Company

Daiichikosho Co., Ltd.

Daiichikosho Co., Ltd. (Minato, Tokyo; Personal services and entertainment) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-10-08.

Profile

Industry/type

Personal services and entertainment

Location

Tokyo, Minato

Brands

Big Echo
DK Dining

Listing

TSE Prime 7458

Website

https://www.dkkaraoke.co.jp/

Public figures

Employees2,199Non-consolidated2026-03-31
Nikkei: 【第一興商】[7458]企業概要
Revenue¥116.7BNon-consolidated2026-03-31
METI: Gビズインフォ
Capital¥12.4BNon-consolidated2026-03-31
METI: Gビズインフォ

Metric	Value		As of	Source
Employees	2,199	Non-consolidated	2026-03-31	Nikkei: 【第一興商】[7458]企業概要
Revenue	¥116.7B	Non-consolidated	2026-03-31	METI: Gビズインフォ
Capital	¥12.4B	Non-consolidated	2026-03-31	METI: Gビズインフォ

Incident history

Disclosed 2026-10-08Updated 2026-10-26 18:29Tokyo[Investigating][Severity: Critical][Through a supplier][Critical]
Nippon Columbia Group: malware on a Daiichikosho contractor's PC
[Malware][Data leak]Leaked 8.7MOrganizations 2

		Incident	Role	Impact level				Methods	Impacts		Status
2026-10-08	2026-10-26 18:29	Nippon Columbia Group: malware on a Daiichikosho contractor's PC	[Through a supplier]	[Critical]	[Critical]	2 Daiichikosho Co., Ltd., Nippon Columbia Group Co., Ltd.	Tokyo	[Malware]	[Data leak]	8,724,000	[Investigating]