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Disclosed Oct 14, 2026. Arcadia intrusion into staff-assembly systems may have exposed prefecture-registered staff data. No resident data registered. About-style subsets → blank.
Disclosed Oct 15, 2026 (vendor notice Oct 13). SpeeCAN RAIDEN (Arcadia) intrusion may have exposed FAX numbers or emails. No headcount.
Disclosed Oct 14, 2026 (PDF body read). SpeeCAN RAIDEN (Arcadia) intrusion may have exposed a gross 4,957 records across staff/disaster/infant-checkup/vaccination and other mail services (email/phone/FAX/name/DOB etc.). “Gross/延べ” → blank.
Disclosed Oct 14, 2026. SpeeCAN RAIDEN (Arcadia) emergency-notification intrusion may have exposed personal data. Ono safety mail and Hyogo Bosai Net are out of scope. No headcount.
Disclosed Oct 14, 2026 (PDF body read). SpeeCAN RAIDEN (Arcadia) intrusion may have exposed personal data. New sign-ups stopped. No headcount.
Disclosed Oct 14, 2026 (updated Oct 15). Arcadia-operated Kizugawa disaster-info mail may have exposed name/email/phone/FAX. No headcount.
Press release Oct 14, 2026. Tanpopo Mail (SpeeCAN RAIDEN) emergency-stopped; personal data may have leaked. No headcount.
Disclosed Oct 14, 2026 after Oct 7 Commune report. Up to 4,103 people (members and community staff) may have had member ID, account name, email, sex, prefecture, purchase/usage history and survey/preference data viewed/taken. No cards. No Mazda system impact.
Press release Oct 14, 2026 18:00 (page updated Oct 15). Arcadia-provided Net119 intrusion may have exposed data on 557 registrants (as of Oct 14).
Disclosed Oct 14, 2026. Arcadia intrusion may have exposed Hiro-mail (email/some names), staff-assembly (name/unit/email/some phones), elderly-call (name/phone), and 119RAIDEN fire-corps mail (name/email/unit). No headcount.
Disclosed Oct 14, 2026. 119 RAIDEN (Arcadia) intrusion may have exposed published total 493 records: 90 fire staff / 387 fire corps / 16 gas-company (name/email; 15 also phone).
Disclosed Oct 14, 2026 (resume note Oct 15). Disaster-mail registered emails may have leaked. No headcount.
Disclosed Oct 14, 2026. Arcadia intrusion may have exposed about 930 119RAIDEN fire-staff/corps records (name/email/unit) and about 30 NET119 records (name/DOB/sex/address/phone/email/FAX etc.). “About” → blank; subsets not summed.
Disclosed Oct 14, 2026 (page updated Oct 15). No confirmed impact/leak for Hiroshima disaster-mail citizen data; staff-assembly system may have exposed staff name/email etc. No headcount.
Disclosed Oct 14, 2026 (page updated Oct 21). Arcadia-operated mail for disaster-safety / missing-persons / vulnerable / after-school / nursery services may have exposed name and email. No headcount.
Disclosed Oct 14, 2026. SpeeCAN RAIDEN (Arcadia) used for ward heads / welfare commissioners / fire corps / city staff may have exposed personal data. No headcount.
Disclosed Oct 14, 2026. SpeeCAN RAIDEN disaster flash-mail intrusion may have exposed emails etc. No headcount.
Disclosed Oct 13, 2026. Kitashiobara disaster-radio mail runs on Arcadia SpeeCAN RAIDEN. Third-party intrusion may have exposed personal data; emergency stop from 11:00 Oct 13. No headcount.
Disclosed Oct 13, 2026 (restart-notice page). 3,024 registrants at the time of intrusion confirmation; personal data may have leaked and delivery was emergency-stopped.
Third notice page restates first-notice facts: SpeeCAN RAIDEN (Arcadia) intrusion may have exposed registered personal data. Service resumed after safety confirmation. No headcount. Lead first-public date Oct 13, 2026.