This species is endemic to Japan. It is distributed in Kyushu, Shikoku, Honshu and southern Hokkaido. It has also been introduced to Izu Oshima.
Habitat and Ecology
It occurs in a wide variety of habitats ranging from coastal areas to high mountains. It breeds in still water where the larvae also develop. It can also be found in anthropogenic habitats.
The population is decreasing but it is not in significant decline.
The major threats to the species are mainly in the western part of its distribution. Infrastructure development for human settlement including the construction of roads are the main threats.
Its range includes several protected areas.
There are two subspecies: Bufo japonicus japonicus and B.j. formosus.
Yoshio Kaneko, Masafumi Matsui 2004. Bufo japonicus. In: IUCN 2014