrusion may have leaked orderer personal dataM&SフードサービスInvestigatingUnknown2026-08-03
Fukuoka Prefecture: Kitakyushu HS trial-enrollment site exposed 293 other applicants’ data福岡県Confirmed293 People2026-08-03
Kodansha: phishing-led mailbox takeover may have stolen up to 3,812 contacts講談社InvestigatingUnknown2026-08-03
Fukuoka Prefecture: Chikugo agriculture office mis-emailed file on 300 new-farmer applicants福岡県Confirmed300 People2026-08-03
Estore ShopServe: data of about 23.36 million buyers and members leaked via vulnerabilityEストアーConfirmedUnknown2026-08-01
EPARK Relax & Esthe PeakManager: about 22.18 million salon customer records leakedEPARKリラク＆エステConfirmedUnknown2026-07-31
Central Consultant: corporate-site intrusion may have left inquiry/recruitment data viewableセントラルコンサルタントInvestigatingUnknown2026-07-31
Possible leak affecting 44,399 Sakura Mobile Travel Plan customers株式会社OgInvestigating44,399 People2026-07-31