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Organizations involved in this incident2026-10-08Gakken: group sites down after unauthorized access to an external serverOpen the incident

3 results

CompanyEducation and learning supportTokyo, Shinagawa[Through a supplier][Moderate]
Gakken Educational Co., Ltd.
Incidents 1Latest 2026-10-08
CompanyInformation and communicationsTokyo, Shinagawa[Through a supplier][Moderate]
Gakken Inc.
Incidents 2Latest 2026-10-21
CompanyInformation and communicationsTokyo, Shinagawa[Through a supplier][Moderate]
Gakken Medical Support Co., Ltd.
Incidents 2Latest 2026-10-08

	Role
Gakken Educational Co., Ltd.	[Through a supplier]	[Moderate]	Company	Education and learning support	Tokyo, Shinagawa	–	–	1	2026-10-08
Gakken Inc.	[Through a supplier]	[Moderate]	Company	Information and communications	Tokyo, Shinagawa	–	–	2	2026-10-21
Gakken Medical Support Co., Ltd.	[Through a supplier]	[Moderate]	Company	Information and communications	Tokyo, Shinagawa	–	–	2	2026-10-08