Company

Tokyo Metro Co., Ltd.

Tokyo Metro Co., Ltd. (Taito, Tokyo; Transport and postal services) appears in 2 related cybersecurity incidents. The latest was disclosed on 2026-10-21.

Profile

Industry/type

Transport and postal services

Location

Tokyo, Taito

Also known as

Tokyo Metro

Services

Metpo

Listing

TSE Prime 9023

Website

https://www.tokyometro.jp/

Public figures

Employees9,532Non-consolidated2026-03-31
METI: Gビズインフォ
Revenue¥401.9BNon-consolidated2026-03-31
METI: Gビズインフォ
Capital¥58.1BNon-consolidated2026-03-31
METI: Gビズインフォ

Metric	Value		As of	Source
Employees	9,532	Non-consolidated	2026-03-31	METI: Gビズインフォ
Revenue	¥401.9B	Non-consolidated	2026-03-31	METI: Gビズインフォ
Capital	¥58.1B	Non-consolidated	2026-03-31	METI: Gビズインフォ

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][Through a supplier][Major]
RAKUS Light Cloud: unauthorized access to the blastmail email delivery service
[Intrusion][Data leak][Service outage]Organizations 345
Disclosed 2026-09-27Updated 2026-10-22Tokyo[Investigating][Severity: Major][Breached][Major]
Tokyo Metro: unauthorized access to the Metpo member service
[Intrusion][Data leak]Leaked 59KOrganizations 1

		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	[Through a supplier]	[Major]	[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]
2026-09-27	2026-10-22	Tokyo Metro: unauthorized access to the Metpo member service	[Breached]	[Major]	[Major]	1 Tokyo Metro Co., Ltd.	Tokyo	[Intrusion]	[Data leak]	59,000	[Investigating]