Katsuni (born April 9, 1979 in Lyon, France) is a former French pornographic actress.

Katsuni is of French/Vietnamese heritage. Her father is Vietnamese and her mother's family is French. She is fluent in French and English. After studying political science for a year at Grenoble Institute of Political Studies, she entered the adult film industry in 2002 at about the age of 23, and has since appeared in over 370 films. In December 2006, Katsuni signed an exclusive performing contract with Digital Playground. She originally performed using the stage name Katsumi (a common given name in Japan for both sexes), but she was barred by a French judge in Créteil, France in January 2007 from using the name, after a woman named Mary Katsumi sued over the resemblance to her own name. In September 2007, Katsuni was fined €20,000 for violations of the ban on using the name "Katsumi". In 2011 she promoted Hentai during a comic convention in Angoulême, France In May 2006, she got breast implants, going from a size of 32B to a 34D. Her first film with her new breasts, French ConneX...