アフラック生命保険Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- June 30, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- 4,400,000 people
- Main impact
- Approximately 約440万人分 (initially disclosed as 約438万人, corrected on 7月13日) of names, addresses, phone numbers, policy numbers, and coverage details were leaked due to unauthorized access to a subscriber website; of these, about 約22万人分 also included bank account information for premium transfers.
- Information involved
- User / member IDCard & payment dataPhone numberHome addressFull nameDate of birth
- Cause / key point
- Unauthorized access believed to be a ransomware-type cyberattack (discovered after detection of high CPU load).About Ransomware
- Industry
- Finance & insurance
- Listing / capital
- Unlisted
The Japanese subsidiary of 米国Aflac Incorporated（NYSE: AFL）.
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:
Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction
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Same industry
- SCSアカウンティング株式会社2026.05.15 announced・Affected Unknown
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Attack method classification: Ransomware(Encrypting data and demanding a ransom)
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