[1] He began sumo in his fourth year at Isahaya City Yue Elementary School,[2] later saying of his introduction to sport that he saw it only as an extension of playground games.

[2] In his fourth year, however, he suffered a meniscus injury to his left knee and to his anterior cruciate ligament at the All Japan University Sumo Tournament in Uwajima, Ehime on 29 April 2015.

[3][9] He joined professional sumo in 2016,[10] entering Sakaigawa stable, his master (former komusubi Ryōgoku IV) also being from his home prefecture.

[11] His professional debut was postponed because of his torn anterior cruciate ligament in his left knee, and this injury could have cost him his wrestling career by putting him over the maximum age for becoming a wrestler at the time (23).

After a good performance during the 2023 January tournament, in which he scored five wins in a row during his last five matches,[18] he was promoted to jūryō 9, his highest rank at the time.

However, after a weak performance at the March tournament, Tsushimanada was relegated to jūryō 14, threatening him with demotion back to the makushita division.

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