---
title: Media Giant Nikkei Reports Data Breach Impacting 17,000 People
description: "Bleeping Computer: Japanese publishing giant Nikkei announced earlier today that its Slack messaging platform had been compromised, exposing the personal information of over 17,000 employees and business partners."
---

[Industry News: Cyber ](https://www.castlehalldiligence.com/cyber-news)

# [Media Giant Nikkei Reports Data Breach Impacting 17,000 People](https://www.castlehalldiligence.com/cyber-news/media-giant-nikkei-reports-data-breach-impacting-17000-people)

 Written by [Cybersecurity](https://www.castlehalldiligence.com/cyber-news/author/cybersecurity) | Nov 7, 2025 1:14:57 PM

#### 2025-11-04

Bleeping Computer: Japanese publishing giant Nikkei announced that its Slack messaging platform had been compromised, exposing the personal information of over 17,000 employees and business partners.

[Read more...](https://www.bleepingcomputer.com/news/security/media-giant-nikkei-reports-data-breach-impacting-17-000-people/)

[View full post](https://www.castlehalldiligence.com/cyber-news/media-giant-nikkei-reports-data-breach-impacting-17000-people)

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