Bushi is a cultural and common linguistic region located in the eastern part of the Democratic Republic of the Congo, primarily within the South Kivu province. It lies along the Mitumba Mountains and includes the administrative territories of Walungu, Kabare, Kalehe, Mwenga, and Idjwi, as well as the city of Bukavu. Estimates of the population vary widely, ranging from 7 to 12 million inhabitants. The region is historically organized as a kingdom, subdivided chiefdoms.

The inhabitants of Bushi are known as the Shi (plural: Bashi; singular: Mushi), who are also referred to as Banyabungo. The Shi language, known as Mashi, belongs to the Central (Zone J) Bantu group and served as a lingua franca across the region, while common religious practices included belief in the supreme deity Nyamuzinda, venerated through ancestral spirits (Bazimu)—notably Lyangombe, a central spiritual figure in the 19th century. Agriculture forms the basis of the local economy, with the majority of the population engaged in farming. The Shi kingdom is headed by a hereditary monarch, the Mwami, currently Alexandre Kabare Rugemanizi III.

The inhabitants of Bushi are the Bashi, and their vernacular tongue is Shi. Etymologically, the term Bashi can be decomposed into the prefix Ba- and the root Shi. The prefix Mu- and its plural counterpart Ba- serve as grammatical morphemes indicating the singular and plural forms of nouns within the first noun class, which designates human beings. The semantic value of the root Shi is, however, more complex to define. This root appears in several words, such as mi-shi meaning "water", lwi-shi meaning "river", and kushira meaning "to lie down". It also occurs in Ishwa, which signifies fertile soil or a fertile field, derived from the combination of water and earth. The phoneme Shi conveys ideas of strength, power, knowledge, endurance, or the capacity to submit to authority or endure suffering. A customary chief or notable, when addressing his subjects, says "My Bashis". When addressing a common man, he uses the singular term Mushi.

Historically, the concept of Bushi has been subject to varying interpretations, with earlier literature often limiting it to a narrow political definition. In many prior publications, the territorial extent of Bushi was confined to the chiefdoms of Kabare and Ngweshe, thus excluding other neighboring chiefdoms such as Kaziba, Luhwindja, Burhinyi, Nindja, and Kalonge, which were either treated as peripheral or merely affiliated entities. This restricted definition has led to widespread confusion, particularly among external observers and scholars unfamiliar with the region's complex history. For instance, historian Jacques Marissal asserted that Bushi extended only from the Bahunde in the north to the Bishugi in the south and was bounded to the west by the equatorial forest. He noted that, around 1880, Bushi consisted of several small kingdoms, originally seven, but had since been reduced to four principal polities: Nabushi, Ngweshe, Katana (Karhano), and Karhongo. Similarly, Bernard Jean René Lugan acknowledged the ambiguity surrounding the region's territorial definition, accentuating that the geographic extent of Bushi remains contested.

The confusion between the political and cultural dimensions of Bushi may be attributed to the tendency to equate centralized political structures, such as those found in Kabare and Ngweshe, with broader ethnic and territorial boundaries. These structures, bearing strong resemblance to Rwanda's centralized monarchy, were often used as models for understanding governance across the interlacustrine region. However, cultural commonalities among the Bashi, such as language, customs, religious beliefs, and socio-economic institutions, have long constituted the foundations of a shared ethnic identity, independent of centralized political authority. As such, ethnic cohesion among the Bashi does not necessarily imply a unified political system. In recognition of the cultural unity of the Bashi and the shared sense of ethnic belonging expressed by local populations, the region of Bushi is best conceptualized using the phrase coined by historian Jean-Pierre Chrétien in his work on the Buha: "one people, several kingdoms".

Geographically, Bushi encompasses a substantial portion of South Kivu. It lies southwest of Lake Kivu, covering an estimated area of approximately 4,600 square kilometers, between 2° and 2°80' south latitude and 28°20' and 29° east longitude. The region is bordered to the east by the Ruzizi River, Lake Kivu, and Rwanda; to the west by the forested highlands of Bulega; to the north by the Nyabarongo River, Buhavu, and Bunyakiri; and to the south by the Lumvi and Bufuliru rivers. Administratively, Bushi comprises several traditional chiefdoms (later reorganized as collectivities following colonial rule and administrative reforms in 1972), including Kabare in the north, Ngweshe in the center, Nindja and Kalonge in the northwest, Burhinyi, Luhwindja, and Kaziba in the west and southwest. The territory spans across parts of the administrative territories of Walungu and Kabare, as well as sections of Mwenga, Kalehe, and Bagira (Bukavu).

The early settlement history of Bushi remains insufficiently understood due to limited and often biased sources. Existing written literature does not provide a comprehensive reconstruction of the remote origins of the Bashi, the processes through which the region was peopled, or the successive transformations of their socio-political institutions. Much of the early literature on Bushi was shaped by colonial-era research, with research disproportionately centered on the chiefdoms of Kabare and Ngweshe and influenced by the policies of the White Fathers. These missionaries advanced a doctrine in which traditional chiefs were to serve as intermediaries between colonial authorities and the local population. Such an approach produced a historiography disproportionately preoccupied with political and military structures, and one heavily entangled with racialized theories and Eurocentric presuppositions.

Early anthropological and historical interpretations, informed by evolutionist and diffusionist models, sought to classify the inhabitants of Bushi into three racial categories based on conjectured migratory "waves": the Barhwa (also known as Twa or Pygmies), regarded as indigenous forest dwellers; the Bantu, considered the dominant native population; and the Baluzi, portrayed as Hamitic migrants of Ethiopian or Nile Basin origin, frequently associated with Semitic peoples and imagined as a "dominant race". These theories mirrored racial typologies that shaped Rwandan historiography and were transposed to Bushi without empirical substantiation. While such theories persisted throughout the colonial era, they were also reinforced by deterministic ideologies privileging cultural and economic hierarchies. From the 1990s onward, however, scholars affiliated with the University of Zaire started a critical reappraisal of these narratives. Employing new methodologies in African historiography, they accentuated the significance of oral tradition, indigenous agency, and interdisciplinary approaches in an intellectual shift aimed at restoring African voices to the center of historical reconstruction and dismantling the distortions inherent in Eurocentric paradigms.