The Ha, also called Waha (singular Muha), are an ethnic and linguistic group based in Kigoma Region in western Tanzania, an area they have traditionally called Buha. In 2001 the Ha population was estimated to number 990,000. Their language is Ha, also called Kiha or Giha, and is closely related to the Kirundi and Kinyarwanda spoken in neighbouring Burundi and Rwanda. Traditionally they have been farmers and cattle keepers, but the tse tse fly has made cattle keeping impossible in the northern parts of their territories, so hunting and honey gathering has had great importance there. In later years, many men from the Ha people have wandered to the Tanzanian coastline to work at sisal plantations there. Cattle have traditionally played an important role in Ha culture, being exchanged at weddings and so forth.