> JapanHacked_Cybersecurity incidents in Japan

Company

Gakken Educational Co., Ltd.

Gakken Educational Co., Ltd. (Shinagawa, Tokyo; Education and learning support) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-10-08.

Profile

Industry/type: Education and learning support
Location: Tokyo, Shinagawa
Website: https://gakken-educational.co.jp/

Public figures

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Metric	Value		As of	Source
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Incident history

Disclosed 2026-10-08Updated 2026-10-26 18:25Tokyo[Contained][Severity: Moderate][Through a supplier][Moderate]
Gakken: group sites down after unauthorized access to an external server
[Intrusion][Service outage]Organizations 3

		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-08	2026-10-26 18:25	Gakken: group sites down after unauthorized access to an external server	[Through a supplier]	[Moderate]	[Moderate]	3 Gakken Educational Co., Ltd., Gakken Inc., Gakken Medical Support Co., Ltd.	Tokyo	[Intrusion]	[Service outage]	Unknown	[Contained]