Masan Bay

Masan Bay opens into the island-studded waters of Korea's southern coast. The land around its sheltered inner reaches formed part of the old districts of Ŭian and Happ'o. Under Koryŏ, their inhabitants supplied the Yuan expeditions against Japan; in 1408 the Joseon court combined the successor districts of Ŭich'ang and Hoewŏn to form Ch'angwŏn. Hills rise behind the bayshore.