Ōtsukasa was recruited by the former sekiwake Tochitsukasa, also a Nihon University alumni and head of the then-newly formed Irumagawa stable.

Initially fighting under his real name of Ōuchi, he won the makushita yūshō or championship in only his second tournament, with a perfect 7–0 record.

Ōtsukasa was ranked in the top division for three of the six tournaments held in 2007 but did not manage a majority of wins against losses in makuuchi after July 2004.

His departure left Tosanoumi, who is two days under a year younger than Ōtsukasa, as the oldest active sekitori.

His most frequently used kimarite or technique was a simple yori-kiri or force out, but he also favoured pushing or thrusting moves such as oshi-dashi and tsuki-otoshi, and pull downs such as hataki-komi and hiki-otoshi.

Ōtsukasa pulled out of the March 2009 tournament on the 13th day with only one win, facing certain demotion to makushita for the first time since 1998.

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