The slender shrew is a small shrew studied in forests and other habitats in northern Hokkaido. A field study during snow-free seasons found that small terrestrial arthropods were its main prey; breeding and young growth have also been studied in captivity.
Adults weigh about 3–4 g.
A field study in northern Hokkaido examined it in riparian forest, windbreaks, and spruce forest during seasons without snow cover. Small terrestrial arthropods were its main prey.
An extinction-risk assessment has not been added yet.