> JapanHacked_Cybersecurity incidents in Japan

Company

Hakuhodo Inc.

Hakuhodo Inc. (Minato, Tokyo; Scientific research, professional and technical services) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-10-20.

Profile

Industry/type: Scientific research, professional and technical services
Location: Tokyo, Minato
Website: https://www.hakuhodo.co.jp/

Public figures

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Metric	Value		As of	Source
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Incident history

Disclosed 2026-10-20Updated 2026-10-22Tokyo[Investigating][Severity: Critical][Breached][Critical]
Hakuhodo: unauthorized operation of the Housing Energy Saving 2024 campaign office system
[Intrusion][Data leak][Service outage]Leaked 23.9KOrganizations 2

		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-20	2026-10-22	Hakuhodo: unauthorized operation of the Housing Energy Saving 2024 campaign office system	[Breached]	[Critical]	[Critical]	2 Ministry of Land, Infrastructure, Transport and Tourism, Hakuhodo Inc.	Tokyo	[Intrusion]	[Data leak][Service outage]	23,918	[Investigating]