日経BPData breach / unauthorized access incident
- Occurred on
- September 30, 2026
- Announced on
- October 4, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- 26 records
- Main impact
- Due to unauthorized access to an employee's email account, the personal names and email addresses of 26 correspondents may have been exposed. Affected recipients have been contacted individually.
- Information involved
- Email addressAuth tokenFull name
- Cause / key point
- Unauthorized access occurred after an employee's authentication credentials were obtained via a phishing email sent to a 日本経済新聞社 employee's email address.About Targeted email & phishing
- Industry
- Media & entertainment
- Listing / capital
- Unlisted
- Sources
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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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Incidents related to "フィッシングメール"
Incidents where the damage spread through the same service or system.
Same attack method
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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 →