James Matayoshi (born 1968) is the mayor of Rongelap Atoll in the Marshall Islands. He was appointed as Rongelap's mayor in 1995[1] and has served as chairman of the Marshall Islands Ports Authority since 2008.[2] 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.[3]