The Yakutian knife (Sakha: Саха быһаҕа Sakha byhagha; Russian: якутский нож), sometimes called the Yakut knife, is a traditional knife of Yakuts (an ethnic group from the Sakha Republic (or Yakutia), region of Siberia), used for working with wood, hides, skins, fish and meat or for combat. The knife has been used in Yakutia for hundreds of years without significant changes in its design.