Caloptilia semifasciella is a moth of the family Gracillariidae. It is known from the islands of Hokkaidō, Honshū and Kyūshū in Japan.[1]
The wingspan is 11–12 mm.
The larvae feed on Acer crataegifolium, Acer distylum, Acer micranthum, Acer rufinerve and Acer tschonoskii. They probably mine the leaves of their host plant.