A visiting U.N. expert on the rights of migrants urged the government Wednesday to terminate its industrial trainee and technical intern program for workers from overseas, saying it may amount to "slavery" in some cases, fueling demand for exploitative cheap labor in possible violation of human rights.

"This program should be discontinued and replaced by an employment program," Jorge Bustamante, U.N. special rapporteur on human rights of migrants, told reporters at the U.N. Information Center in Tokyo.

While praising some government measures to alleviate the impact of the economic crisis on the foreign population, Bustamante noted the country still faces a range of challenges, including racism, discrimination and exploitation of migrants, based on information provided by civil society.