Ainu /ˈaɪnuː/adjective 1noun 2forms 1 adjective1 •Of or pertaining to the Ainu ethnic group or their language. noun2 •A member of the ethnic group indigenous to the northern Japanese island of Hokkaido. •Synonym of Hokkaido (“a dog breed”).[…] Hokkaidos or Ainus (smaller versions of the Akita); Akitas, Japanese Spitz, Japanese Chin, Nippon Terriers and Kai Ken. — 1983 formsAinus