Rusizi River, a river which flows between Lakes Kivu and Tanganyika, in Rwanda, Burundi and the DRC
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Rusizi National Park, a park based on the river Rusizi near Bujumbura, Burundi
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Cyangugu, capital of Rusizi district, also sometimes known as Rusizi
Koko River, Rusizi District, a river in the Rusizi District of southwestern Rwanda that is a right-hand tributary of the Ruhwa River