The Hokkaido red-backed vole occurs on Hokkaido and nearby islands. Its back is dark yellow-brown to dark brown. A northern Hokkaido forest study found it more often in valley bottoms and gentle slopes with mixed bamboo and herbs.
The dorsal side is dark yellow-brown to dark brown, unlike the red-brown back described for Hokkaido C. rufocanus.
In a northern Hokkaido forest study, it was more common in valley bottoms and on gentle slopes with mixed Sasa bamboo and herb undergrowth.
An extinction-risk assessment has not been added yet.