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
- Detected 2026-11-06
- Disclosed 2026-11-09
- 3 days
Attack or cause
- Method
- [Intrusion]
- Impact
- [Data leak]
- Entry point
- Unknown
Data exposed or at risk
Supply chain
- Organizations listed on this site
- 2
Services hit
Organizations involved
[Through a supplier][Major]Hokkaido, Sapporo, Kita-kuWholesale and retail trade
Nitori Co., Ltd.Nitori Net is among the affected services. The count is a group-wide ceiling, not a company-specific allocation.
[Breached][Major]Hokkaido, Sapporo, Kita-kuWholesale and retail trade37,620,000 leaked
Nitori Holdings Co., Ltd.
Sources
- [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