SignalAtlas
Share a reportManage my posts

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
Ichikawa City: Arcadia intrusion may have exposed data on 171 phone/FAX mass-notification registrants市川市Investigating171 People2026-10-14
Tsushima City: Arcadia RAIDEN intrusion may have exposed Bosai Hotto Mail and staff registrant data津島市InvestigatingUnknown2026-10-14
Chiba City: Arcadia SpeeCAN RAIDEN intrusion may have exposed safety-mail and related registrant data千葉市InvestigatingUnknown2026-10-14
Tamano City: Arcadia intrusion may have exposed 5,001 disaster-mail magazine registrations玉野市Investigating5,001 Records2026-10-14
Fukuoka City: vendor intrusion may have exposed data on 1,038 evacuation-notification registrants福岡市Investigating1,038 People2026-10-14
Nara City: Arcadia intrusion may have exposed disaster-info mail registered emails奈良市InvestigatingUnknown2026-10-14
Tsurugi Town: Arcadia intrusion may have exposed information-mail registrant dataつるぎ町InvestigatingUnknown2026-10-14
Toyokawa City: Arcadia-hosted Toyokawa Anshin Mail may have exposed 36,328 registrations豊川市Investigating36,328 Records2026-10-14
Otaru City: Arcadia intrusion may have exposed registration-mail, staff-assembly and NET119 registrant data小樽市InvestigatingUnknown2026-10-14
Hatsukaichi City: Arcadia SpeeCAN RAIDEN intrusion may have exposed safety-mail registrant data廿日市市InvestigatingUnknown2026-10-14
Sakai City: Arcadia intrusion may have exposed evacuation mass-delivery and staff-call registrant data堺市InvestigatingUnknown2026-10-14
Takasago City: vendor intrusion may have exposed elderly-watch network cooperators and related data高砂市InvestigatingUnknown2026-10-14
Aioi City: Arcadia SpeeCAN RAIDEN intrusion may have exposed disaster mass-notification registrant data相生市InvestigatingUnknown2026-10-14
Tokyo Chuo Ward: Arcadia intrusion may have exposed safety-mail and staff-mail registrant data中央区InvestigatingUnknown2026-10-14
Shunan City: Arcadia RAIDEN intrusion may have exposed Shunan Mail and staff-assembly registrant data周南市InvestigatingUnknown2026-10-14
Suginami: Arcadia SpeeCAN RAIDEN intrusion may have exposed facility emergency-mail registrant data杉並区InvestigatingUnknown2026-10-14
Kashiwa City: Arcadia intrusion may have exposed Kashiwa mail registrant data柏市InvestigatingUnknown2026-10-14
Inami Town (Wakayama): Arcadia SpeeCAN RAIDEN intrusion may have exposed admin/disaster-mail registrant data印南町InvestigatingUnknown2026-10-14
Aomori Pref.: Arcadia SpeeCAN RAIDEN intrusion may have exposed about 700 disaster-notification registrations青森県InvestigatingUnknown2026-10-14
Chitose City: Arcadia intrusion may have exposed NET119 and fire-call registrant data千歳市InvestigatingUnknown2026-10-14