Rhopalovalva chidorinoki Nasu, sp. nov. is described from Japan, with the photographs of the adult and genitalia. The diagnostic characters of the new species are given with comparison with the allied species, R. exartemana (Kennel, 1901).
Keywords: Lepidoptera, Eucosmini, Rhopalovalva chidorinoki sp. nov., Tortricidae, Taxonomy.