An Ozumo wrestler named Okinoemon KAGAMIYAMA, who lived during the Genroku era in the Edo period, started a tachiai style of touching a dohyo with his fist, and other wrestlers began to adopt this style.
土俵に拳をつける立ち合いは江戸時代の元禄の大相撲力士の鏡山仲右衛門が始めたものが広まったものである。