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Organizations involved in this incident2025-05-01Gion: ransomware in its document management systemOpen the incident

2 results

CompanyFinance and insuranceTokyo, Shinjuku[Through a supplier][Major]
Sompo Japan Insurance Inc.
Incidents 6Latest 2026-10-05Employees 20,116
CompanyTransport and postal servicesKanagawa, Sagamihara, Chuo[Breached][Major]
Gion Co., Ltd.
Incidents 1Latest 2025-05-01Employees 2,850

	Role
Sompo Japan Insurance Inc.	[Through a supplier]	[Major]	Company	Finance and insurance	Tokyo, Shinjuku	20,116	–	6	2026-10-05
Gion Co., Ltd.	[Breached]	[Major]	Company	Transport and postal services	Kanagawa, Sagamihara, Chuo	2,850	–	1	2025-05-01