Kazuya Yuasa is a Japanese professional wrestler, better known for his ring names Gaina and Shisao. He has worked in Michinoku Pro Wrestling, Osaka Pro Wrestling and Okinawa Pro Wrestling, having titles in all the three promotions.

Kouki Iwasaki is a Japanese professional wrestler best known for his time in the Japanese promotion DDT Pro-Wrestling where he is a former KO-D 6-Man Tag Team Champion and King of Dark Champion.