Company

Yamato Transport Co., Ltd.

Yamato Transport Co., Ltd. (Chuo, Tokyo; Transport and postal services) appears in 2 related cybersecurity incidents. The latest was disclosed on 2026-09-29.

Profile

Industry/type

Transport and postal services

Location

Tokyo, Chuo

Brands

Kuroneko

Website

https://www.kuronekoyamato.co.jp/

Parent

Yamato Holdings Co., Ltd.since 2005-03-31

Public figures

Employees158,2952024-02-15
METI: Gビズインフォ

Metric	Value		As of	Source
Employees	158,295		2024-02-15	METI: Gビズインフォ

Incident history

Disclosed 2026-09-29Updated 2026-10-26 18:29Tokyo[Contained][Severity: Critical][Breached][Critical]
Yamato Transport: unauthorized access to Kuroneko deferred payment
[Intrusion][Data leak]Leaked 5.3MOrganizations 4,100
Disclosed 2025-10-14Updated 2026-10-23Tokyo[Investigating][Severity: Critical][Breached][Major]
Yamato Transport: former employee took business partner data
[Insider][Data leak]Leaked 26.8KOrganizations 11,356

		Incident	Role	Impact level				Methods	Impacts		Status
2026-09-29	2026-10-26 18:29	Yamato Transport: unauthorized access to Kuroneko deferred payment	[Breached]	[Critical]	[Critical]	4100 Yamato Transport Co., Ltd.	Tokyo	[Intrusion]	[Data leak]	5,310,000	[Contained]
2025-10-14	2026-10-23	Yamato Transport: former employee took business partner data	[Breached]	[Major]	[Critical]	11356 Yamato Transport Co., Ltd.	Tokyo	[Insider]	[Data leak]	26,790	[Investigating]