ビューカード（VIEW’s NET）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 9, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- 4,030,000 records
- Main impact
- Due to unauthorized access to an external email distribution service, up to approximately 4,030,000 VIEW’s NET members' email addresses may have been viewed or obtained. Names, addresses, phone numbers, and card numbers were not affected.
- Information involved
- Email address
- Cause / key point
- The external email distribution service provided by IDCフロンティア was affected following unauthorized access to IDCフロンティア.
- Industry
- Finance & insurance
- Listing / capital
- UnlistedParent company: 東日本旅客鉄道(東証プライム 9020)
ビューカード is a wholly owned subsidiary of JR東日本.
- Sources
- Last updated
- October 20, 2026
Stock price reaction to the disclosure東日本旅客鉄道・親会社 / 東証プライム 9020
Stock information is reference data based on Yahoo Finance and may be delayed. This site does not solicit or advise investment and does not guarantee the accuracy or completeness of this information. We accept no liability for any investment decision based on it.
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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: Unauthorized access (method undisclosed)(Breached, but the technique was not identified or disclosed)
Read the Unauthorized access (method undisclosed) guide and national trends →