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JAENES
BLeak confirmedMay 25, 2026 announced

東京都（東京デジタルアカデミー）Data breach / unauthorized access incident

笹尾 祐太朗の写真Reviewed by Yutaro SasaoWritten by Leak Watch editorial team published ・ updated
Occurred on
Unconfirmed
Announced on
May 25, 2026
Severity
BIncidents centered on names and contact details.
Scale
2,438 people
Main impact
It was confirmed that names, emails, and hashed passwords for up to 2,438 people were leaked, and a CSV was illicitly downloaded due to insufficient access restrictions. Two ordinary citizens are included in that total.
Information involved
Email addressPasswordFull name
Cause / key point
Misconfigured access restrictions for the personal information storage area.
Industry
Government & municipal
Listing / capital
Government / public body

An operation of 東京都.

Sources
Last updated
October 20, 2026
Email addressPasswordFull nameHow severity is assessed →

Is this incident worth paying attention to?

Written & reviewed

笹尾 祐太朗の写真

Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.

CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.

Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:

Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction

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Attack method classification: Misconfiguration & access-control gaps(Data left readable by anyone)

Read the Misconfiguration & access-control gaps guide and national trends →

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