> JapanHacked_Cybersecurity incidents in Japan

Nonprofit

IHI Group Health Insurance Society

IHI Group Health Insurance Society (Koto, Tokyo; Medical care and welfare) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-09-02.

Profile

Industry/type: Medical care and welfare
Location: Tokyo, Koto
Website: https://www.ihikenpo.or.jp/

Public figures

–

Metric	Value		As of	Source
–

Incident history

Disclosed 2026-09-02Updated 2026-10-22Tokyo[Contained][Severity: Critical][Through a supplier][Critical]
RIZAP: employee uploaded health guidance data to an outside generative AI service
[Insider][Data leak]Leaked 20KOrganizations 3

		Incident	Role	Impact level				Methods	Impacts		Status
2026-09-02	2026-10-22	RIZAP: employee uploaded health guidance data to an outside generative AI service	[Through a supplier]	[Critical]	[Critical]	3 RIZAP Co., Ltd., IHI Group Health Insurance Society, National Civil Engineering and Construction Health Insurance Society	Tokyo	[Insider]	[Data leak]	19,996	[Contained]