Caloptilia issikii is a moth of the family Gracillariidae. It is known from China, Japan (the islands of Hokkaidō and Honshū) and the Russian Far East. The wingspan is 10.8-11.5 mm. The larvae feed on Alnus species, including Alnus japonica. They mine the leaves of their host plant. References issikii Moths of Asia Moths described in 1982