東京計器株式会社Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- April 27, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- Unknown
- Main impact
- An employee's Chatwork account was misused via phishing; it was disabled after discovery, and a May 8 investigation found no confirmed external data leakage.
- Information involved
- User / member ID
- Cause / key point
- It has been reported that the account was misused through phishing.About Targeted email & phishing
- Industry
- Manufacturing
- Listing / capital
- Listed company東証プライム 7721(東京計器)
- Last updated
- October 20, 2026
Stock price reaction to the disclosure東京計器 / 東証プライム 7721
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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: Targeted email & phishing(Fake emails and sites that steal credentials)
Read the Targeted email & phishing guide and national trends →