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Breach occurred 2021-04-16Verifiedatmeltomo.com
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.
Data exposed
Frequently asked questions
The Atmeltomo data breach occurred on April 16, 2021. It was added to Have I Been Pwned's breach catalog on August 22, 2023.
580,177 accounts were affected by the Atmeltomo data breach, according to Have I Been Pwned's records.
The Atmeltomo breach exposed the following data types: Email addresses, IP addresses, Passwords, Usernames.
Yes. Have I Been Pwned has verified the Atmeltomo breach, meaning there's confirmed evidence the exposed data is genuine and tied to real accounts.
Use KazaSec's free Email Breach Checker (/tools/breach-check) to check whether a specific email address has surfaced in the Atmeltomo breach, or any other known breach — the tool never stores what you search.
Our free Email Breach Checker tells you whether a specific email address has surfaced in this breach — or any other known breach — without ever storing what you search.
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