JoJo Part 1 has a reading club.
Though, Araki certainly made up quite some words, but certainly not the only author that does this. I would use Google to search (probably add とは to the end) – if I am lucky, there would be some results, or some clues, even if not in Jisho, Goo, or Weblio.
Well, there are – 流島 - Google Search