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JAENES
BPossible leakSeptember 15, 2026 announced

大阪市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
August 9, 2026
Announced on
September 15, 2026
Severity
BIncidents centered on names and contact details.
Scale
106 people
Main impact
Through 大阪市’s recorded interview system, personal data of 106 applicants—such as names, email addresses, and phone numbers—may have been exposed. The report does not state that a leak has been confirmed.
Information involved
Email addressPhone numberFull name
Cause / key point
The city explained that the incident was caused by unauthorized access to a data analytics tool used by the contractor.
Industry
Government & municipal
Listing / capital
Government / public body

Local public body (大阪市)

Sources
Last updated
October 20, 2026
Email addressPhone numberFull 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: Unauthorized access (method undisclosed)(Breached, but the technique was not identified or disclosed)

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