The Sado shrew (''Sorex shinto sadonis'') is a subspecies of mammal in the family Soricidae. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

to Japan, and more specifically, the Japanese island of Sado. Although it is sometimes referred to as its own species, more recent scholarship identifies it as a subspecies of the

Shinto shrew The Shinto shrew (''Sorex shinto'') is a species of shrew of the genus ''Sorex'' that lives only on the islands of Japan. It is a mole-like mammal with a pointed snout, very small ears, and a relatively long tail. Like most shrews, it is tiny, ...

. However, there are significant morphological differences between the species.

References

Endemic mammals of Japan Sorex Taxonomy articles created by Polbot {{redtoothed-shrew-stub