佐渡ヶ嶽部屋
Kotoinazuma Yoshihiro (born 26 April 1962 as Masahiro Tamura) is a former sumo wrestler from Niiharu, Gunma, Japan. He made his professional debut in 1978, and reached the top division in 1987. His highest rank was "komusubi" and he earned two special prizes. After retirement he became an elder in the Japan Sumo Association and as of 2016 he is a coach at Sadogatake stable under the name Kumegawa.