From the Wikipedia page 
Kakonko 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 Kibondo District. Kakonko District is bordered to the north by Kagera Region, to the east by Geita Region, to the south by Kibondo District, and to the west by Burundi. Its administrative seat is the town of Kakonko.