To further increase the basic knowledge regarding the establishment of pest control for pepino (Solanum muricatum Ait.), we conducted surveys of pepino pests in Japan. Thirty-four insect and four mite species were recognized as pests of pepino plants in the present study. Including the results of previous studies, a total of 41 species of insects and mites have been reported as pests of pepino plants in Japan. Three species, namely onion thrips (Thrips tabaci), two-spotted spider mites (Tetranychus urticae), and cotton whiteflies (Bemisia tabaci), are likely the most important insect and mite pests of pepino plants, because they were collected from more than half of the study sites and were much more abundant on pepino plants than the other pest species.