Company
Yellow Hat Ltd.
Yellow Hat Ltd. (Ota, Tokyo; Wholesale and retail trade) appears in 2 related cybersecurity incidents. The latest was disclosed on 2026-08-28.
Profile
- Industry/type
- Wholesale and retail trade
- Location
- Tokyo, Ota
- Services
- Brands
- 2Rinkan
- Listing
- TSE Prime 9882
- Website
- https://www.yellowhat.jp/
Public figures
Employees137Non-consolidated2026-03-31
METI: GビズインフォRevenue¥104.5BNon-consolidated2026-03-31
METI: GビズインフォCapital¥15.1BNon-consolidated2026-03-31
METI: GビズインフォStores936Consolidated2026-03-31
Yellow Hat: 2026年３月期 決算短信〔日本基準〕(連結)
Incident history
Disclosed 2026-08-28Updated 2026-10-23Tokyo[Contained][Severity: Critical][Breached][Critical]
Yellow Hat: unauthorized access to the online service booking system[Web app exploit][Data leak][Service outage]Leaked 1.8MOrganizations 1Disclosed 2026-04-23Updated 2026-10-23Tokyo[Contained][Severity: Critical][Breached][Critical]
Yellow Hat: member data taken through the 2Rinkan app API[API abuse][Data leak][Service outage]Leaked 3.5MOrganizations 1