Barnacles of the superfamily Coronuloidea are epibiotic on marine vertebrates. In the present study, 13 species in 9 genera of coronulid barnacles were collected in Japan and a distributional map of epibiotic barnacles (Cirripedia: Thoracica: Coronuloidea) in Japanese waters is presented. The hosts including sea turtles, whales and dolphins and 4 species of these barnacles are listed as new records for Japan.