Operation Castle
James Matayoshi (born 1968) is the mayor of Rongelap Atoll in the Marshall Islands. He was appointed as Rongelap's mayor in 1995 and has served as chairman of the Marshall Islands Ports Authority since 2008. As the mayor of Rongelap, Matayoshi was noted for his activism on calling for the United States government to render assistance to Marshall Islanders suffering from radiation sickness as a result of a series of nuclear tests carried out under Operation Castle in the 1950s.