It inhabits in the coastal area north of Yamagata Prefecture and Fukushima Prefecture, and around Hokkaido, Japan. It is characterized by a lack of morphological features as a flounder, and it is very similar to marbled flounder. The blind side (white side) has pale yellow lines, but some individuals do not have it (marbled flounder does not have any yellowlines). The small protuberance between the eyes is slippery and scaleless (there are scales on marbled flounder), the overall body color is brown (green), and scales are larger and its body is thinner than marbled flounder. Eggs are pelagic and non-cohesive. Good fat and delicious from summer to autumn. Good for boiled. Large fish can also be eaten with sashimi (marbled flounder is also delicious, and in summer it becomes a substitute for the Japanese flounder Paralichthys olivaceus (Temming et Schlegel)).