> JapanHacked_Cybersecurity incidents in Japan

Company

MEDIA NAVI, Inc.

MEDIA NAVI, Inc. (Shibuya, Tokyo; Information and communications) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-10-21.

Profile

Industry/type: Information and communications
Location: Tokyo, Shibuya
Website: https://www.medianavi.co.jp/

Public figures

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Metric	Value	Scope	As of	Source
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Incident history

Disclosed 2026-10-21Updated 2026-10-30Aichi, Ehime, Fukuoka, Hiroshima, Hokkaido, Iwate, Kagawa, Kanagawa, Mie, Miyagi, Miyazaki, Nagano, Niigata, Osaka, Shizuoka, Tochigi, Tokyo, Toyama, Yamaguchi, Yamanashi[Investigating][Severity: Critical][Through a supplier][Critical]
RAKUS Light Cloud: blastmail mail system intrusion
[Intrusion][Data leak][Service outage]Organizations 345

		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-21	2026-10-30	RAKUS Light Cloud: blastmail mail system intrusion	[Through a supplier]	[Critical]	[Critical]	345 Ichinoseki City, ALC PRESS INC., H.I.S. Hotel Holdings Co., Ltd., HR Vision Co., Ltd., Kakaopiccoma Corp., MEDIA NAVI, Inc., 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., Chubu Electric Power Co., Inc., Japan Petroleum Exploration Co., Ltd., Nagaoka City, Nobeoka City, Okazaki City, Setagaya City, Shimonoseki 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., Kiho Town, Kyodo News, Kyushu University, National Mutual Insurance Federation of Agricultural Cooperatives, Nulab, Inc., Sasakawa Sports Foundation, Shikoku Railway Company, Shizuoka Gas Co., Ltd., Shunan City, 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, Mie, Miyagi, Miyazaki, Nagano, Niigata, Osaka, Shizuoka, Tochigi, Tokyo, Toyama, Yamaguchi, Yamanashi	[Intrusion]	[Data leak][Service outage]	Unknown	[Investigating]