Borboryctis euryae is a moth of the Gracillariidae family. It is known from Japan (Honshū, Kyūshū, Shikoku and Tusima). The wingspan is 6.9–8.1 millimetres (0.27–0.32 in). The larvae feed on Eurya emarginata and Eurya japonica. They probably mine the leaves of their host plant.