> JapanHacked_Cybersecurity incidents in Japan

Company

Nisshin Fire & Marine Insurance Co., Ltd.

Nisshin Fire & Marine Insurance Co., Ltd. (Chiyoda, Tokyo; Finance and insurance) appears in 1 related cybersecurity incident. The latest was disclosed on 2024-10-07.

Profile

Industry/type: Finance and insurance
Location: Tokyo, Chiyoda
Website: https://www.nisshinfire.co.jp/

Public figures

Employees2,2232025-09-16
METI: Gビズインフォ

Metric	Value		As of	Source
Employees	2,223		2025-09-16	METI: Gビズインフォ

Incident history

Disclosed 2024-10-07Updated 2026-10-23Tokyo[Contained][Severity: Critical][Through a supplier][Major]
Tokyo Sonpo Kantei: ransomware puts customer data of several insurers at risk
[Ransomware][Credential abuse][Data leak][Extortion]Leaked 120KOrganizations 6

		Incident	Role	Impact level				Methods	Impacts		Status
2024-10-07	2026-10-23	Tokyo Sonpo Kantei: ransomware puts customer data of several insurers at risk	[Through a supplier]	[Major]	[Critical]	6 Mitsui Sumitomo Insurance Company, Limited, Tokyo Sonpo Kantei Inc., AIG General Insurance Company, Ltd., Sompo Japan Insurance Inc., Tokio Marine & Nichido Fire Insurance Co., Ltd., Nisshin Fire & Marine Insurance Co., Ltd.	Tokyo	[Ransomware][Credential abuse]	[Data leak][Extortion]	120,000	[Contained]