> JapanHacked_Cybersecurity incidents in Japan

Government

National Diet Library

National Diet Library (Chiyoda, Tokyo; Education and learning support) appears in 1 related cybersecurity incident. The latest was disclosed on 2025-11-11.

Profile

Industry/type: Education and learning support
Location: Tokyo, Chiyoda
Website: https://www.ndl.go.jp/

Public figures

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Metric	Value		As of	Source
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Incident history

Disclosed 2025-11-11Updated 2026-10-23Tokyo[Contained][Severity: Moderate][Through a supplier][Moderate]
National Diet Library: development environment intrusion; suspected leak ruled out
[Intrusion]Leaked 40.4KOrganizations 2

		Incident	Role	Impact level				Methods	Impacts		Status
2025-11-11	2026-10-23	National Diet Library: development environment intrusion; suspected leak ruled out	[Through a supplier]	[Moderate]	[Moderate]	2 National Diet Library, Internet Initiative Japan Inc.	Tokyo	[Intrusion]		40,373	[Contained]