Toshihiko Nakago is the president of Systems Research and Development, a company that primarily programs video games for Nintendo Entertainment Analysis and Development video games. He has worked with Nintendo since the days of the Famicom, and has worked on such titles as Super Mario Bros. and The Legend of Zelda. Currently he serves mostly as a supervisor and advisor for various games on the The Legend of Zelda, New Super Mario Bros. and Wii Fit franchises which are programmed by SRD.