> JapanHacked_Cybersecurity incidents in Japan

Company

Sumitomo Mitsui DS Asset Management Company, Limited

Sumitomo Mitsui DS Asset Management Company, Limited (Minato, Tokyo; Finance and insurance) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-10-16.

Profile

Industry/type: Finance and insurance
Location: Tokyo, Minato
Website: https://www.smd-am.co.jp/

Public figures

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Metric	Value	Scope	As of	Source
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Incident history

Disclosed 2026-10-16Updated 2026-10-29 08:05Tokyo[Resolved][Severity: Moderate][Breached][Moderate]
Sumitomo Mitsui DS Asset Management: it detected unauthorized access at the contractor behind its direct-sales fund site and took My Page offline for about 10 hours
[Intrusion][Service outage]Organizations 1

		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-16	2026-10-29 08:05	Sumitomo Mitsui DS Asset Management: it detected unauthorized access at the contractor behind its direct-sales fund site and took My Page offline for about 10 hours	[Breached]	[Moderate]	[Moderate]	1 Sumitomo Mitsui DS Asset Management Company, Limited	Tokyo	[Intrusion]	[Service outage]	Unknown	[Resolved]