The Asian Lesser White-toothed Shrew is recorded across parts of East Asia. A study found size differences between island and mainland samples.
A study comparing samples from the Korean Peninsula, Ulleung Island, and Jeju Island found that Jeju shrews had greater head-and-body and tail lengths than the mainland sample.
During the 2006 breeding season at a salt marsh in northern Taiwan, both males and females were found to mate with multiple partners. Multiple paternity was detected in 28% of the litters studied.
An extinction-risk assessment has not been added yet.