> JapanHacked_Cybersecurity incidents in Japan

Company

Office Tandem Co., Ltd.

Office Tandem Co., Ltd. (Higashi, Nagoya, Aichi; Information and communications) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-11-09.

Profile

Industry/type: Information and communications
Location: Aichi, Nagoya, Higashi

Public figures

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Metric	Value	Scope	As of	Source
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Incident history

Disclosed 2026-11-09Updated 2026-11-09Aichi, Hokkaido, Tokyo[Contained][Severity: Critical][Breached][Critical]
Selectable Gold Benefits: subcontractor’s cloud breach exposes identifiers for 198,660 people
[Intrusion][Credential abuse][Data leak][Service outage]Leaked 198.7KOrganizations 4

		Incident	Role	Impact level				Methods	Impacts		Status
2026-11-09	2026-11-09	Selectable Gold Benefits: subcontractor’s cloud breach exposes identifiers for 198,660 people	[Breached]	[Critical]	[Critical]	4 Benefit One Inc., Credit Saison Co., Ltd., Forestec Co., Ltd., Office Tandem Co., Ltd.	Aichi, Hokkaido, Tokyo	[Intrusion][Credential abuse]	[Data leak][Service outage]	198,660	[Contained]