Agonopterix sapporensis is a moth in the Depressariidae family. It was described by Matsumura in 1931. It is found in Japan (Hokkaido) and the Russian Far East. The wingspan is about 11 mm. The forewings are light chestnut with a light basal patch bounded on the outer edge by a dark vertical patch. There are two black spots at the basal angle of the cell and two white spots surrounded by black circles in the cell at 1/2, joined by a black dash. There are also two faint white blotches from each set of cell markings to the subcosta.