> JapanHacked_Cybersecurity incidents in Japan

Company

Nippon Telenet Co., Ltd.

Nippon Telenet Co., Ltd. (Toshima, Tokyo; Information and communications) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-03-17.

Profile

Industry/type: Information and communications
Location: Tokyo, Toshima

Public figures

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Metric	Value	Scope	As of	Source
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Incident history

Disclosed 2026-03-17Updated 2026-07-27 08:05Fukuoka, Osaka, Saitama, Tokyo[Contained][Severity: Major][Breached][Major]
Nippon Telenet: a ransomware-type attack encrypted some server files; no trace of data being sent outside was found
[Ransomware][Data leak][Service outage]Organizations 5

		Incident	Role	Impact level				Methods	Impacts		Status
2026-03-17	2026-07-27 08:05	Nippon Telenet: a ransomware-type attack encrypted some server files; no trace of data being sent outside was found	[Breached]	[Major]	[Major]	5 Nippon Telenet Co., Ltd., Daiwa Lease Co., Ltd., Kyuden Real Estate Co., Ltd., Mobility Platform Co., Ltd., UPR Corporation	Fukuoka, Osaka, Saitama, Tokyo	[Ransomware]	[Data leak][Service outage]	Unknown	[Contained]