Terunofuji Haruo (Japanese: 照ノ富士 春雄, born 29 November 1991 as Gantulgyn Gan-Erdene (Mongolian: Гантулгын Ган-Эрдэнэ)), is a Mongolian-born naturalised-Japanese professional sumo wrestler. Wrestling for the Isegahama stable, he entered professional sumo in January 2011 and took the second division jūryō championship in his debut as a sekitori in September 2013. He took the top makuuchi division championship in May 2015, only 25 tournaments after his professional debut, which is the third-fastest behind Asashōryū and Takanohana's 23 tournaments. This earned him promotion to sumo's second-highest rank of ōzeki.