JihouCloud email

1MinorPossibleAnnounced

A cloud mail account was logged into without authorization and phishing mail was sent to its address book. Up to 890 addresses may have been exposed.

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
Sector
Media & publishing
Operational impact
None

Data involved

DataStatusCountGroupEvidence
Email addressPossible leakup to 890 records—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. 不正ログインによる個人情報漏えいに関するお詫びとご報告www.jiho.co.jp · Published 2026-02-26(opens in a new tab)