Masato Naitō (内藤 真人, Naitō Masato, born 31 July 1980 in Toyota, Aichi, Japan) is a retired Japanese hurdler. He is the former national record holder for the 110 metres hurdles and 60 metres hurdles. He finished fourth at the 2005 Asian Championships and third at the 2006 Asian Games. He also competed at the World Championships in 2001, 2003 and 2005 as well as the 2004 Olympic Games without reaching the final round. He retired after the 2012 season.