Masamune is a masked Japanese professional wrestler. He currently works for Dotonbori Pro Wrestling and has also worked for Kaientai Dojo (K-Dojo) and Osaka Pro Wrestling (OPW) in Japan. For several years he formed a tag team with Japanese wrestler Hideyoshi and was also part of a group known as Bad Force. Greatly influenced by lucha libre, Masamune has followed Mexican tradition for masked wrestlers, so his real name is not a matter of public record.

Osaka Pro Wrestling is a Japanese professional wrestling promotion, founded in 1998 by Super Delfin. The promotion held a major flagship event called the Osaka Hurricane each year from 2003 to 2012 and also hosted the fourth edition of the Super J-Cup in 2004, which was the second edition of Osaka Hurricane. In 2010 Osaka Pro started a close working relationship with American promotion Chikara.