More than 220 conservative politicians, scholars and journalists Friday were set to send out letters to members of the U.S. House of Representatives over the weekend, asking them to drop a resolution on the "comfort women" currently before them.

The group's letter, which was also delivered Friday to U.S. Ambassador to Japan Thomas Schieffer, calls for dropping the resolution submitted by the House Committee on Foreign Affairs. The resolution urges Japan to formally apologize for forcing women into sexual slavery during the war.

The letter claims the sexual services provided to Imperial Japanese soldiers in the 1930s and 1940s were run as businesses for profit by nonmilitary groups that employed "professional prostitutes," and was the same situation as with other militaries around the world. It says there were no sex slaves.