Based on investigation of collections at the A.V.Zhirmunsky Institute of Marine Biology of the Far-Eastern Branch of the Russian Academy of Sciences (Vladivostok) and Zoological Instituteof the Russian Academy of Sciences (Saint-Petersburg), as well as on the analysis of published data, the species composition of shell-bearing gastropod mollusks of the Russian waters of the East Sea (Sea of Japan), consisting of 331 species and subspecies, has been identified. Eachspecies is assigned to a biogeographic grouping in the study area. Its type locality and habitat (depth and substrate) are also documented. The first part of this review includes 55 species from Patellogastropoda, Vetigastropoda and Cocculiniformia.