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Organizations involved in this incident2026-09-29TOPPAN: Sompo Japan policyholder data sent to another insurerOpen the incident

2 results

CompanyFinance and insuranceTokyo, Shinjuku[Through a supplier][Critical]
Sompo Japan Insurance Inc.
Incidents 6Latest 2026-10-05Employees 20,116
CompanyManufacturingTokyo, Taito[Breached][Critical]
TOPPAN Inc.
Incidents 1Latest 2026-09-29Employees 10,331

	Role
Sompo Japan Insurance Inc.	[Through a supplier]	[Critical]	Company	Finance and insurance	Tokyo, Shinjuku	20,116	–	6	2026-10-05
TOPPAN Inc.	[Breached]	[Critical]	Company	Manufacturing	Tokyo, Taito	10,331	–	1	2026-09-29