He had been an amateur sumo champion at Nihon University but worked as a high school physical education teacher after graduation.

He began wrestling under his own surname of Narimatsu, but upon reaching sekitori status he adopted the formal shikona of Tomonohana, meaning "flower of wisdom.

In February 2003 he switched to the elder name of Asakayama owned by former ōzeki Kaiō, after it was vacated by ex-maegashira Ōwakamatsu who left the Sumo Association.

Prior to the March 2024 tournament Tomonohana was named the acting master of Miyagino stable in the place of the former Hakuhō, following the latter's discipline over the behavior of former sumo competitor Hokuseihō.

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