> JapanHacked_Cybersecurity incidents in Japan

Company

Nihon Shisan Souken Inc.

Nihon Shisan Souken Inc. (Chiyoda, Tokyo; Real estate and rental) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-05-14.

Profile

Industry/type: Real estate and rental
Location: Tokyo, Chiyoda
Website: https://www.nssg.co.jp/
Parent: Aoyama Zaisan Networks Co., Ltd.since 2013-10-01

Public figures

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Metric	Value		As of	Source
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Incident history

Disclosed 2026-05-14Updated 2026-10-22Tokyo[Contained][Severity: Major][Breached][Major]
Nihon Shisan Souken: ransomware attack
[Ransomware][Credential abuse][Data leak][Service outage][Extortion]Organizations 1

		Incident	Role	Impact level				Methods	Impacts		Status
2026-05-14	2026-10-22	Nihon Shisan Souken: ransomware attack	[Breached]	[Major]	[Major]	1 Nihon Shisan Souken Inc.	Tokyo	[Ransomware][Credential abuse]	[Data leak][Service outage][Extortion]	Unknown	[Contained]