The Hokkaidà  frog or the Ezo brown frog (Rana pirica) is a species in the family Ranidae found in Hokkaidà Â, Japan, and Sakhalin, Russia. Its natural habitats are boreal forests, temperate forests, temperate shrubland, temperate grassland, rivers, swamps, intermittent freshwater lakes, freshwater marshes, intermittent freshwater marshes, arable land, ponds, and irrigated land.