All Breaches
April 16, 2021 Verified Sensitive Record Social networking

Atmeltomo 2021 Data Breach

The 2021 Atmeltomo data breach is a credential incident affecting a Japan-based email friend-search and community site.

580.2 Thousand
Reported Records
4
Data Types
High
Severity
Yes
Verification

Exposed Data Types

4
Email addresses
IP addresses
Unsalted md5 password hashes
Usernames

Additional Information

Added DateAugust 22, 2023
Breach DateApril 16, 2021
Domainatmeltomo.com
SourceAuthenticated email friend-search community credential corpus
Last Content UpdateJuly 29, 2026

Verification and editorial method

LeakData compares the incident name, date, affected-record count, and exposed data types with accessible sources. Unverified fields are not presented as facts, and records are updated when new evidence becomes available.

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Company Information

Company NameAtmeltomo
SectorSocial networking
CountryJapan
Websiteatmeltomo.com

Risk Level

High

The reported impact exceeds 100 thousand and falls within the high severity band.

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