Alishan is traditional territory of the headhunting Tsou people, whose rich oral histories describe the migrations of each ancient clans' ancestors into the area between Yushan and the Chianan Plain. Originally, each clan had its own settlement, with the first multi-clan town, Tfuya, only forming approximately 1600 CE. The earliest written record of the Tsou dates from the Dutch occupation, which describes Tfuya as having approximately 300 people in 1647. Ethnologists have attempted to reconstruct the development of Tfuya, proposing that each stage of clan migration could be equivalent to three or four generations of family.