Wŏnsan, previously known as Wŏnsanjin, Port Lazarev, and Genzan, is a port city and naval base located in Kangwŏn Province, North Korea, along the eastern side of the Korean Peninsula, on Sea of Japan and the provincial capital. The port was opened by occupying Japanese forces in 1880. Before the 1950–1953 Korean War, it fell within the jurisdiction of the then South Hamgyŏng province, and during the war it was the location of the Blockade of Wŏnsan. The population of the city was estimated at 329,207 in 2013. Notable people from Wŏnsan include Kim Ki-nam, a diplomat and former Vice Chairman of the ruling Workers' Party of Korea.
In 2013, it was announced that Wŏnsan would be converted into a summer destination with resorts and entertainment. Having spent his childhood years there, Kim Jong-un has expressed significant interest in further developing the region, with the construction of new infrastructure such as Kalma Airport, a dual-use civilian international airport and military proving ground. A state corporation, the Wonsan Zone Development Corporation, has been established with feasibility studies for a wide variety of hotels and commercial and industrial development.