Its summer coat is dark reddish brown on the back, while the winter coat is darker overall. It feeds on insects and spiders in leaf litter and occurs in mountains of Honshu, Sado, and Shikoku.
In summer, the back is dark reddish brown and the belly is grey or light brown. The winter coat is darker overall.
It lives in leaf litter and humus in mountain forest and shrubland, feeding on insects, spiders, and geophilomorph centipedes.
An extinction-risk assessment has not been added yet.