Asahi Shimbun reports that a woman in Osaka discovered these pretty katydids in a field. Osaka Museum of Natural History entomologist Itaru Kanazawa identifies them as the larvae of Euconocephalus thunbergi (”kubikirigisu” in Japanese), a close relative of the katydid. While he says it is normal for these insects to change between green and brown to match their surroundings, pink and white are considered abnormal.Link