Katsuhiko Nakajima, Japanese wrestler
Katsuhiko Nakajima (中嶋 勝彦, Nakajima Katsuhiko, born March 11, 1988) is a Japanese professional wrestler, signed to Pro Wrestling Noah. He started his career in Riki Choshu's Fighting World of Japan Pro Wrestling (WJ) promotion before heading to Kensuke Sasaki's Kensuke Office/Diamond Ring dojo and promotion. He has also wrestled for All Japan Pro Wrestling (AJPW), where he is a former World Junior Heavyweight Champion. An accomplished karateka, his style is based upon strong, fast kicks and strikes.

Nakajima made his professional debut aged 15 in a mixed martial arts contest and immediately made a name for himself in puroresu, earning the nickname "Supernova" and facing Hall of Famers such as Kenta Kobashi, Satoru Sayama, Jushin Thunder Liger, and Tatsumi Fujinami. He has competed in several notable Japanese promotions, including New Japan Pro-Wrestling (NJPW), Inoki Genome Federation, Pro Wrestling Zero1, Michinoku Pro, Dragon Gate, and currently, Pro Wrestling Noah.

He has set several age records throughout his career, including being the youngest wrestler to compete in AJPW's Champion Carnival tournament and the youngest to hold the World Junior Heavyweight Championship. He won the Tokyo Sports "Rookie of the Year" award in 2004 and the "Fighting Spirit" award in 2005. Having worked for Noah for most of his career, both as a representative of Diamond Ring and as a freelancer, he officially signed with the promotion in December 2015. He is a two-time GHC Heavyweight Champion, three-time GHC Junior Heavyweight Champion and a five-time GHC Tag Team Champion.