This story is best to be categorized as creepy. There is one other story I came across which is creepier ,about an allied Army unit stationed in neutral Switzerland, where a soldier, Private Reginald, had complete gone insane in and kidnapped and ate several children. But I could not find any evidence if this actually happened or if it was just a ghost story told by some grandfather.
However the Chichijima incident did really happen and it does include cannibalism. One of the survivors, is George H.W. Bush, the 41st President of the USA.In fact he was only 1 of the 2 survivors.