 During the war, Aso Tetsuo had examined the women for venereal disease and not surprisingly, proclaimed the young Korean girls to be much healthier than the Japanese prostitutes.Based his research of soldier-comfort women ratios, Senda estimated that there that number of comfort women was over 100,000.Drawing on interviews with Japanese military veterans, Korean men, and others in addition to relevant publications, Senda published his book in 1973.