Fromthe Wikipedia page 
Buhigwe District is one of the eight districts of the Kigoma Region of Tanzania. It is one of the 20 new districts that were formed in Tanzania since 2010; it was split off from Kasulu Rural District. Buhigwe District is bordered to the north by Burundi, to the east by Kasulu Rural District and Kasulu Urban District, and to the west by Kigoma Rural District. Its administrative seat is the town of Buhigwe.