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JAENES
BPossible leakMarch 6, 2026 announced

株式会社OAGコンサルティンググループ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
March 6, 2026
Severity
BIncidents centered on names and contact details.
Scale
Unknown
Main impact
Unauthorized access to employees' Chatwork accounts was confirmed, along with messages impersonating employees and the sending of suspicious URLs; the number of affected records has not been disclosed.
Information involved
User / member ID
Cause / key point
Unauthorized access to employees' Chatwork accounts.
Industry
Services & other
Listing / capital
Unlisted
Sources
Last updated
October 20, 2026
User / member IDHow 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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