Dybowski's frog, (Rana dybowskii), is a species of true frog found in Northeast Asia. It is found in the Russian Far East, the Korean Peninsula, and the Japanese island of Tsushima. It possibly exists also in northeastern China, but this has not been confirmed. Adult Dybowski's frogs have a body length of 4.5–7.5 cm (1.8–3.0 in). The head and body are relatively broad; the skin is generally smooth, but with some small protuberances along the back. The male has a pair of vocal sacs which are used during the mating season. The back is largely tan to dark brown, and the belly is white.