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

Nitori Holdings: intrusion may expose up to 37.62 million member and purchaser records

An intrusion may expose up to 37.62 million member and purchaser records, including contact and order data. Login passwords and card data are excluded.

Disclosed

2026-11-09

Organizations involved

2

Leaked or at risk

37.6M

37,620,000

Downtime

Unknown

Scope and count

Unauthorized access to managed systems was detected and blocked on 6 November. Logs suggest possible earlier access in mid-to-late October. The ceiling of 37,620,000 records covers individual members, purchasers, corporate members and order data from Nitori Net and official marketplace shops; it is not a confirmed count of people whose data was stolen and may change. [1]

Potentially exposed fields include member numbers, names/readings, email and postal addresses, phone numbers, birth dates, gender, corporate/contact details and order data, with fields varying by person. Login passwords and credit-card data are excluded. Investigation of the entry route, scope and secondary harm continues; remediation of weak points and stronger monitoring are complete. [1]

Timeline

  1. Detected 2026-11-06
  2. Disclosed 2026-11-09
  3. 3 days

Supply chain

Services hit

Organizations involved

Open in organization search

Sources

  1. [1][Official]当社システムへの不正アクセスによる 個人情報漏えいの可能性に関するお詫びとお知らせNitori Holdings · 2026-11-09