Viliami Mavaetangi Okalani Nasio (born 24 April 1986, Rewa, New Zealand) is an Australian professional boxer. Nasio is of Tongan Descent. Nasio is ranked in multiple major regional rankings, including 9th in WBO Asia Pacific and 2nd in WBC – OPBF. Nasio's biggest bout in his career was against Japanese boxer Kyotaro Fujimoto for the vacant WBC – OPBF Heavyweight Title and the first time fighting out of Australia as a professional. Nasio lost the bout by unanimous decision.