Sadao Wakabayama

was a sumo wrestler from Yame, Fukuoka, Japan. His highest rank was komusubi. He earned four gold stars for defeating yokozuna. After his retirement from active competition in 1961 he became an elder of the Japan Sumo Association under the name Shikoroyama.

Career Wakabayama was born in Beijing, China, and was separated from his parents while still a child. He attempted to locate his parents who he believed might have returned to Japan by joining a sumo touring party. Upon joining professional sumo he took the Japanese surname of Iwahira. He was recruited by the active yokozuna Futabayama and joined his Futabayama stable (later Tokitsukaze stable) in January 1942. He used Iwahira as his fighting name until one tournament after he was promoted to the top makuuchi division, when he adopted the shikona of Wakabayama, taking two characters from his head coach Futabayama. His birthplace was recorded on the banzuke as Yame, Fukuoka, although he later changed his surname to Aoyama (his wife's) and his birthplace to Omiya, Saitama.

Fighting style Wakabayama was small for a sumo wrestler at and , but he was a noted technician.

Modern top division tournament record Since the addition of the Kyushu tournament in 1957 and the Nagoya tournament in 1958, the yearly schedule has remained unchanged.