Hiroaki Satō (born July 8, 1990) is a Japanese professional wrestler and mixed martial artist, better known by the ring name Hikaru Sato. Sato started his MMA career in February 2000, fighting for Pancrase Hybrid Wrestling. During the next eight years, Sato fought, on average, five times a year, compiling a record of 18 wins, 19 losses and four draws, which included fights against the likes of Keiichiro Yamamiya, Nathan Marquardt, Ryo Chonan and Yushin Okami. In May 2008, Sato transitioned into the world of professional wrestling, when he was signed by the Dramatic Dream Team (DDT) promotion.