We examined stomatopods specimens collected by field works, as well as those deposited in the museum to clarify the stomatopod fauna off Yamaguchi Prefecture in the Sea of Japan, we examined not only specimens by field works but also those deposited in the museums. The following 11 species were found: Odontodactylus japonicus (de Haan, 1844), Anchisquilla fasciata (de Haan, 1844), Harpiosquilla harpax (de Haan, 1844), Lenisquilla lata (Brooks, 1886), Levisquilla inermis (Manning, 1965), Lophosquilla costata (de Haan, 1844), Oratosquilla oratoria (de Haan, 1844), Quollastria fossulata (Moosa, 1986), Q. gonypetes (Kemp, 1911) and Squilloides leptosquilla (Brooks, 1886). This occurrence of Q. fossulata is the first record from Japanese waters.

Faughnia serenei Moosa, 1982, was thought to be distributed in Japan, but there have been no records based on specimens. In this study, I confirmed the distribution of this species in Japan using specimens in the collection of the Kitakyushu Museum of Natural History and Human History and a newly collected specimen from Miyazaki Prefecture. Partial sequences of COI and 16S rDNA of the mitochondrial DNA of the latter specimen are also reported.