Since long ago; from ancient times or for a long period (indicating something has existed or continued for a long time).
この地方では古くから和紙が作られてきた。
In this region, washi paper has been made since long ago.
古くから伝わる歌が祭りで歌われた。
An old traditional song was sung at the festival.
この家は古くからの習慣を大切にしている。
This family cherishes customs that have been held for generations.