Company

Mos Food Services, Inc.

Mos Food Services, Inc. (Shinagawa, Tokyo; Accommodation, food and drink) appears in 2 related cybersecurity incidents. The latest was disclosed on 2026-10-27.

Profile

Industry/type

Accommodation, food and drink

Location

Tokyo, Shinagawa

Services

Mos Card

Listing

TSE Prime 8153

Website

https://www.mos.co.jp/

Public figures

Employees505Non-consolidated2026-03-31
METI: Gビズインフォ
Revenue¥76.2BNon-consolidated2026-03-31
METI: Gビズインフォ
Capital¥11.4BNon-consolidated2026-03-31
METI: Gビズインフォ

Metric	Value		As of	Source
Employees	505	Non-consolidated	2026-03-31	METI: Gビズインフォ
Revenue	¥76.2B	Non-consolidated	2026-03-31	METI: Gビズインフォ
Capital	¥11.4B	Non-consolidated	2026-03-31	METI: Gビズインフォ

Incident history

Disclosed 2026-10-27Updated 2026-10-27 17:02Tokyo[Contained][Severity: Major][Through a supplier][Major]
Smartshare: unauthorized access to the OWNLY SNS campaign tool leaks Mos campaign entrants' data
[Web app exploit][Data leak]Leaked 14KOrganizations 2
Disclosed 2026-10-23Updated 2026-10-26 12:51Tokyo[Contained][Severity: Critical][Through a supplier][Critical]
Valuedesign: unauthorized access to the Value Card house e-money service
[Intrusion][Web app exploit][Data leak]Leaked 1.4MOrganizations 2

		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-27	2026-10-27 17:02	Smartshare: unauthorized access to the OWNLY SNS campaign tool leaks Mos campaign entrants' data	[Through a supplier]	[Major]	[Major]	2 Mos Food Services, Inc., Smartshare Inc.	Tokyo	[Web app exploit]	[Data leak]	14,034	[Contained]
2026-10-23	2026-10-26 12:51	Valuedesign: unauthorized access to the Value Card house e-money service	[Through a supplier]	[Critical]	[Critical]	2 Mos Food Services, Inc., Valuedesign Inc.	Tokyo	[Intrusion][Web app exploit]	[Data leak]	1,424,748	[Contained]