Hypselodoris shimodaensis is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.

Hypselodoris shimodaensis has a pale pink-purple mantle and body with a white line down the middle of the back and a white margin to the mantle.

The mid-dorsal line stops between the rhinophores at the front and encircles the gill pocket at the back.

There is a white line along the top of the foot which extends behind the mantle.

The rhinophore clubs are orange with purple bases and the outer two-thirds of the gill leaves are orange.