オカムラData breach / unauthorized access incident
- Occurred on
- October 21, 2026
- Announced on
- October 23, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- Unknown
- Main impact
- It was reported that an unauthorized access to the provider system of the email delivery service "ブラストメール" used by スマートロジテック事業 may have affected the recipient lists the company had registered; names, email addresses, phone numbers, company locations and similar information may have been taken externally.
- Information involved
- Email addressPhone numberFull nameHome address
- Cause / key point
- Data from the database may have been exfiltrated due to unauthorized access by an external third party to the email delivery service provider's system.About Supply chain attacks (via vendors & shared services)
- Industry
- Manufacturing
- Listing / capital
- Listed company
- Sources
- Last updated
- October 24, 2026
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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: Supply chain attacks (via vendors & shared services)(Compromising the provider instead of the user)
Read the Supply chain attacks (via vendors & shared services) guide and national trends →