Yotsuyu Yagiyama(八木山夜露Yagiyama Yotsuyu) is a minor antagonist appearing in JoJolion. Yotsuyu is an architect who worked on Higashikata Family mansion and the Baseball stadium where Aisho Dainenjiyama works. Yotsuyu is in reality a Rock Human belonging to the Rokakaka Smuggling Organization who attacks Josuke Higashikata in order to finish off Josuke's previous identity.