全日本空輸（ANA）Data breach / unauthorized access incident
- Occurred on
- August 10, 2023
- Announced on
- October 30, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- 37,800 people
- Main impact
- There is evidence that unauthorized access to flight reservation data allowed third parties to view personal information of 約3万7800人, and of those 約1700人 may also have had identity verification information such as passport numbers viewed.
- Information involved
- Full nameIdentity verification dataEmail addressPhone numberUser / member ID
- Cause / key point
- It was announced that reservation data were accessed due to unauthorized access to the Spain-based アマデウス社 cloud-based reservation system Altea.
- Industry
- Transport & travel
- Listing / capital
- Listed company
- Sources
- Last updated
- October 31, 2026
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Written & reviewed
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 →