焼肉きんぐData breach / unauthorized access incident
- Occurred on
- October 2, 2026
- Announced on
- October 5, 2026
- Severity
- SSLarge-scale compromise of sensitive data such as payment or identity-verification records affecting millions.
- Scale
- 10,788,963 records
- Main impact
- Due to unauthorized access to the membership management system, 10,788,963 members' records were exfiltrated. Leaked data includes membership number, name, email address, and phone number, while login passwords, dates of birth, and payment information are reported not to have been leaked.
- Information involved
- Email addressUser / member IDPhone numberFull name
- Cause / key point
- Information exfiltration resulting from unauthorized access to the membership management system.
- Industry
- Food & dining
- Listing / capital
- Listed company東証プライム 3097(物語コーポレーション)
「焼肉きんぐ」 is a brand of 物語コーポレーション.
- Last updated
- October 20, 2026
Stock price reaction to the disclosure物語コーポレーション / 東証プライム 3097
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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 →