> JapanHacked_Cybersecurity incidents in Japan

Company

Sompo Japan DC Securities Inc.

Sompo Japan DC Securities Inc. (Shinjuku, Tokyo; Finance and insurance) appears in 1 recorded precautionary service shutdown. It is not counted as an affected organization. The latest was disclosed on 2026-10-21.

Profile

Industry/type: Finance and insurance
Location: Tokyo, Shinjuku
Website: https://www.sjdc.co.jp/

Public figures

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Metric	Value		As of	Source
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Incident history

Disclosed 2026-10-21Updated 2026-10-27 19:58Aichi, Fukuoka, Hiroshima, Iwate, Kagawa, Miyagi, Nagano, Niigata, Osaka, Tochigi, Tokyo, Toyama[Investigating][Severity: Critical][Precautionary halt][Minor]
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	2026-10-27 19:58	RAKUS Light Cloud: unauthorized access to the blastmail email delivery service	[Precautionary halt]	[Minor]	[Critical]	345 Ichinoseki City, 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, Hiroshima City, Nagano Prefectural Government, Tokyo Metro Co., Ltd., Japan Petroleum Exploration Co., Ltd., Okazaki City, Toyama Prefectural Government, Utsunomiya City, Cells Inc., Creema Ltd., Daihatsu Motor Co., Ltd., Gyet Co., Ltd., Japan Council of Shopping Centers, Kanehara & Co., Ltd., Kyodo News, Nulab, Inc., Sasakawa Sports Foundation, Shikoku Railway Company, Takara Leben Co., Ltd., Tokamachi City, Tokyo Development Foundation for Agriculture, Forestry, and Fisheries, The Bank of Nagoya, Ltd., Sompo Japan DC Securities Inc.	Aichi, Fukuoka, Hiroshima, Iwate, Kagawa, Miyagi, Nagano, Niigata, Osaka, Tochigi, Tokyo, Toyama	[Intrusion]	[Data leak][Service outage]	Unknown	[Investigating]