professional sumo wrestling
Refers specifically to the Japan Sumo Association's professional tournaments (honbasho) and the world of professional sumo, as opposed to amateur sumo.
Grand sumo tournaments are held six times a year.
He wants to become a professional sumo wrestler.
I watched professional sumo at the Ryōgoku Kokugikan.
I watch the professional sumo broadcast on TV every day.
The professional sumo tournament starts next week.
The professional sumo ranking list was announced.