> JapanHacked_Cybersecurity incidents in Japan

Business SaaS and e-mail

Saiattack

Saiattack (run by ReFact Inc.) was hit in 1 recorded cybersecurity incident. The latest was disclosed on 2026-10-16.

About the service

Run by: ReFact Inc.
Category: Business SaaS and e-mail
For: Businesses

Incident history

Disclosed 2026-10-16Updated 2026-10-27 19:58Aichi, Chiba, Fukushima, Hiroshima, Kochi, Miyagi, Nagano, Niigata, Tokyo, Toyama[Investigating][Severity: Critical][Through a supplier][Major]
Studio: unauthorized access to the cloud environment of the Studio website builder
[Web app exploit][Data leak]Organizations 28

		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-16	2026-10-27 19:58	Studio: unauthorized access to the cloud environment of the Studio website builder	[Through a supplier]	[Major]	[Critical]	28 Digital Agency, Nagoya City, Studio Inc., Chiba Prefectural Government, Hiroshima Prefecture, Nagano Prefectural Government, Money Forward, Inc., Niigata City, and US Inc., Hakky Inc., JIJ Inc., Link-U Group Inc., Luup, Inc., Money Forward Home, Inc., Money Forward Kessai, Inc., Money Forward X, Inc., RAKSUL Inc., ReFact Inc., Relic Inc., SmartHR, Inc., StoryHub Inc., Susaki City, Tamura City, ThinQ Healthcare Inc., Toho Gas Co., Ltd., Tohoku EPCO Frontier Co., Inc., TVer Inc., Zenmetry Corporation	Aichi, Chiba, Fukushima, Hiroshima, Kochi, Miyagi, Nagano, Niigata, Tokyo, Toyama	[Web app exploit]	[Data leak]	Unknown	[Investigating]

Other incidents of the operator (1)

Disclosed 2026-10-22Updated 2026-10-23Tokyo[Contained][Severity: Major]
Speee: unauthorized logins to group partner dashboards
[Credential abuse][Data leak]Leaked 3.8KOrganizations 2

		Incident				Methods	Impacts		Status
2026-10-22	2026-10-23	Speee: unauthorized logins to group partner dashboards	[Major]	2 Speee, Inc., ReFact Inc.	Tokyo	[Credential abuse]	[Data leak]	3,822	[Contained]