I was startled when someone suddenly called out to me from behind.
There is a small garden behind the building.
noun, noun which may take the genitive case particle 'no'
Abstract use: hidden circumstances, unseen influences, or the people/forces operating out of sight. Common in phrases like 背後関係 and 背後にいる.
There seem to be complicated circumstances behind the incident.
His family's support was behind his success.
A man was standing behind her.
The attacker came at him from behind.
It seems a large organization is behind this incident.
The police are investigating what lies behind the case.