Bake ichō no sei
Translation: monster ginkgo spirit
Bake ichō no sei are the spirits of ginkgo trees. They are very tall, with bright yellow bodies the color of ginkgo leaves in autumn. They wear tattered old black kimono and carry small gongs.
They appear near very old ginkgo trees and strike their mallets. It’s not known whether there is some purpose to this other than making those who hear them feel strange or shocked.