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Confirmed

Hachioji City: childcare data for 11,997 children emailed to 22 facilities in error

On June 9, 2026 a billing email to 22 certified centers wrongly attached a citywide childcare roster. By June 11 all centers confirmed deletion without reuse; disclosed June 11.

Last updated: 2026-11-09

Overview

11,997 children.

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. 市内保育施設に在籍する児童情報の誤送信について八王子市 · 2026-11-09

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