He won one championship in the second-highest jūryō division and four special prizes in his career, as well as two gold stars for defeating a yokozuna while ranked as a maegashira.

[7] After that, he enrolled at Sanbongi Agricultural High School along Nishikifuji,[8] and there he notably won the individual competition at the 2012 Gifu National Athletic Sumo Championships.

[12] Competing against more experienced opponents he however made relatively little impact in his first jūryō run but looked to be maintaining his place in the division before sustaining an injury in November 2015.

[15] Over the next six tournaments, Ōnoshō worked his way up the ranks of jūryō and a 9–6 result in March 2017 clinched his promotion to sumo's top division (makuuchi) for the first time.

In September 2017 at the rank of maegashira 3 he earned a kinboshi by defeating the eventual yūshō winner Harumafuji on his way to a second Fighting Spirit prize and a third 10–5 record.

[24] In May, however, he returned to action and secured his promotion back to the top division as he won the jūryō title by defeating Tsurugishō and ending the tournament with a 12–3 record.

[31] Ōnoshō, however, suffers two consecutive defeats at the hands of Ōzeki Kirishima and Yokozuna Terunofuji on Days 10 and 11 respectively, effectively removing him from the title race.

[32][33] Ōnoshō withdrew from the July 2024 tournament after suffering three defeats in the first three days, with his medical certificate reporting right ankle arthritis and ligament damage in his right knee requiring about three weeks of treatment.

[35] Ōnoshō suffered poor performances in the last two tournaments of 2024 due to continued right ankle and right knee issues, and had faced certain demotion to the makushita division.

[36] At a press conference the following day, Ōnoshō said that he would not remain with the Sumo Association and instead join a company that specializes in beauty products using horse ointment.

He became emotional when asked about his rivalry with the recently-retired Minatogawa (former ōzeki Takakeishō), with whom he had been competing since elementary school days, saying that he was unable to express his thanks to him until retiring.

[37] Sanshō key: F=Fighting spirit; O=Outstanding performance; T=Technique     Also shown: ★=Kinboshi; P=Playoff(s) Divisions: Makuuchi — Jūryō — Makushita — Sandanme — Jonidan — Jonokuchi Ōnoshō Fumiya's official biography (English) at the Grand Sumo Homepage