sentences:  I would add that, on the average, living conditions in the comfort stations were practically identical to those in brothels set up for American troops during the Vietnam War.Historian Chunghee Sarah Soh notes that Hata had put the total number of comfort women at 90,000 in 1993 but he later revised the number downward because of "his political alignment with the conservative anti-redress camp in Japan that emerged in the latter half of the 1990s".Hata would expand his research into the 1999 book "Ianfu to senjō no sei" ("Comfort women and sex on the battlefield"), described by Sarah Soh as "a 444-page treatise on the comfort women issue".