タカラトミー（デュエマサポートアプリ）Data breach / unauthorized access incident
- Occurred on
- August 1, 2025
- Announced on
- July 28, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- 155,000 people
- Main impact
- Up to 15.5万人 worth of addresses, dates of birth, contact details, and social media identifiers were viewable linked together, but actual exfiltration has not been confirmed.
- Information involved
- User / member IDHome addressDate of birth
- Cause / key point
- A design and implementation vulnerability in the user authentication function.About Exploitation of vulnerabilities
- Industry
- IT & telecom
- Listing / capital
- Listed company東証プライム 7867(タカラトミー)
- Last updated
- October 20, 2026
Stock price reaction to the disclosureタカラトミー / 東証プライム 7867
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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: Exploitation of vulnerabilities(Breaking in through holes in software and devices)
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