Katsuhiko Nagata (????, Nagata Katsuhiko, born on October 31, 1973 in Togane, Chiba, Japan) is a Japanese olympic wrestler and mixed martial artist, who won the silver medal in 63–69 kg Greco-Roman wrestling at the 2000 Summer Olympics.He is also the brother of professional wrestler Yuji Nagata, who works for New Japan Pro-Wrestling (NJPW).