Indicates that something happened a very short time ago, often with a nuance of immediacy or 'just this moment'.
He was here just a moment ago.
quite near; close by
Used for spatial or temporal proximity, often in the pattern ついそこ/そば/近く etc.
The post office is just over there.
unintentionally; without thinking; by mistake
Expresses doing something impulsively or against one's better judgment, often with a sense of regret or helplessness.
Even though I'm on a diet, I ended up eating cake without thinking.
I got a call from him just a moment ago.
The station is just right there.
I'm on a diet, but I ended up eating anyway.