> JapanHacked_Cybersecurity incidents in Japan

Company

Youji Katsudo Kenkyukai Co., Ltd.

Youji Katsudo Kenkyukai Co., Ltd. (Shinagawa, Tokyo; Education and learning support) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-10-20.

Profile

Industry/type: Education and learning support
Location: Tokyo, Shinagawa
Listing: TSE Standard 2152
Website: https://www.youji.co.jp/

Public figures

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Metric	Value	Scope	As of	Source
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Incident history

Disclosed 2026-10-20Updated 2026-10-20 12:30Tokyo[Investigating][Severity: Moderate][Breached][Moderate]
Youji Katsudo Kenkyukai: break-in at its company network; effect on data under investigation
[Intrusion]Organizations 1

		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-20	2026-10-20 12:30	Youji Katsudo Kenkyukai: break-in at its company network; effect on data under investigation	[Breached]	[Moderate]	[Moderate]	1 Youji Katsudo Kenkyukai Co., Ltd.	Tokyo	[Intrusion]		Unknown	[Investigating]