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Bicycle Life Support

Bicycle Life Support (run by JCOM Co., Ltd.) was hit in 1 recorded cybersecurity incident. The latest was disclosed on 2026-11-02.

About the service

Website

https://www.jcom.co.jp/service/bicycle

Run by

JCOM Co., Ltd.

Category

Other

For

People

Incident history

Disclosed 2026-11-02Updated 2026-11-12Chiba, Gunma, Hokkaido, Osaka, Saitama, Tokyo[Investigating][Severity: Critical][Through a supplier][Major]
Prestige Core Solution: up to about 5.5 million records stolen, including three full card numbers
[Intrusion][Data leak][Service outage]Leaked 5.5MOrganizations 23

		Incident	Role	Impact level				Methods	Impacts		Status
2026-11-02	2026-11-12	Prestige Core Solution: up to about 5.5 million records stolen, including three full card numbers	[Through a supplier]	[Major]	[Critical]	23 National Mutual Insurance Federation of Agricultural Cooperatives, Nissan Financial Services Co., Ltd., Prestige Core Solution Inc., JCOM Co., Ltd., KDDI Corporation, Mitsui Sumitomo Insurance Company, Limited, Sompo Japan Insurance Inc., 2Rinkan Yellow Hat Co., Ltd., BMW Japan Corp., BMW Japan Finance Corp., cyma Yellow Hat Co., Ltd., ENEOS Corporation, JACCS Co., Ltd., Kohnan Shoji Co., Ltd., SBI Insurance Co., Ltd., Subaru Corporation, Subaru Finance Co., Ltd., Yamada Finance Service Inc., Zurich Insurance Company, AXA General Insurance Company, Limited, Porsche Financial Services Japan K.K., Porsche Japan K.K., Sony Assurance Inc.	Chiba, Gunma, Hokkaido, Osaka, Saitama, Tokyo	[Intrusion]	[Data leak][Service outage]	5,500,000	[Investigating]

Other incidents of the operator (2)

Disclosed 2026-06-23Updated 2026-07-06Aichi, Kagawa, Tokyo[Contained][Severity: Critical]
KDDI: unauthorized access to its mail system for ISPs
[Intrusion][Data leak]Leaked 12.2MOrganizations 7
Disclosed 2023-11-22Updated 2023-11-29 08:05Tokyo[Investigating][Severity: Critical]
J:COM: mesh Wi-Fi supplier partner's app log server breach
[Intrusion][Data leak]Leaked 231.9KOrganizations 1

		Incident				Methods	Impacts		Status
2026-06-23	2026-07-06	KDDI: unauthorized access to its mail system for ISPs	[Critical]	7 JCOM Co., Ltd., KDDI Corporation, BIGLOBE Inc., Chubu Telecommunications Co., Inc., KDDI Web Communications Inc., NIFTY Corporation, STNet, Incorporated	Aichi, Kagawa, Tokyo	[Intrusion]	[Data leak]	12,231,954	[Contained]
2023-11-22	2023-11-29 08:05	J:COM: mesh Wi-Fi supplier partner's app log server breach	[Critical]	1 JCOM Co., Ltd.	Tokyo	[Intrusion]	[Data leak]	231,941	[Investigating]