Masanori Saito (斎藤 昌典, Saitō Masanori) (born February 1, 1942) is a retired Japanese professional wrestler better known as Mr. Saito or Masa Saito (マサ 斉藤). He wrestled for several years in various promotions operated by the National Wrestling Alliance (NWA). He later joined the World Wrestling Federation (WWF), where he teamed with Mr. Fuji to hold the World Tag Team Championship twice. He also won the AWA World Heavyweight Championship in 1990.