Kasai is the central region of Democratic Republic of the Congo, known mostly for its diamond mines. Since 2016, the region has been destabilized by the violent Kamuina Nsapu conflict.
Kasai is known for diamond mines, and not much else.
There is one major airport in the region, Mbuji Mayi Airport (MJM IATA). While mainly a domestic airport, there are a small number of international flights from other African cities. A railway runs between Lubumbashi and Ilebo. As of 2021, there are a passenger trains from Lubumbashi as far as Mwene-Ditu with about 2-3 departures per month. Journey time for the full journey is scheduled to about 48 hours, but delays and breakdowns are common.
Roads are generally in bad shape, with many sections being almost impassable, especially during the rainy season.
Travel to Kasai is strongly discouraged. If you are employed in the area, your company will provide security. Otherwise don't go.