ユニマットライフData breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- July 3, 2026
- Severity
- DMinor misdirected disclosures, with deletion confirmed.
- Scale
- 126,947 records
- Main impact
- An Excel file sent from a branch office to a client contained a residual customer list (names, addresses, phone numbers, email addresses, employers; 126,947 records). It has been confirmed for all recipients that there was no external forwarding and deletion has been completed.
- Information involved
- Email addressPhone numberHome addressFull name
- Cause / key point
- Human error: a customer list that should have been saved as a separate file remained inside the order-form Excel file and was attached and sent.
- Industry
- Finance & insurance
- Listing / capital
- Unlisted
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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:
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: Under investigation / not stated(Cause not disclosed)
Read the Under investigation / not stated guide and national trends →