Sumitomo Riko President Matsui Sees Current Business Unfolding as Planned on August 25, 2016 in Interviews, Products Tetsu Matsui, president and COO of Sumitomo Riko Co. Ltd. (TYO:5191), said in a recent interview with Japan Rubber Weekly…... Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here Continue Reading