> JapanHacked_
[Contained][Severity: Critical][Intrusion]

OTOTOY: unauthorized access to the OTOTOY music store

From about 22:00 on 18 October, the OTOTOY music store received threatening access to its systems; operator OTOTOY noticed it at about 14:00 on 19 October and stopped the service. After fixing its systems it reopened at about 22:00 on 20 October, and on 21 October said internal user IDs, emails and sign-up dates of up to about 480,000 members may have been viewed or taken. It found no sign that hashed passwords, purchase history or addresses were taken.

Disclosed

2026-10-21

Organizations involved

1

Leaked or at risk

480K

480,000

Downtime

Unknown

Timeline

  1. Started 2026-10-18
  2. Detected 2026-10-19
  3. Disclosed 2026-10-21
  4. 3 days

Attack or cause

Method
[Intrusion]
Impact
[Data leak][Service outage]
Entry point
Unknown

Data exposed or at risk

[E-mail address]

Services hit

Organizations involved

Open in organization search

Sources

  1. [1][Official]不正アクセスによるお客様情報漏洩の可能性に関するお知らせOTOTOY · 2026-10-21