東邦HD（エンタッチ）Data breach / unauthorized access incident
- Occurred on
- October 13, 2026
- Announced on
- October 19, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- Unknown
- Main impact
- There was unauthorized access to the database of an MR support service that uses the web conferencing system provided by エンタッチ, a non-consolidated subsidiary of 東邦ホールディングス; names, affiliated medical institutions, prefectures of healthcare professionals, and possibly MR names and email addresses were disclosed. They report no confirmed disruption to business continuity or data alteration/deletion, and say files or recorded audio/video used by MRs are excluded; the number of affected records is under investigation.
- Information involved
- Email addressPhone numberFull nameHome address
- Cause / key point
- Unauthorized access by a third party (reported as a ransomware attack).
- Industry
- Healthcare
- Listing / capital
- Listed companyParent company (listed holding company): 東邦ホールディングス(8129)
エンタッチ is reported to be a subsidiary of 東邦ホールディングス.
- Last updated
- October 21, 2026
Stock price reaction to the disclosure東邦HD（エンタッチ）
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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)
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