In the past, fighting, riots, banishment and persecution were accompanied by throwing stones. People threw stones to the house that had a woman as the son's wife in celebration or they did it on top of the torii making a wish. It was a child play, exorcism and fortune telling. The folklorist said these words after reading a huge amount of reference material over stone-throwing customs. He concludes that "the life of an academic study" is such a thing, which sounds refreshing. From "Stones" written by him.
November 3, 2018
from “Oriori no Kotoba” by Kiyokazu Washida, The Asahi Shimbun