From Amagaki to Shibugaki - Geography of an Apprenticeship

During the demonstration Carolina Pizarro says: “The oriental kaki is an ancestral tree from Japan. If you take a seventy or eighty-year-old tree, all its fruit, without exception, will be bitter. Only when the tree is more than one hundred years old will the first sweet fruit start to ripen. What do humans do to get sweet fruit earlier?
They go to an old tree and cut the sweet fruit’s branch to graft it onto a younger tree. Some trees will start to give sweet fruit, while others will continue giving bitter fruit. This is the passing of experience for me.”