East Japan Railway Company
- Aliases / services
- JR東日本 / JR East / えきねっと / 大人の休日倶楽部 / East Japan Railway Company / 東日本旅客鉄道株式会社 / 东日本旅客铁道株式会社
- Official website
- https://www.jreast.co.jp/
Sources identifying the operating company
Each response applies only to its stated service scope. “Not listed” does not mean unpatched or unaffected.
Response status by service
Ekinet and Otona no Kyujitsu Club member mail
- Response status
- Not listed
- Response information checked
- 2026-10-29
Current re-audit: Related incident verified; PHP connection not stated · Research date: 2026-10-29
After a 9 October 2026 warning about possible exposure through an external mail service, the 15 October update records the provider’s conclusion that no member personal information had leaked. The initial possibility must not be presented as a confirmed breach.
Scope: A PHP connection and response to the current PHP vulnerabilities are not listed.
What users should do
Read the 15 October correction alongside the initial notice. That update contains no additional instruction to change user passwords.
Official service URL
Source URLs
- Official operator informationhttps://www.jreast.co.jp/press/2026/20261009_ho02.pdfService and operation documentation
Related official sources
- Official operator informationOfficial information directoryOfficial evidence identifying East Japan Railway Company and the relevant business.
- External mail-service findings (updated 15 October 2026)Official notice; link to this PHP incident unconfirmedAfter a 9 October 2026 warning about possible exposure through an external mail service, the 15 October update records the provider’s conclusion that no member personal information had leaked.
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