Chimarrogale platycephalus


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Chimarrogale platycephalus
Species Authority: (Temminck, 1842)
Common Name(s):
English Japanese Water Shrew, Flat-headed Water Shrew
Chimarrogale platycephala (Temminck, 1842) [orth. error]

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Abe, H.
Reviewer(s): Amori, G. (Small Nonvolant Mammal Red List Authority) & Chanson, J. (Global Mammal Assessment Team)
Listed as Least Concern, although the species has continued to decline for the past 10 years or more, the level of decline has not approached 30%. However, a continued loss of populations due to habitat destruction and modification could result in this species moving to a higher category of threat. Of particular concern are the populations on Kyushu and western Honshu.

Geographic Range [top]

Range Description: This species is endemic to Honshu and Kyushu in Japan, and occurs primarily above 300 m asl in southern regions, and in the northern regions nearly from sea level.
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: It has been recorded from more than half of all survey sites ranging all over Honshu, but only a quarter of survey sites on Kyushu; thus, the species is believed to be common on Honshu, while the population in Kyushu appears smaller and fragmented.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: It favours rapid streams (and therefore streams usually at high elevations), with abundant boulders, large rocks or fallen logs.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): There are no major threats, although small dam construction and the paving of river embankments is a problem across the range.

Conservation Actions [top]

Conservation Actions: It is known to be present in numerous protected areas.

Citation: Abe, H. 2008. Chimarrogale platycephalus. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 29 August 2015.
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