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 made his first impact at the 2012 Asian Junior Athletics Championships, taking a silver, then won the 2014 World Junior Championships in Athletics in a championship record of 39:27.19 minutes.^[2] He also took a silver in the junior race behind Gao Wenkui at the 2014 IAAF World Race Walking Cup in China.^[3] Moving into the senior ranks he took bronze medals at the 2015 Asian Race Walking Championships and the 2015 Summer Universiade

He started 2016 with a win at the Asian Race Walking Championships.^[4] He was selected to represent Japan at the 2016 Summer Olympics and placed seventh in the final.

• 10,000 metres race walk – 39:18.04 min (2015)
• 10 kilometres race walk – 39:45 min (2014)
• 20 kilometres race walk – 1:18:53 hrs (2016)

All information from All-Athletics.^[5]