Business SaaS and e-mail

iPLAss

iPLAss (run by Dentsu Soken Inc.) was hit in 1 recorded cybersecurity incident. The latest was disclosed on 2026-11-04.

About the service

Website

https://iplass.org/

Run by

Dentsu Soken Inc.

Category

Business SaaS and e-mail

For

Businesses

Incident history

Disclosed 2026-11-04Updated 2026-11-09Saitama, Tokyo[Contained][Severity: Critical][Breached][Critical]
Lawson Entertainment: sports-entry breach puts 27,908 people’s data at risk, including health questionnaires
[Intrusion][Misconfiguration][Data leak]Leaked 27.9KOrganizations 5

		Incident	Role	Impact level				Methods	Impacts		Status
2026-11-04	2026-11-09	Lawson Entertainment: sports-entry breach puts 27,908 people’s data at risk, including health questionnaires	[Breached]	[Critical]	[Critical]	5 Dentsu Soken Inc., Lawson Entertainment, Inc., Triathlon Japan, Tokorozawa City, Ohme Marathon Foundation	Saitama, Tokyo	[Intrusion][Misconfiguration]	[Data leak]	27,908	[Contained]

Other incidents of the operator (3)

Disclosed 2026-11-04Updated 2026-11-06Tokyo[Contained][Severity: Major]
Dentsu Soken: FACERE access-control error puts up to 12,196 Enta GO users’ data at risk
[Intrusion][Misconfiguration][Data leak]Leaked 12.2KOrganizations 2
Disclosed 2026-10-16Updated 2026-11-09Aichi, Aomori, Chiba, Fukuoka, Fukushima, Gifu, Hiroshima, Hokkaido, Kagawa, Kagoshima, Kanagawa, Kochi, Kyoto, Mie, Miyagi, Nagano, Nagasaki, Niigata, Okayama, Okinawa, Saitama, Shiga, Tokyo, Toyama, Wakayama, Yamanashi[Investigating][Severity: Critical]
Studio: website builder cloud intrusion puts company and public-sector form submissions at risk
[Web app exploit][Data leak]Leaked 21.4KOrganizations 84
Disclosed 2023-06-06Updated 2023-07-11 08:05Tokyo[Contained][Severity: Major]
Dentsu Soken (then Information Services International-Dentsu): remote access device attack
[Intrusion][Data leak]Leaked 13.7KOrganizations 1

		Incident				Methods	Impacts		Status
2026-11-04	2026-11-06	Dentsu Soken: FACERE access-control error puts up to 12,196 Enta GO users’ data at risk	[Major]	2 Dentsu Soken Inc., Lawson Entertainment, Inc.	Tokyo	[Intrusion][Misconfiguration]	[Data leak]	12,196	[Contained]
2026-10-16	2026-11-09	Studio: website builder cloud intrusion puts company and public-sector form submissions at risk	[Critical]	84 Digital Agency, Nagoya City, Feedforce Group Inc., Studio Inc., AISIN Corporation, Aomori Prefectural Government, Chiba Prefectural Government, Fukuoka City, Gifu Prefecture, Hiroshima Prefecture, Kanagawa Prefecture, Kyoto City, Nagano Prefectural Government, Niigata Prefecture, Okayama Prefecture, Saitama Prefecture, Aomori City, Dentsu Soken Inc., Edogawa City, Isahaya City, Koriyama City, Kusatsu City, M3, Inc., Money Forward, Inc., Nagaoka City, Nagasaki City, Niigata City, Wakayama City, Yamanashi Prefecture, Akatsuki Inc., Akatsuki Media Studio Inc., Akatsuki Solutions Inc., Akatsuki Ventures Inc., and US Inc., CrowdWorks, Inc., ExaWizards Inc., Finatext Holdings Ltd., Fuchu City (Hiroshima), Fuller, Inc., GMO Flatt Security Inc., GMO MAKESHOP Co., Ltd., GMO TECH, Inc., Hakky Inc., Hida City, Itoigawa City, JIJ Inc., jinjer Co., Ltd., Kufu Company Holdings Inc., Link-U Group Inc., Luup, Inc., Minaminihon Broadcasting Co., Ltd. (MBC), Mitsuke City, Mizkan Co., Ltd., Money Forward Home, Inc., Money Forward Kessai, Inc., Money Forward X, Inc., Monicle Financial Inc., Monicle Research Inc., OMRON Corporation, RAKSUL Inc., ReFact Inc., Relic Inc., RIZAP Group, Inc., The Ryukyu Shimpo, Sakaide City, Shima City, SmartHR, Inc., StoryHub Inc., Susaki City, Tamura City, ThinQ Healthcare Inc., Toho Gas Co., Ltd., Tohoku EPCO Frontier Co., Inc., Tokyu Land Corporation, Tomakomai City, TVer Inc., Yuzawa Town, Zenmetry Corporation, RIZAP Co., Ltd., Kenkou Medical Service Co., Ltd., RIZAP Agency Co., Ltd., RIZAP Business Solutions, Inc., RIZAP Construction Co., Ltd., RIZAP English Co., Ltd.	Aichi, Aomori, Chiba, Fukuoka, Fukushima, Gifu, Hiroshima, Hokkaido, Kagawa, Kagoshima, Kanagawa, Kochi, Kyoto, Mie, Miyagi, Nagano, Nagasaki, Niigata, Okayama, Okinawa, Saitama, Shiga, Tokyo, Toyama, Wakayama, Yamanashi	[Web app exploit]	[Data leak]	21,368	[Investigating]
2023-06-06	2023-07-11 08:05	Dentsu Soken (then Information Services International-Dentsu): remote access device attack	[Major]	1 Dentsu Soken Inc.	Tokyo	[Intrusion]	[Data leak]	13,706	[Contained]