Investigating

Kashiwa City: personal data in a limited-access page may have leaked after search-engine indexing

Possible data leak: The city announced on January 23 that a URL-restricted business page briefly appeared in search engines and that a posted zip contained personal data.

Last updated: 2026-11-09

Overview

Notice says “about 150” so count blank. Contents include addresses/names from a residential map and seals/names on drawings. Page was posted after a 25 Nov exclusion request and taken down on 27 Nov; 27 search-referrer hits were logged.

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. 柏市ホームページの事業者向け限定公開ページに掲載された,個人情報を含む資料の漏えいのおそれについて柏市 · 2026-11-09

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