En investigación
Ayase City: Arcadia intrusion may have exposed data on 11,053 safety-mail registrants
First notice Oct 13, 2026. Arcadia-operated Ayase safety/security mail may have leaked personal data; 11,053 registered users. Service suspended.
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En investigación
Tomiya City: Arcadia SpeeCAN RAIDEN intrusion may have exposed safety-mail emails
Disclosed Oct 13, 2026. Arcadia SpeeCAN RAIDEN intrusion may have exposed Tomiya safety-mail registered emails. No headcount.
En investigación
Joetsu City: Arcadia SpeeCAN RAIDEN intrusion may have exposed safety-mail registrant data
Disclosed Oct 13, 2026 (page also notes Oct 30 update). SpeeCAN RAIDEN intrusion may have exposed resident emails; fire-corps name/email/phone/unit/rank; and staff name/email/staff-ID/affiliation. Headcount under investigation.
En investigación
Tokai City: Arcadia SpeeCAN RAIDEN intrusion may have exposed 1,210 disaster-notification records
Disclosed Oct 13, 2026. SpeeCAN RAIDEN intrusion may have exposed 1,210 registrations (1,000 city staff / 210 medical etc.). Published total 1,210 stored; breakdown in text.
En investigación
Oyabe City: SpeeCAN RAIDEN intrusion may have exposed disaster/emergency-mail registrant data
Disclosed Oct 13, 2026. Disaster/emergency-mail SpeeCAN RAIDEN intrusion may have exposed registered emails and optionally registered names. No headcount. Delivery still operating normally.
En investigación
Itoman City: Arcadia SpeeCAN RAIDEN intrusion may have exposed disaster-mail emails
Disclosed Oct 13, 2026. Arcadia reported SpeeCAN RAIDEN intrusion (Oct 11 16:30) and possible personal-data leak. Possible exposure: disaster-mail registered emails. Notice states city’s delivery was not in the emergency-stop set. No headcount.
En investigación
Arcadia: SpeeCAN RAIDEN intrusion may have exposed up to about 3.136M contact emails and other data
First notice Oct 13, 2026 (ongoing updates). Suspicious activity Oct 11 16:30; path blocked ~03:00 Oct 12. SpeeCAN RAIDEN contact name/email/phone/FAX, staff, contract data and message history may have leaked. Estimated maxima: ~3,136,000 emails, ~105,000 phones, ~15,000 faxes. No payment data. Subcount “about” estimates not summed. Many municipality/enterprise victim notices followed.
En investigación
Sabae City: Arcadia intrusion may have exposed emergency mass-mail registrant data
Disclosed Oct 13, 2026 (resume note Oct 16). Arcadia operator intrusion may have exposed personal data. Delivery stopped Oct 13 and resumed Oct 16. Leak confirmation/scope still under investigation. No headcount.
En investigación
Ikoma City: Arcadia intrusion may have exposed emergency/disaster-mail registrant data
Possible data leak: Disclosed Oct 13, 2026. About 3,000 resident emails, about 1,000 staff-assembly records and about 10 FAX records may all have leaked. Subsets not summed.
Confirmado
Tulare Joint Union HSD: files copied in intrusion
Unauthorised activity was identified August 28, 2026 and on August 30 files and folders were confirmed copied or downloaded.
Confirmado
Mybo Fellows: membership-system intrusion leaked data on 419 members
Parent DCM Holdings disclosed Oct 13, 2026. Anomalous access Sep 21 confirmed as intrusion Oct 8; app fully stopped Oct 9. 419 members: member number, email, status, stage, points etc. Name/address/phone/DOB/password/cards not included. Headcount still being refined.
En investigación
Koganei City: Arcadia SpeeCAN RAIDEN intrusion may have exposed safety-mail and related registrant data
Disclosed Oct 13, 2026 (page updated Oct 19). May have exposed Koganei safety-mail emails; emergency phone/FAX name and phone/FAX; fire-corps emergency contacts name/phone/email. No headcount.
En investigación
Shioya Town: Arcadia SpeeCAN RAIDEN intrusion may have exposed disaster-mail registrant data
Disclosed around Oct 13, 2026. SpeeCAN RAIDEN (Arcadia) intrusion (detected Oct 11) may have exposed personal data. Notice states town delivery continued. No headcount.
En investigación
Miyazaki City: Arcadia intrusion may have exposed disaster-mail registrant data
First notice Oct 13, 2026. Vendor Arcadia announced possible personal-data leak after third-party intrusion. Second notice Oct 14 stopped new sign-ups and warned about suspicious mail. No headcount.
En investigación
Ikaruga Town: Arcadia SpeeCAN RAIDEN intrusion may have exposed disaster-mail registrant data
Restart notice (Oct 15, 2026) restates that SpeeCAN RAIDEN third-party intrusion may have exposed personal data; investigation continuing. No headcount. Lead lists first public date as Oct 13, 2026.
En investigación
Koga City (Ibaraki): Arcadia intrusion may have exposed disaster/crime-prevention mail registrant data
Service stopped from 11:00 Oct 13, 2026 (page later updated Nov 5). Arcadia SpeeCAN RAIDEN intrusion may have exposed disaster/crime-prevention mail registrant personal data. No headcount.
En investigación
Izumi City (Osaka): Arcadia SpeeCAN RAIDEN intrusion may have exposed Izumi Mail registrant data
Page updated Oct 15, 2026. Arcadia SpeeCAN RAIDEN intrusion may have exposed Izumi Mail etc. registrant personal data. No headcount. Lead lists first public date as Oct 13, 2026.
En investigación
Kakogawa City: staff-mail vendor intrusion may have exposed about 2,200 staff records
Disclosed Oct 13, 2026. Staff-mail delivery vendor intrusion may have exposed about 2,200 staff name/email records.
En investigación
Miyazaki Pref.: Arcadia intrusion may have exposed 38,959 disaster/crime-mail registrations
Disclosed Oct 13, 2026. Arcadia-operated disaster/crime-info mail (via NEC Networks & System Integration) may have exposed 38,959 registrant emails etc.
En investigación
Sasebo City: Arcadia SpeeCAN RAIDEN intrusion may have exposed mail-delivery emails
Disclosed Oct 13, 2026 (page updated Nov 9). Arcadia SpeeCAN RAIDEN intrusion may have exposed registered emails. No headcount.