Toyonoshima Daiki is a former professional sumo wrestler from Sukumo, Kōchi, Japan. He made his professional debut in January 2002, reaching the top makuuchi division in September 2004. He was a runner-up in five tournaments, and earned ten special prizes. His highest rank was sekiwake, which he first reached in September 2008 and held for five tournaments in total. Following a suspension in July 2010 he was demoted to the jūryō division, but upon his return to makuuchi in November 2010 he took part in a playoff for the championship. He won four kinboshi or gold stars awarded for yokozuna upsets, three of them earned by defeating Harumafuji from 2013 to 2015. He wrestled for Tokitsukaze stable. He retired in 2020 and was an elder of the Japan Sumo Association under the name of Izutsu-oyakata until his departure from the association in January 2023.

Harumafuji Kōhei , previously known as Ama Kōhei , is a Mongolian former professional sumo wrestler. He was the sport's 70th yokozuna from 2012 to 2017, making him the third Mongolian and fifth overall non-Japanese wrestler to attain sumo's highest rank.