ヤクルト本社Data breach / unauthorized access incident
- Occurred on
- October 26, 2026
- Announced on
- November 4, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- 39,505 records
- Main impact
- Personal data of 3万9505件 were leaked due to unauthorized access to the website; this may include names, addresses, and telephone numbers of inquiry consumers, members, press contacts, and cosmetic applicants.
- Information involved
- Full nameHome addressPhone numberEmail address
- Cause / key point
- Data leakage due to unauthorized access to the website.
- Industry
- Food & dining
- Listing / capital
- Listed companyTSE Prime 2267
- Sources
- Last updated
- November 5, 2026
Stock price reaction to the disclosureヤクルト本社 / 東証プライム 2267
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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 →