expression, noun which may take the genitive case particle 'no'
from long ago; since ancient times
Used to describe something that has existed or been done since the distant past. Often modifies nouns with の or verbs directly.
この神社は古くからこの地にある。
This shrine has been in this place since ancient times.
古くからの友人に久しぶりに会った。
I met an old friend of mine for the first time in a while.