List of mammals of Japan
This is a list of mammal species recorded in Japan (excluding domesticated and captive populations). Of the 172 species of mammal found in Japan—112 native terrestrial mammals (those that are endemic are identified below; this number includes 37 species of bat), 19 introduced species, 40 species of Cetacea, and the dugong—161 are listed for the Japan region on the IUCN Red List of Threatened Species: of these, three taxa are critically endangered (Muennink's spiny rat, Yanbaru whiskered bat, and gloomy tube-nosed bat), twenty-two are endangered, eight are vulnerable, and eleven are near threatened; the Japanese sea lion and Bonin or Sturdee's pipistrelle are evaluated as extinct.