> JapanHacked_Cybersecurity incidents in Japan

Company

Tokai Software Development Co., Ltd.

Tokai Software Development Co., Ltd. (Shibuya, Tokyo; Information and communications) appears in 1 related cybersecurity incident. The latest was disclosed on 2025-11-13.

Profile

Industry/type: Information and communications
Location: Tokyo, Shibuya
Website: https://www.tokaisoftdev.co.jp/

Public figures

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Metric	Value		As of	Source
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Incident history

Disclosed 2025-11-13Updated 2026-10-23Tokyo[Contained][Severity: Critical][Breached][Critical]
Tokai Software Development: ransomware leaks Tokai University data
[Ransomware][Credential abuse][Data leak][Service outage]Leaked 193.1KOrganizations 2

		Incident	Role	Impact level				Methods	Impacts		Status
2025-11-13	2026-10-23	Tokai Software Development: ransomware leaks Tokai University data	[Breached]	[Critical]	[Critical]	2 Tokai Software Development Co., Ltd., Tokai University Educational System	Tokyo	[Ransomware][Credential abuse]	[Data leak][Service outage]	193,118	[Contained]