For river in Africa see Kasai River

Kangsabati River (Pron:/ˌkæŋsəˈbɑːtɪ/) (also variously known as the Kasai and Cossye) rises from the Chota Nagpur plateau in the state of West Bengal, India and passes through the districts of Purulia, Bankura and Paschim Medinipur in West Bengal before draining in the Bay of Bengal.