LONDON — Campaigners are calling on Prime Minister Taro Aso to apologize to and compensate the families of British men who were forced to work at a mine owned by Aso's father during World War II.

They are also urging the prime minister to resign because they feel he failed to acknowledge for several years his family firm's role in the use of slave labor, despite evidence to the contrary in the United States.

James McAnulty, from Glasgow, Scotland, was shocked when he learned a few months ago that the mine in which his father toiled was owned by Aso Mining Co.