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The Rock Humans are a mysterious group that appears in JoJolion Not much is known about them, but what is known is that they can turn themselves into stone at will, have unnaturally long life spans, sleep for months at a time, and have something to do with the mysterious fruit, the Rokakaka.

An interesting fact about the Rock Humans is that so far, they seem to follow a certain naming theme referring to mountains. Both Dainenjiyama and Yagiyama are named after the Dainenjiyama and Yagiyama mountains respectively. Another interesting thing about this is that these mountains are located in Sendai, Hirohiko Araki's home town.