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BLeak confirmedJuly 15, 2026 announced

GovTech東京（東京アプリ）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
July 11, 2026
Announced on
July 15, 2026
Severity
BIncidents centered on names and contact details.
Scale
1 people
Main impact
It has been confirmed that one person's name, phone number, and email address were mistakenly sent to another user.
Information involved
Email addressPhone numberFull name
Cause / key point
Insufficient verification by the contracted vendor when sending the email.
Industry
IT & telecom
Listing / capital
Unlisted
Sources
Last updated
October 20, 2026
Email addressPhone numberFull nameHow severity is assessed →

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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: Misdirected sending & disclosure (human error)(Leaks caused by wrong recipients or exposure settings)

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