Corythoxestis sunosei is a moth of the family Gracillariidae. It is known from Japan (Kyà «shà «, Honshà «, Okinawa) and China (Hunan).
The wingspan is 4.4-6.7 mm.
The host plants for the species are Adina pilulifera, Mussaenda parviflora, Mussaenda esquirolii, and Uncaria rhynchophylla. The larvae mine the leaves of their host plant.