> JapanHacked_Cybersecurity incidents in Japan

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SOURCENEXT online shop

SOURCENEXT online shop (run by Sourcenext Corporation) was hit in 1 recorded cybersecurity incident. The latest was disclosed on 2023-02-14.

About the service

Website

https://www.sourcenext.com/

Run by

Sourcenext Corporation

Category

Shopping

For

People

Incident history

Disclosed 2023-02-14Updated 2023-02-15 08:05Tokyo[Resolved][Severity: Critical][Breached][Critical]
SOURCENEXT: the payment application of its online shop was tampered with and card data of 112,132 customers leaked
[Web app exploit][Data leak]Leaked 121KOrganizations 1

		Incident	Role	Impact level				Methods	Impacts		Status
2023-02-14	2023-02-15 08:05	SOURCENEXT: the payment application of its online shop was tampered with and card data of 112,132 customers leaked	[Breached]	[Critical]	[Critical]	1 Sourcenext Corporation	Tokyo	[Web app exploit]	[Data leak]	120,982	[Resolved]

Other incidents of the operator (2)

Disclosed 2026-10-19Updated 2026-10-28Aichi, Fukuoka, Kanagawa, Osaka, Saitama, Tokyo[Investigating][Severity: Critical]
Ymirlink: break-in at the Cuenote FC email delivery service exported about 51.6 million records from 49 customer systems
[Web app exploit][Data leak]Leaked 51.6MOrganizations 31
Disclosed 2026-10-15Updated 2026-10-16Tokyo[Contained][Severity: Critical]
Sourcenext: mass leak of member data
[API abuse][Data leak]Leaked 22.5MOrganizations 1

		Incident				Methods	Impacts		Status
2026-10-19	2026-10-28	Ymirlink: break-in at the Cuenote FC email delivery service exported about 51.6 million records from 49 customer systems	[Critical]	31 Central Japan Railway Company, Kyushu Railway Company, West Japan Railway Company, Bandai Namco Entertainment Inc., BANDAI SPIRITS Co., Ltd., Life Card Co., Ltd., Rise UP Co., Ltd., Ymirlink, Inc., Dai Nippon Printing Co., Ltd., DCM Co., Ltd., Nomura Securities Co., Ltd., Saitama Prefecture, istyle Inc., NTTPC Communications, Inc., Animate Ltd., The Asahi Shimbun Company, ASMARQ Co., Ltd., Cybozu, Inc., Impress Corporation, Japan Association for Financial Planners, JMA Management Center Inc., Kansai Mirai Bank, Limited, The Mainichi Newspapers Co., Ltd., Persona Co., Ltd., Resona Bank, Limited, Saitama Resona Bank, Limited, Satofull Co., Ltd., Sendenkaigi Co., Ltd., Sourcenext Corporation, Syuppin Co., Ltd., ValueCommerce Co., Ltd.	Aichi, Fukuoka, Kanagawa, Osaka, Saitama, Tokyo	[Web app exploit]	[Data leak]	51,628,280	[Investigating]
2026-10-15	2026-10-16	Sourcenext: mass leak of member data	[Critical]	1 Sourcenext Corporation	Tokyo	[API abuse]	[Data leak]	22,519,960	[Contained]