リゾートトラスト（会員・ホテル予約者）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 9, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- 26,000 records
- Main impact
- Unauthorized access to the website; confirmed information leakage of group members 約2.6万件 and カハラホテル横浜 reservation holders 約3.6万件. Usage history, medical, payment information, emails, etc. are excluded.
- Information involved
- Email addressCard & payment dataHealth & medical data
- Cause / key point
- Cause under investigation.
- Industry
- Services & other
- Listing / capital
- Listed company東証プライム 4681(リゾートトラスト)
- Sources
- Last updated
- October 20, 2026
Stock price reaction to the disclosureリゾートトラスト / 東証プライム 4681
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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 →