JR CentralJR Central MARKET / Iimono Tanbo

1MinorPossibleAnnounced Updated

The contractor reported that no leak was confirmed for about 15,000 mailing records. The announcement did not rule out the possibility.

This incident was imported from a dataset that compiles public announcements, and we are still checking it against the sources. Counts and causes will be updated after the check. Sources are in Japanese.

Cause
Via a vendor or service
Sector
Transport & logistics
Operational impact
None

Data involved

DataStatusCountGroupEvidence
Email addressPossible leakNot disclosed—Source(opens in a new tab)
NamePossible leakNot disclosed—Source(opens in a new tab)
Postal addressPossible leakNot disclosed—Source(opens in a new tab)
Phone numberPossible leakNot disclosed—Source(opens in a new tab)

Counts are the figures the organization announced. Because the same person may be counted more than once, we do not add the rows together.

What users should do

  • Watch for emails and texts pretending to be the company

General steps based on the type of data involved. Check the organization’s notice or help line to see whether you are affected.

Sources

  1. 株式会社IDCフロンティアで発生した不正アクセスに伴うメールアドレス等漏えいの可能性についてmarket.jr-central.co.jp · Published 2026-10-13(opens in a new tab)
  2. 株式会社IDCフロンティアで発生した不正アクセスに伴うメールアドレス等漏えいの可能性に関する続報market.jr-central.co.jp · Published 2026-10-15(opens in a new tab)