Occurrence of polychaete worms at Fukiagehama Beach, an open sandy shore on the Kyushu Island, Japan was investigated at three sites representing reflective, intermediate and dissipative morphodynamic conditions on May and October 2011. Overall, five orders, eight families, twelve species were collected. Five, three, and all of the twelve species were recorded from reflective, intermediate, and dissipative sites, respectively. Occurrence of the species with robust parapodium Sigalion sp., Glycera brevicirris, Nephtys californiensis and Onuphis amakusaensis at all sites suggested their adaptation to the habitat under high wave exposure. Accordingly, tentative keys for the species found at Fukiagehama Beach was proposed.