Similar phenomena are described in Japanese folklore, including Hitodama (literally "Human Soul" as a ball of energy), Hi no Tama (Ball of Flame), Aburagae, Koemonbi, Ushionibi, etc. All these phenomena are described as balls of flame or light, at times associated with graveyards, but occurring across Japan as a whole in a wide variety of situations and locations. Kitsune, mythical yokai demons, are also associated with will 'o the wisp, with the marriage of two kitsune producing kitsune-bi (狐火), literally meaning 'fox-fire'. These phenomena are described in Shigeru Mizuki's 1985 book "Graphic World of Japanese Phantoms" (妖怪伝 in Japanese).