JEMS

1MinorPossibleAnnounced

A staff email account was used from overseas without permission and sent 223 phishing emails to outside parties. Credentials may have been stolen.

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
Email account compromise
Operational impact
None

Data involved

DataStatusCountGroupEvidence
CredentialsPossible 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

  • Change your password
  • Change the password on other services where you reused it

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. 【お知らせ】当社メールアカウントへの不正アクセスおよびフィッシングメール送信についてwww.j-ems.jp · Published 2026-03-26(opens in a new tab)