The U.S. National Aeronautics and Space Administration has begun unofficial negotiations with the Japan Aerospace Exploration Agency on purchasing units of the H-2 Transfer Vehicle (HTV), an unmanned cargo transfer spacecraft developed in Japan, as the successor to its space shuttles, which are to retire in 2010, The Yomiuri Shimbun learned Saturday.
http://www.yomiuri.co.jp/dy/features/science/20080720TDY01305.htm