中日サービス（問い合わせフォーム）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 22, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- 112 records
- Main impact
- It was revealed that the website operated by 中日サービス (a subsidiary of 中日新聞北陸本社) experienced unauthorized access to the cloud service hosting the site, potentially exposing 112 records of customer information submitted via the inquiry form (individual and corporate names, addresses, phone numbers, email addresses, etc.). No website defacement was confirmed, affected customers have already been contacted and apologized to, and the company representative apologized saying, “We caused worry and inconvenience.”
- Information involved
- Full nameHome addressPhone numberEmail address
- Cause / key point
- Unauthorized access by a third party to the cloud service used by the website contractor.About Supply chain attacks (via vendors & shared services)
- Industry
- Services & other
- Listing / capital
- UnlistedRelated company (中日新聞北陸本社): 中日新聞社
- Last updated
- October 23, 2026
Where to go for this information
The steps themselves are on the protection guide. These links match the kinds of data in this incident, plus support contacts.
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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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 →