オーミケンシ株式会社Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- March 23, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- Unknown
- Main impact
- Following an investigation into the March 16 system outage, it was disclosed that unauthorized access by a third party was confirmed, but the number of affected records is not stated.
- Information involved
- Not specified in the disclosure
- Cause / key point
- Unauthorized access by a third party was confirmed.
- Industry
- Manufacturing
- Listing / capital
- Listed company東証スタンダード 3111(オーミケンシ)
- Last updated
- October 20, 2026
Stock price reaction to the disclosureオーミケンシ / 東証スタンダード 3111
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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: Unauthorized access (method undisclosed)(Breached, but the technique was not identified or disclosed)
Read the Unauthorized access (method undisclosed) guide and national trends →