East Sepik is a province in Papua New Guinea. Its capital is Wewak. East Sepik has an estimated population of 433,481 people and is 43,426 km square in size. Cherubim Dambui was appointed as East Sepik's first premier by Prime Minister Michael Somare upon the creation of the provincial government in 1976. Dambui remained interim premier untiā¦East Sepik is a province in Papua New Guinea. Its capital is Wewak. East Sepik has an estimated population of 433,481 people and is 43,426 km square in size. Cherubim Dambui was appointed as East Sepik's first premier by Prime Minister Michael Somare upon the creation of the provincial government in 1976. Dambui remained interim premier until 1979, when he became East Sepik's permanent premier with a full term. He remained in office until 1983.