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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.
Disclosed around Oct 13, 2026. SpeeCAN RAIDEN (Arcadia) intrusion (detected Oct 11) may have exposed personal data. Notice states town delivery continued. No headcount.
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.
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.
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.
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.
Disclosed Oct 13, 2026. Staff-mail delivery vendor intrusion may have exposed about 2,200 staff name/email records.
Disclosed Oct 13, 2026. Arcadia-operated disaster/crime-info mail (via NEC Networks & System Integration) may have exposed 38,959 registrant emails etc.
Disclosed Oct 13, 2026 (page updated Nov 9). Arcadia SpeeCAN RAIDEN intrusion may have exposed registered emails. No headcount.
Disclosed Oct 13, 2026. SpeeCAN RAIDEN-backed services may have exposed: disaster mail (47,065 emails), disaster FAX (996 name/phone/FAX/email), disaster phone (11 name/phone/FAX), Yokosuka crime-mail (10,848 emails). Final counts under investigation; subsets not summed.
Delivery of registration mail stopped from 11:00 Oct 13, 2026. Arcadia operator intrusion may have exposed registered emails. No headcount.
Disclosed Oct 13, 2026. SpeeCAN RAIDEN (Arcadia) intrusion may have exposed personal data for city/disaster mail delivery. No headcount. Delivery resumed after safety confirmation.
Disclosed Oct 13, 2026. Arcadia system intrusion may have exposed name and email for 11,618 Minamiboso safety-mail registrants.
Disclosed Oct 13, 2026. Vendor Arcadia reported possible exposure of safety-mail registrant personal data after third-party intrusion. Details/headcount not yet fixed.
Possible data leak: Disclosed Oct 13, 2026 (restart page updated Oct 19). After Arcadia information-mail vendor intrusion, new sign-ups paused then resumed Oct 19 17:00. Notice warns registrants about suspicious mail following the leak risk. No headcount.
Disclosed Oct 13, 2026. SpeeCAN RAIDEN (Arcadia) intrusion may have exposed resident emails; fire-corps name/email/phone; and town-staff name/email. Delivery resumed Oct 19. No headcount.
Disclosed Oct 13, 2026. Arcadia SpeeCAN RAIDEN intrusion may have exposed disaster-mail registered emails. Headcount/scope not yet fixed; investigation ongoing.
First notice Oct 13, 2026. Arcadia SpeeCAN RAIDEN intrusion may have exposed Hikone mail-delivery / emergency-call registrant personal data (emails etc.). About 26,000 records.
Disclosed Oct 13, 2026. About 25,566 disaster-mail emails and about 8,593 staff-assembly system records may have leaked. Subsets not summed.
Disclosed Oct 13, 2026. About 7,671 town mail-delivery registrations may have leaked via Arcadia.