> JapanHacked_Cybersecurity incidents in Japan

Media and books

ALC News+

ALC News+ (run by ALC PRESS INC.) was hit in 1 recorded cybersecurity incident. The latest was disclosed on 2026-10-21.

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https://newsletter.alc.co.jp/

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ALC News Plus

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ALC PRESS INC.

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Media and books

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People

Incident history

Disclosed 2026-10-21Updated 2026-10-28 22:31Aichi, Ehime, Fukuoka, Hiroshima, Hokkaido, Iwate, Kagawa, Kanagawa, Miyagi, Miyazaki, Nagano, Niigata, Osaka, Shizuoka, Tochigi, Tokyo, Toyama, Yamanashi[Investigating][Severity: Critical][Through a supplier][Critical]
RAKUS Light Cloud: unauthorized access to the blastmail email delivery service
[Intrusion][Data leak][Service outage]Organizations 345

		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-21	2026-10-28 22:31	RAKUS Light Cloud: unauthorized access to the blastmail email delivery service	[Through a supplier]	[Critical]	[Critical]	345 Ichinoseki City, ALC PRESS INC., H.I.S. Hotel Holdings Co., Ltd., HR Vision Co., Ltd., Kakaopiccoma Corp., Meitetsu World Travel, Inc., NHK Publishing, Inc., Niigata Nippo Co., Ltd., RAKUS Light Cloud Co., Ltd., Tohoku EPCO Frontier Co., Inc., Ministry of the Environment, City of Yokohama, Hiroshima City, Nagano Prefectural Government, Tokyo Metro Co., Ltd., Japan Petroleum Exploration Co., Ltd., Nagaoka City, Nobeoka City, Okazaki City, Setagaya City, Toyama Prefectural Government, Utsunomiya City, Better Home Association, Cells Inc., Chitose City, Cloud Circus Inc., Creema Ltd., Daihatsu Motor Co., Ltd., Digital Division Co., Ltd., The Ehime Shimbun Co., Ltd., Gyet Co., Ltd., The Institute of Actuaries of Japan, Japan Council of Shopping Centers, Kanehara & Co., Ltd., Kyodo News, Kyushu University, Nulab, Inc., Sasakawa Sports Foundation, Shikoku Railway Company, Shizuoka Gas Co., Ltd., Takara Leben Co., Ltd., Tokamachi City, Tokyo Development Foundation for Agriculture, Forestry, and Fisheries, The Yamanashi Nichinichi Shimbun Co., Ltd., ZIGExN Co., Ltd., The Bank of Nagoya, Ltd., Sompo Japan DC Securities Inc.	Aichi, Ehime, Fukuoka, Hiroshima, Hokkaido, Iwate, Kagawa, Kanagawa, Miyagi, Miyazaki, Nagano, Niigata, Osaka, Shizuoka, Tochigi, Tokyo, Toyama, Yamanashi	[Intrusion]	[Data leak][Service outage]	Unknown	[Investigating]