What was exposed, when it happened, and which databases confirm it.
- accounts
- 287,898,958
- Breached
- December 1, 2015
- Last Update
- August 30, 2016
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 late 2015, the anime community known as Nihonomaru had their vBulletin forum hacked and 1.7 million accounts exposed. The compromised data included email and IP addresses, usernames and salted hashes of passwords.
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.
286,201,676 accounts DEHASHED reports beyond HIBP
Sources & Link Methods
- LeakCheck— linked via automatic string matching
- Dehashed— linked via AI direct match to LeakCheck (70% confidence)
- HIBP
FAQ
What was leaked in the Nihonomaru breach?
The Nihonomaru breach exposed: Email addresses, IP addresses, Passwords, and Usernames.
When did the Nihonomaru breach happen?
The Nihonomaru breach was disclosed on December 1, 2015 and affected 287,898,958 records.
Am I affected by the Nihonomaru breach?
Search your email, phone or username at checkleaked.cc to find out whether your data appears in the Nihonomaru leak.