Daisuke Matsunaga (松永 大介, Matsunaga Daisuke, born 24 March 1995) is a Japanese male racewalking athlete who competes in the 20 kilometres race walk. He holds a personal best of 1:18:53 hours. He represented his nation at the 2016 Summer Olympics and was the 2014 World Junior champion. He started 2016 with a win at the Asian Race Walking Championships. He was selected to represent Japan at the 2016 Summer Olympics and placed seventh in the final.