He entered the dohyō for the first time in the March 2015 tournament and was given the name Mitakeumi. His name is taken from a mountain near his hometown of Agematsu named Mount Ontake (御嶽山. 御 can be read as On or Mi). The Umi part of his name comes from his stable, Dewanoumi. Although Mitakeumi suffered his first loss as a professional sumo wrestler to Daishōhō in his second bout of the tournament, this helped relieve tension, and he was able to finish with a strong 6-1 winning record. This propelled him to the rank of east makushita #3 in the next tournament where he got another 6-1 record and advanced to the second highest (jūryō) division of sumo in the July tournament. He became only the 11th wrestler promoted to jūryō after only two tournaments.