Specimens of nine crab species that are mainly distributed in the south of the Japanese archipelago (Cycloachelous granulatus, Ilyograpsus nodulosus, Macrophthalmus banzai, Metopograpsus thukuhar, Parapyxidognathus deianira, Ptychognathus capillidigitatus, Ptychognathus ishii, Scylla serrata, Varuna litterata) and two rare crab species (Camptandrium sexdentatum, Sestrostoma toriumii) were collected from rivers flowing into the Sagami Bay and adjacent waters to improve their records for this region. For some species, the specimens included ovigerous females or were collected in autumn and the following spring, suggesting overwintering and range extension in this region, possibly due to increasing water temperatures as a result of global warming.