Kōtetsuyama Toyoya (高鉄山 豊也) (July 9, 1942 – April 14, 1996), born Kōnoshin Suga (菅 孝之進, Suga Kōnoshin), was a sumo wrestler from Otaru, Hokkaidō, Japan. His highest rank was sekiwake. After his retirement he became an elder of the Japan Sumo Association and the head coach of .