Ortmann, 1893
Carapace about 1.5 times as broad as long, covered with pavement of fine microscopic granules; gastric, cardiac, and branchial regions markedly convex; front composed of three obtuse teeth which are not much unequal in size; antero-lateral borders extremely arched and cut into 12 teeth, which are low triangular in shape and are basally fused with each other. Carpus of chelipeds with inner angle produced into a sharp tooth, dorsal surface with a few projections; palm with three spinules along upper border and several processes on outer face. (Türkay 1995)
Type locality: Tokyo Bay, Japan.
Range: Japan - Tokyo Bay (Ortmann, 1893), Yokohama and Enoshima (Parisi, 1916), Manazuru and Ajiro (Sakai, 1935), Sagami Bay and Tosa Bay (Sakai, 1939), Sagami Bay (Sakai, 1965b), Kii Province (Takeda & Koyama, 1974), Tokyo Bay, Sagami Bay, Izu Peninsula, Suruga Bay, Mikawa Bay, Kii Peninsula and Tosa Bay (Sakai, 1976a), Nezumigaseki, Yamagata Prefecture (Suzuki S., 1979), Kii Minabe (Miyake, 1983); Korea - Cheju-do (Kim, 1970, 1973); Taiwan.