> JapanHacked_
[Contained][Severity: Critical][Credential abuse]

Hosokawa Micron: unauthorized cloud storage login

After detecting suspicious activity on February 2 and disclosing it the next day, Hosokawa Micron traced the breach to one auxiliary cloud-storage account accessed with leaked or guessed credentials. Leaked records comprised 257 customer/business contacts, 1,470 employees or retirees and one employee family member. The family record included a My Number identifier. Operations did not stop.

Disclosed

2026-02-03

Organizations involved

1

Leaked or at risk

1.5K

1,470

Downtime

Unknown

Timeline

  1. Detected 2026-02-02
  2. Disclosed 2026-02-03
  3. 1 days

Organizations involved

Open in organization search

Sources

  1. [1][Official]当社がサイバー攻撃を受けた可能性のある事象について(最終報)Hosokawa Micron Corporation · 2026-03-27