DLeak confirmedAugust 7, 2026 announced

デジタル庁（国家資格システム）Data breach / unauthorized access incident

Reviewed by Yutaro SasaoWritten by Leak Watch editorial teamAugust 7, 2026 published ・ October 20, 2026 updated

Occurred on: Unconfirmed
Announced on: August 7, 2026
Severity: DMinor misdirected disclosures, with deletion confirmed.
Scale: 150 people
Main impact: Names and affiliations of 150 people were mistakenly sent to another government ministry/agency; there is no evidence of onward transfer to third parties and deletion has been confirmed.
Information involved: Full name
Cause / key point: An error in creating the "ログイン履歴" (login history) file caused by ambiguous wording in the work procedure document.
Industry: Government & municipal
Listing / capital: Government / public body
Administrative system of デジタル庁.
Sources: 職員の個人情報の漏えいについて
Last updated: October 20, 2026

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Written & reviewed

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: October 20, 2026

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