Kaiju

The Kaiju (界樹, Kaiju, literal meaning "World Tree") are gigantic magical trees found on the Kaishin. These trees grow magical apple-shaped fruits, which in turn sprout a race of deities known as Shinjin. Some Shinjin are selected to possibly become Kai or, if born from a golden fruit, automatically become Supreme Kai. Evil Shinjin born from the fruit are cast into the Demon Realm ruled by Makaioshin in order to be separated from civilizations, and they become Makaio.