Phyllonorycter acutissimae is a moth of the family Gracillariidae. It is known from Japan (the islands of Hokkaidà Â, Honshà «, Kyà «shà « and Shikoku) and Korea.
The larvae feed on Castanea crenata, Quercus acutissima, Quercus aliena, Quercus crispula, Quercus mongolica, Quercus serrata and Quercus variabilis. They mine the leaves of their host plant.