Japanese Countryside Tale

I couldn't think of any other title than the one above. I don't think there's a better title than this. This is a story my mother told me about her childhood. When my mother was a child, her mother (my grandmother) used to tell her, "If you don't go to sleep quickly, Guugu will come!" to get her to sleep at night. When I asked, "What's Guugu?", she said, "Probably a 🐸 frog. It made a lot of noise." During my mother's childhood, after her grandmother said "Guugu is coming," the sound of drums would be heard, saying "Don Don." My grandmother would say, "Look, a tanuki is beating the drum, so hurry up and sleep." "We heard it every night back then. But no matter how much everyone tried to find out where it was coming from or who was playing it, they couldn't find out…" "I know now it wasn't really a tanuki playing, but I often wonder, where and who was playing that drum?" my mother used to say.