Investigating

JST: staff mailbox intrusion may have leaked stored email contents

After an external tip on July 28, 2026, investigation found stored mail in some officers’ mailboxes may have leaked; disclosed Aug 7 (counts refined Aug 28).

Last updated: 2026-11-09

Overview

Updated figures still use “about” (about 18,000 mails / about 1,400 external addresses / about 1,000 JST addresses) → count blank; subsets not summed.

Timeline

  1. Occurred
  2. Discovered
  3. Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

Sources

  1. 不正アクセスによる情報漏えいの可能性に関するお詫びとお知らせ国立研究開発法人科学技術振興機構 · 2026-11-09

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