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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
Koganei City: Arcadia SpeeCAN RAIDEN intrusion may have exposed safety-mail and related registrant data小金井市InvestigatingUnknown2026-10-13
Shioya Town: Arcadia SpeeCAN RAIDEN intrusion may have exposed disaster-mail registrant data塩谷町InvestigatingUnknown2026-10-13
Miyazaki City: Arcadia intrusion may have exposed disaster-mail registrant data宮崎市InvestigatingUnknown2026-10-13
Ikaruga Town: Arcadia SpeeCAN RAIDEN intrusion may have exposed disaster-mail registrant data斑鳩町InvestigatingUnknown2026-10-13
Koga City (Ibaraki): Arcadia intrusion may have exposed disaster/crime-prevention mail registrant data古河市InvestigatingUnknown2026-10-13
Izumi City (Osaka): Arcadia SpeeCAN RAIDEN intrusion may have exposed Izumi Mail registrant data和泉市InvestigatingUnknown2026-10-13
Kakogawa City: staff-mail vendor intrusion may have exposed about 2,200 staff records加古川市InvestigatingUnknown2026-10-13
Miyazaki Pref.: Arcadia intrusion may have exposed 38,959 disaster/crime-mail registrations宮崎県Investigating38,959 Records2026-10-13
Sasebo City: Arcadia SpeeCAN RAIDEN intrusion may have exposed mail-delivery emails佐世保市InvestigatingUnknown2026-10-13
Yokosuka City: Arcadia intrusion may have exposed disaster/crime-mail registrant data横須賀市InvestigatingUnknown2026-10-13
Tanagura Town: Arcadia intrusion may have exposed registration-mail emails棚倉町InvestigatingUnknown2026-10-13
Kinokawa City: Arcadia SpeeCAN RAIDEN intrusion may have exposed mail-delivery registrant data紀の川市InvestigatingUnknown2026-10-13
Minamiboso City: Arcadia intrusion may have exposed data on 11,618 safety-mail registrants南房総市Investigating11,618 People2026-10-13
Satsuma Town: Arcadia intrusion may have exposed safety-mail registrant dataさつま町InvestigatingUnknown2026-10-13
Karatsu City: Arcadia intrusion may have exposed information-mail registrant data唐津市InvestigatingUnknown2026-10-13
Shibecha Town: Arcadia SpeeCAN RAIDEN intrusion may have exposed Milmail registrant data標茶町InvestigatingUnknown2026-10-13
Nagasaki City: Arcadia SpeeCAN RAIDEN intrusion may have exposed disaster-mail emails長崎市InvestigatingUnknown2026-10-13
Hikone City: Arcadia SpeeCAN RAIDEN intrusion may have exposed mail/emergency registrant data彦根市InvestigatingUnknown2026-10-13
Kagawa Pref.: Arcadia intrusion may have exposed disaster-mail and staff-system registrant data香川県InvestigatingUnknown2026-10-13
Kawajima Town: Arcadia intrusion may have exposed about 7,671 mail-delivery registrations川島町InvestigatingUnknown2026-10-13