This publication, Recent Advances in Composites in the United States and Japan, contains papers presented at the United States/Japan Symposium on Composite Materials which was held in Hampton, Virginia, 6-8 June 1983. The symposium was sponsored by ASTM Committees D30 on High Modulus Fibers and Their Composites and E09 on Fatigue in cooperation with the National Aeronautic and Space Administration. Jack R. Vinson and Minoru Taya, University of Delaware, served as symposium chairman and secretary, respectively. Jack R. Vinson and Minoru Taya are editors of this publication.