deparent

I think it is a normal process for animals (including human beings) to be separated from the parents at a certain age. (The problem is that it doesn’t occur normally these days in many of the families here.)

We have the following words:

OYABANARE: children’s becoming independent of their parents (separation from parents)

KOBANARE: parents’ making their children become independent (separation from children)

I wonder if there are any such terms in English.

‘deparent’ or ‘dechild’?

Thank you.