What was exposed, when it happened, and which databases confirm it.
- accounts
- 1,158,046
- Breached
- April 16, 2021
- Last Update
- August 22, 2023
Were you caught in this breach?
Search your email, phone number or username against every record CheckLeaked indexes.
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What happened
In April 2021, "Japan's largest e-mail friend search site" Atmeltomo suffered a data breach that was later sold on a popular hacking forum. The breach exposed 1.3M records with 580k unique email addresses along with usernames, IP addresses and unsalted MD5 password hashes.
Compromised Info
- Email addresses
- IP addresses
- Passwords
- Usernames
Attestation
Four independent databases catalog this breach and they do not always agree. Each lane below is one source’s own count.
Sources & Link Methods
- LeakCheck— linked via automatic string matching
- HIBP
FAQ
What was leaked in the Atmeltomo breach?
The Atmeltomo breach exposed: Email addresses, IP addresses, Passwords, and Usernames.
When did the Atmeltomo breach happen?
The Atmeltomo breach was disclosed on April 16, 2021 and affected 1,158,046 records.
Am I affected by the Atmeltomo breach?
Search your email, phone or username at checkleaked.cc to find out whether your data appears in the Atmeltomo leak.