名鉄協商株式会社Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- September 3, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- Unknown
- Main impact
- They disclosed that customer information may have been leaked due to unauthorized access. After discovering the incident on June 23, investigations confirmed attacks on multiple servers and they reported that affected parties were notified sequentially.
- Information involved
- Not specified in the disclosure
- Cause / key point
- The cause is under investigation.
- Industry
- Transport & travel
- Listing / capital
- UnlistedParent company: 名古屋鉄道(東証プライム 9048)
名鉄協商 is a subsidiary of 名古屋鉄道.
- Last updated
- October 20, 2026
Stock price reaction to the disclosure名古屋鉄道・親会社 / 東証プライム 9048
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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 →