Brunei Essay. Brunei Essay. Brunei (Brunei Darussalam) is an Islamic sultanate located on the northern coast of the island of Kalimantan (Borneo) facing the South China Sea. It is divided into two sections, separated by territory (the Limbang Valley) of the state of Sarawak, Malaysia. The Sultan, His Majesty Sultan Haji Hassanal Bolkiah, is concurrently the prime minister, defense minister.