He turned professional in July 2006 and was the first wrestler born in the Heisei era to become a sekitori when he was promoted to the jūryō division in November 2010, alongside Takayasu.

A serious knee injury sustained in 2015 resulted in him falling greatly in rank, and he was not able to return to sekitori status.

However, in his third year of junior high school his parents divorced and he moved back with his mother to her native Philippines.

Both had the distinction of being half Filipino as well as simultaneously being the first two wrestlers to enter jūryō that were born in the Heisei Era.

In the January 2011 tournament, he won his first five bouts in a row, but on the sixth day in morning practice he injured a ligament in his right leg.

This continued in 2014, and his unimpressive 4–11 score at maegashira 13 led to his relegation to the jūryō division in July.

His downward slide continued in 2015 and absence from the dohyō meant he had fallen to the bottom of the makushita division by September.

After having surgery on his right knee for a dislocation and meniscus damage, he declared that he would enter the March 2016 tournament after a five basho absence.

He is only the second wrestler with top division experience to fall to jonokuchi since the beginning of the Shōwa era – the other being Ryūhō in 2012.

[3] Finally back on the active list for the September 2016 tournament, easily took a 7–0 perfect record and the jonokuchi championship and secured a second successive promotion with a 6–1 in jonidan in November.

[4][5] In July 2006, Masunoyama was the sole new recruit into professional sumo, and this garnered him a lot of attention with the press.

Sanshō key: F=Fighting spirit; O=Outstanding performance; T=Technique     Also shown: ★=Kinboshi; P=Playoff(s) Divisions: Makuuchi — Jūryō — Makushita — Sandanme — Jonidan — Jonokuchi