Human Soul As A Ball Of Energy
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.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 2 kitsune producing kitsune-bi, literally meaning Foxfire.