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JAENES
ALeak confirmedJune 30, 2026 announced

JAさっぽろ（農林中央金庫）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
June 30, 2026
Severity
AFinancial and HR records — information that easily translates into monetary damage.
Scale
3,176 records
Main impact
3,176 records containing customer numbers, deposit balances, loan balances, etc. were erroneously provided to JAグループ関係団体 and a contractor, and have been deleted by the recipients.
Information involved
Not specified in the disclosure
Cause / key point
Cause is under investigation.About Supply chain attacks (via vendors & shared services)
Industry
Finance & insurance
Listing / capital
Non-profit corporation
Sources
Last updated
October 20, 2026
How 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: Supply chain attacks (via vendors & shared services)(Compromising the provider instead of the user)

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