The U.S. official documents has clearly defined them by Interrogation during W.W.2nd. Aug.20-Sept.10,1944. Details :http://goo.gl/WF15t
"comfort girl" is nothing more than a prostitute or "professional camp follower" attached to the Japanese Army for the benefit of the soldiers.

Even though Korean people have been insisting that the confort woman issue is "human rights issue" and "exploitation of women's sex", this doesn't seem to me nothing more than haight activity affected by crazy enthusiasm based on their long time anti Japan education.
If they insist that this is the activity for comprehensive women's rights, not aiming slanderous defamation to Japan, How could they explain about korean domestic miserable situation on prostitution issue? Watch out on your foot first! goo.gl/eRme09