onibi

thumb|Onibi (Wakan Sansai Zue) is a type of atmospheric ghost light in legends of Japan. According to folklore, they are the spirits born from the corpses of humans and animals. They are also said to be resentful people that have become fire and appeared. Also, sometimes the words "will-o'-the-wisp" or "jack-o'-lantern" are translated into Japanese as "onibi".

==Outline== According to the Wakan Sansai Zue written in the Edo period, it was a blue light like a pine torchlight, and several onibi would gather together, and humans who come close would have their spirit sucked out. Also, from the illustration in the same Zue, it has been guessed to have a size from about in diameter to about , and to float in the air about from the ground. According to Yasumori Negishi, in the essay "Mimibukuro" from the Edo period, in chapter 10 "Onibi no Koto", there was an anecdote about an onibi that appeared above Hakone mountain that split into two and flew around, gathered together again, and furthermore split several times.