Toyonoshima Daiki (born June 26, 1983 as Daiki Kajiwara) is a professional sumo wrestler from Sukumo, Kōchi, Japan. He made his professional debut in January 2002, reaching the top makuuchi division in September 2004. He has been a runner-up in three tournaments, and has earned eight special prizes. His highest rank has been sekiwake, which he first reached in September 2008 and has held for four tournaments to date. 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.

Toyonoshima is the oldest son of a tofu maker. In his early years, he was an avid soccer player. However, his destiny changed after winning an area boys' sumo tournament championship. In junior high and high school, he was rivals with another future sumo wrestler who would go on to take the fighting name Kotoshōgiku. Kotoshōgiku is now a rival of his in professional sumo as well. After graduating from high school, Toyonoshima joined Tokitsukaze stable through a connection a friend of his father's had with the stable. He was below the minimum height requirement of 173 cm but was allowed to make his debut after passing a secondary physical exam.