Mwayaya Sub-station in Kasulu is the second newest sub-station to serve coffee growers in Kigoma region with close to 4,000 coffee growing families and neighboring district of Ngara in Kagera region. Kigoma is known for its super, incredibly delicious coffee. In a medium roast, the beans have a sweet smell, with hints of honey and citrus. Coffee growers in Kalinzi area live side by side with Great Gombe Game reserve, the last home for Chimpanzee. Mwayaya substation shall promote sustainable good quality coffee production while sensitizing growers to adopt conservatory practices in their coffee production undertakings. Mwayaya substation is located at 4º28’ S and 29º49’E, 1,530m above sea level. It is 54 km from Kigoma town and just 11 km off Tanzania-Burundi frontier. Mwayaya sub-station is the only agricultural research substation in Kigoma region and the sole research sub-station dedicated for coffee in the whole western zone.
Function of Mwayaya Sub-station is to support the development of the coffee industry in Kigoma and adjacent districts by disseminating proven technologies to district extension staffs, farmers, and estates through the provision of training courses, promoting extension messages, to support the central research programme by facilitating on farm and on station research, facilitate effective two-way linkages.