> JapanHacked_Cybersecurity incidents in Japan

Company

Mitsubishi Gas Chemical Company, Inc.

Mitsubishi Gas Chemical Company, Inc. (Chiyoda, Tokyo; Manufacturing) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-10-16.

Profile

Industry/type: Manufacturing
Location: Tokyo, Chiyoda
Listing: TSE Prime 4182
Website: https://www.mgc.co.jp/

Public figures

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Metric	Value	Scope	As of	Source
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Incident history

Disclosed 2026-10-16Updated 2026-10-16 02:50Tokyo[Resolved][Severity: Moderate][Through a supplier][Moderate]
Mitsubishi Gas Chemical: HR system contractor T4C emailed a file with names and staff numbers of 2,092 former employees to another company
[Misdelivery][Data leak]Leaked 2.1KOrganizations 2

		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-16	2026-10-16 02:50	Mitsubishi Gas Chemical: HR system contractor T4C emailed a file with names and staff numbers of 2,092 former employees to another company	[Through a supplier]	[Moderate]	[Moderate]	2 Mitsubishi Gas Chemical Company, Inc., T4C Inc.	Tokyo	[Misdelivery]	[Data leak]	2,093	[Resolved]