Tatsunami stable
In January 2010 the Takanohana stable, along with the Ōnomatsu stable, Ōtake stable and the now defunct Magaki stable, was forced to leave the Nishonoseki "ichimon" after Takanohana declared his intention to run as an unofficial candidate in the elections to the Sumo Association's board of directors. In 2014 the four stables, and Tatsunami stable, formed their own "ichimon", with Takanohana as its head. In June 2016, the stable moved from Nakano to new premises in Kōtō City, closer to the Ryōgoku Kokugikan. In June 2018 the Takanohana "ichimon" broke up in the wake of Takanohana's dismissal of the Japan Sumo Association's board of directors after the Takanoiwa affair, with Takanohana stable and Tatsunami stable going independent. The Ōnomatsu, Ōtake and Chiganoura stables re-joined Nishonoseki "ichimon" in September 2018. Takanohana refused to align his stable with another "ichimon" as the Sumo Association requested, and announced that he was leaving the Sumo Association, submitting a letter asking Takanohana stable's wrestlers and personnel to be transferred to Chiganoura stable. This took effect on October 1, 2018.