Eumetriochroa miyatai is a moth of the Gracillariidae family. It is known from the islands of Hokkaidō, Honshū, Shikoku and Kyūshū in Japan. The wingspan is 6.1–9 mm for the vernal (spring) form and 5.7-6.9 mm for the aestival (summer) form. There are two seasonal forms, which differ in size and colour: one is a vernal form with adults on wing in spring from April to July, and the other is an aestival form with adults on wing in summer from July to early September.