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honto

honto (run by Dai Nippon Printing Co., Ltd.) was hit in 1 recorded cybersecurity incident. The latest was disclosed on 2026-10-19.

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		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-19	2026-10-27 17:02	Ymirlink: unauthorized access to the Cuenote FC email delivery service	[Through a supplier]	[Major]	[Critical]	15 Central Japan Railway Company, Kyushu Railway Company, West Japan Railway Company, Ymirlink, Inc., Dai Nippon Printing Co., Ltd., Nomura Securities Co., Ltd., istyle Inc., NTTPC Communications, Inc., The Asahi Shimbun Company, Cybozu, Inc., Kansai Mirai Bank, Limited, The Mainichi Newspapers Co., Ltd., Resona Bank, Limited, Saitama Resona Bank, Limited, ValueCommerce Co., Ltd.	Aichi, Fukuoka, Osaka, Saitama, Tokyo	[Web app exploit]	[Data leak]	51,628,280	[Investigating]