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nikkei-workspace-2026 · Disclosed 2026-10-04

日本経済新聞社: unauthorized access and impact

A Google Workspace account was accessed without authorization from late July. Data for 1,646 employees and contacts may be affected; reader and news-source data were excluded.

Cause unresolved / undisclosed

Outcome: Confirmed breach

Entry path and evidence

  • Reported fact

    A Google Workspace account was accessed without authorization from late July.

    [s1]本文 第1-4段落
  • Reported fact

    Data for 1,646 employees and contacts may be affected; reader and news-source data were excluded.

    [s1]本文 第1-4段落

Timeline

  1. Disclosure date established by the reviewed notice. [s1]

Reported response

  • Reported fact

    The password was changed after Google’s notification; no further unauthorized login was observed.

    [s1]本文 第1-4段落

Evidence relevant to prevention

Insufficient evidence

Undisclosed entry or patch timing prevents an avoidability assessment. Inspect privileges, retrieval logs, retention and deployed configuration using the linked rules.

Editorial assessment; not a determination of liability. [s1]

Unknowns and AI involvement

AI involvementUnknown

The reviewed disclosures do not establish attacker use of AI.

The original credential-theft route and actual exfiltration scope are undisclosed. A separate Microsoft 365 notice is not merged into this case.

Sources

  1. [s1] 日本経済新聞社 · Primary source

    日本経済新聞社：事故に関する公表資料 ↗

    Reviewed 2026-10-09