Mindan (Korean:민단), or the Korean Residents Union in Japan (Korean:재일본대한민국민단), is the name of one of two main organizations for Koreans living in Japan, the other being Chongryon. Mindan has ties to South Korea and was established in 1946 in Tokyo, Japan. Currently, among 610,000 Korean residents in Japan who have not adopted Japanese nationality, 65 percent are members of Mindan, and another 25 percent are members of Chongryon.