Comfort women were young females taken from the Japanese army's new Asian possessions to service the sexual needs of its troops, from the 30s to 1945. The front-line brothels were called comfort stations, and military commanders considered them an operational necessity. Approximately 200,000 females were taken, primarily from Korea but also China, Formosa, Indonesia, the Philippines, the Netherlands, East Timor, and the West Indies. Emperor Hirohito was in command during this time.
Asian NGO groups in support of comfort women set up and international war crime tribunal in December 2000. 150 women are now receiving compensation.
There are several organizations, including the Washington Coalition for Comfort Women Issues (WCCW), the Korean Council for the Women Drafted for Military Sexual Slavery by Japan, the Asian Women's Fund (AWF), and Violence Against Women in War Network, Japan (VAWW-NET).
There is quite a lot of information on the web. In particular, Korean Women Drafted for Military Sexual Service in Japan , at http://witness.peacenet.or.kr/e_comfort/library/Linda-re.htm