Another Japanese myth going back Centuries, The Hitodama were said to be the Souls of recently departed Ones, who have 2 to 3 days to seek out still living relatives. This ''meeting'' can be to reassure the still remaining, or give grave warning. Only said to be seen by the intended relative, should an unfortunate non-family member behold The Hitodama, they would be dead by the time they turned 28 years. This death figure has never really been explained, but it is assumed that ''older'' persons were smart enough to avert their gaze or likewise warn away the foolhardy. Said to be great balls of ''firelight'' ranging from blue, to red, yellow and orange – after the 3 days visit, they simply vanish. Many explanation have been given on the phenomenon – to include swamp gas, tectonic plate reactions to various ground minerals and even decomposition gases from cemeteries.