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JAENES
SPossible leakAugust 19, 2026 announced

ジェックス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
February 4, 2026
Announced on
August 19, 2026
Severity
SCompromise of deep personal data or usable credentials.
Scale
77,619 records
Main impact
Servers were affected by ransomware; after recovery, 77,619 customer inquiry records and 1,360 records containing only names were temporarily viewable, but no external leak has been confirmed.
Information involved
Email addressPhone numberHome addressFull name
Cause / key point
The cause is under investigation.About Ransomware
Industry
Retail & e-commerce
Listing / capital
Unlisted
Sources
Last updated
October 20, 2026
Email addressPhone numberHome addressFull 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: Ransomware(Encrypting data and demanding a ransom)

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