This species of frog is endemic to Japan. They live in Honshu and on Sado Island. The males are about 6 cm long and the females are up to 8 cm long. They have green backs, sometimes mottled with brown speckles. They usually live in coppices. During the breeding season, between April and July, they lay a foamy mass of eggs on branches or leaves above ponds, or in the surrounding grass together with others. After about a week, the eggs hatch and tadpoles wait for the rain in the foam. When it rains, they drop into the water with the dissolving foam. The population is decreasing due to shrinking forests. It was designated as a natural monument of Noto Town in November 1969.