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coastal geographic region in southern Myanmar (Burma). It comprises a long, narrow strip of land along the eastern coast of the Bay of Bengal and stretches from the Naf estuary on the border of the Chittagong Hills area (in Bangladesh) in the north to the Gwa River in the south. The Arakan region is about 400 miles (640 km) long from north to south and is about 90 miles (145 km) wide at its broadest. The Arakan Yoma, a range that forms the eastern boundary of the region, to some extent isolates it from the rest of southern Myanmar. The coast has several sizable offshore islands, including Cheduba and Ramree. The region's principal rivers are the Naf estuary and the Mayu, Kaladan, and Lemro rivers.