アフラック（よりそうネット）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 1, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- Unknown
- Main impact
- The policyholder website 「よりそうネット」 was subjected to unauthorized access by a third party, and some customers' personal information was confirmed to have been leaked. No fraudulent use has been confirmed at this time, but service outages and restrictions on certain procedures occurred.
- Information involved
- Home addressPhone numberFull name
- Cause / key point
- Information was leaked due to unauthorized access by a third party.
- Industry
- Finance & insurance
- Listing / capital
- Unlisted
The Japanese subsidiary of 米国Aflac Incorporated（NYSE: AFL）.
- Sources
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.
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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Attack method classification: Unauthorized access (method undisclosed)(Breached, but the technique was not identified or disclosed)
Read the Unauthorized access (method undisclosed) guide and national trends →