Rana Japonica, commonly known as the Japanese brown frog, is a species of frog native to Japan. It typically inhabits rice paddies, wetlands, and forests, thriving in both terrestrial and aquatic environments. This frog is characterized by its brown or greenish-brown skin, which helps it blend into its surroundings. The Japanese brown frog is known for its distinctive croaking sound during the breeding season, which usually occurs in spring. It plays a vital role in the ecosystem by controlling insect populations and serving as prey for various predators, including birds and snakes.