Donghae is a city in Gangwon Province, South Korea. Located on the east coast on the Sea of Japan is home to the two ports Mukho and Donghae. Until December 5, 1986 Bukpyeong latter was called. The city has a regular ferry service to Vladivostok in Russia and Sakaiminato in Japan.
Japan Tsuruga, Japan (13th April 1981) Russia Nakhodka, Russia (10 December 1991) China People's Republic of Tumen, China (April 28, 1995) United States Federal Way, United States (1 April 2000)