The Information Processing Society of Japan was founded by a group led by Yamashita Hideo and Wada Hiroshi, and the opportunity for doing so was the International Conference on Information Processing held in Paris in June 1959 under the sponsorship of UNESCO. Due to the success of the Conference, participants from various countries expressed a desire to hold such conferences periodically, and IFIPS (the International Federation of Information Processing Societies; the abbreviation was changed to IFIP one year later) was formed in the following year to sponsor the conferences. Japan decided to joint the IFIP, but there was no society representing this academic area at the time, so Yamashita Hideo, Wada Hiroshi and others issued a call for members, and founded the Information Processing Society of Japan (first President: Yamashita Hideo) on April 22, 1960. At first, this was a voluntary group, but it became a corporate juridical association three years later, in May 1963.