村田製作所Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- April 27, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- 73,000 records
- Main impact
- Unauthorized access to the internal information-sharing system resulted in confirmed or potential acquisition of approximately 73,000 employee-related records (including health, personnel, and account information) and contact details for approximately 15,000 external parties.
- Information involved
- Email addressCard & payment dataPhone numberHome addressFull nameDate of birthHealth & medical data
- Cause / key point
- Cause is under investigation.
- Industry
- Government & municipal
- Listing / capital
- Listed company東証プライム 6981(村田製作所)
- Last updated
- October 20, 2026
Stock price reaction to the disclosure村田製作所 / 東証プライム 6981
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CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
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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 →