The Mitanni appear to have been a people of Indo-European origin,
more specifically Indo-Iranian. They seem to have venerated Vedic Deities
and their nobility used Indo-Aryan names, and worshipped Indo-Aryan Gods.
... to Amur River (sahaliyan ula). Its proper Ainu name, Karafuto (樺太) or Karaftu, was restored to the island by the Japanese during their possession of it ...