Comfort station originated in govt-regulated 'civilian prostitution'
The Yomiuri Shimbun published an article about ianfu:
Modern historian Ikuhiko Hata, a former professor at Nihon University, says the comfort women system should be defined as the "battleground version of civilian prostitution."
Comfort women were not treated as "paramilitary personnel," unlike jugun kangofu (military nurses) and jugun kisha (military correspondents). During the war, comfort women were not called "jugun ianfu" (prostitutes for troops). Use of such generic terminology spread after the war. The latter description is said to have been used by writer Kako Senda (1924-2000) in his book titled "Jugun Ianfu" published in 1973. Thereafter, the usage of jugun ianfu prevailed.